The Scooter

Check this sexy machine out! My favorite tour necessity.

As innocent as it looks, this baby cruises at 17 miles per hour has two 21 cell, 25 volt 5000 mAh NiMh battery packs hidden in the belly, each good for 10 miles on flat ground and the brushless motor offers almost zero rolling resistance, folds up and weighs in a mere 28 pounds! The Xootr EX3. Heck, back before 9/11 I used to ride to the airport from old house and carry it and a backpack on the plane for short trips. Unfortunately I am sad to say these are long discontinued. But if you ever can get your hands on one, you will not regret it.

Like everything though, things break. Especially if they are my things.

The most recent repair was a battery issue where a connection between calls broke. It's a bit of a pain to fix but at $175 bucks a pack, it is well worth the effort. By poking small holes in the shrink wrap I located where the bad connection was. Then cut away the shrink and carefully bend out the cell. The issue is trying to resolder the cell back in without dissembling the whole pack. But, since NiMh cells use the outer can as the negative, there is a workaround. If you solder a thin metal tab to the positive of the cell in the pack then slide the cell you bent out, back place:

You can cut away the shrink wrap and solder the tab to the outside of the can. It is a bit hard to see but if you look carefully, its there.

And back on track! And hey, look what I found!

An honor indeed! Thank you Travis, Mark and Tom for inviting me on this incredible adventure.

My Office!

Ok and on to:

**** Sound Nerd Speak ****

Ok, so one of the wonderful realities of our world as traveling sound humans is that everyday is a new adventure. So now that the Vortex (Orgasmatrons), Slotfire and V-Fire setups are running smooth and predictable, we can now start upping the anti a bit. We learned from Jones Beach shows that the Diagonal Vortex was effective for venues that require a narrower coverage. Remember that Vortex was designed to cover up to 135 degrees off axis but in a field or shed that is too wide. So rotating them 45 degrees does well for narrower coverage patterns.

But as anyone who has toured knows, we have to deal with a wide variety of setup spaces, restrictions and issues. So here are a few more setup variations for y'all to ponder.

Vortex two dimensional control. Offers rejection behind the subs and on stage. Needs space around them. Offers very wide coverage. Steerable. Occupies an 8 by 8 footprint.

Slotfire single dimension control. Coverage is symmetrical in front and behind. Works best when against a wall to block rear energy. Steerable width. Offers rejection center stage and somewhat behind. Controllable front compression alters sub tuning/tonality. Requires 13 by 4 footprint.

V-Fire single dimension control. Coverage is focused forward and reduced behind. Does nor require a rear wall. Steerable width. Offers rejection center stage and somewhat behind. The V is less than optimum and slightly downgrades the tonality. Requires 13 by 4 footprint.

But what to do in this venue in Birmingham? We had a fairly open space. The barrier to the right in the photo is audience side and just a blow through scrim. Unfortunately there was not enough room for a vortex without jamming up monitor world . Plus the vortex would have to be diagonal to be aimed right and there was no way. So here is a Smooshed Vortex setup.

The math works well and coverage should be good with excellent rejection behind and on stage. But wait? Really? Am I going to point a 3 stack of double 18"s at our monitor guy?

Well, it made me nervous enough that we setup one side with the middle speakers pointing toward the audience but the math was not a good.

and the other side as the calculations told me would be superior

And we fired it up and sure enough, we spun the other side and ran with double 18"s pointed right at a happy Steve!

And how about one more setup that may com in handy and is super easy. This is basically the setup we used at coachella and works on the same principle as the Slotfire

Two stacks of 6 subs per side. Space at 8.5 feet center to center. Lay in a 3ms delay to the outside stacks and bingo. Simple clean 180 degree 45 hz-ish center frequency cancellation towards center stage and focal points like 20 or 30 degrees off center. Longer delay widens and shorter will narrow. Though the side effect of other delay times is that your cancellation area moves around.

**** End Sound Nerd Speak ****

Two of these belong to me!

And off to watch Fall Out Boy!

Dave Rat

Each trade has tool set. The fundamental and most basic item around which that craft is formed. A carpenter's hammer, a logger's ax, a fisherman's rod. The older the craft the more archaic the tools tend to be.

For a chef, it is the knife, Here our head caterer Jeremy's love for these handmade Japanese folded steel knives is so deep it literally brings him to tears as explains their quality and craftsmanship

Speaking of crafts and using tools, here you can see the proper usage of an XL4 as an elevation platform while foot mixing.

Missy is our tour manager Adam's assistant and doing a fine job of making that Rat hoodie look awesome.

Ok, you are at a gig, option 1, head to your seat and watch the show, Option 2 hop into kiddie pool fully clothed with some dudes. Hmmm, tough tough decision.

Fortunately though, someone from the radio station that came up with this brilliant idea relieved us of this unsightly obstacle soon after the show ended buy dumping a torrential waterfall down the seats creating a 3" deep lake for the subs to sit in and the crew to saturate their shoes in during load out.

Check out this mirrored drum head!

**** Sound Nerd Speak ****

Ok, link of the day comes from my good friend Jamie Anderson who heads up Rational Acoustics. While I roll with my basakwards low tech and analog ways, Jamie does Smaart training and is all up on the other approach. So when he stumbled upon this gem, he knew where to send it. The ultimate analog delay!

http://www.uaudio.com/webzine/2005/august/text/content4.html

And on to less serious stuff. When I was laying out the initial Vortex designs, I started with what seemed a good place. Take the B sub and place in a conventional manner, then build from there. I really try to break down those barriers and open up to all possibilities but looking back I realize that it had no real logic other than just clinging to something familiar. And that decision made without fully justifying meant that the design was a bit less optimized than it could be.

Below you can see a simplified drawing of what is going on with the summations and cancellations of the Vortex setup. On the left side you see a counterclockwise setup on stage left. On the right side you see a counterclockwise setup stage right. Though the setups are the same, notice how much cleaner the left side is.

Green arrows represent summation, Red represents useful cancellations in the band that we are reproducing and gray is imperfect summation with some cancellation. The arrows are drawn from box center through box center. The arrow lengths are meaningless.

One of the issues we had with the original setup was that I was getting a bit too much sub off to the sides. So I started pondering and realized, hey wait, let's reverse directions of the Vortex and it should move our primary focus to the deep corners of the arena where we want it and paper and sure enough, the real world result matched the pen and paper prediction!

**** End Sound Nerd Speak ****

Ha, meet Juan (lampi), Robert Rat (stage), Josh (carpenter), Jim Rat (foh), Derek (automation - stuff that moves during the show, like Travis), Randy (Famous Stars and Straps promo), Jeremy (food), Me (trouble coordinator), and Justin (automation)

And so ends another terrible day at the office.

Dave Rat

**** Sound Nerd Speak ****

I have had quite a few people ask me "how did you come up with the sub layouts?" So, I started thinking about the train of thoughts that is passing by here at the moment. My first experimentation into 'subs pointed the wrong way,' was the Sub Cannon stuff I did with Peppers.

Thought actually they were pointed in the right direction, the setup had one set firing into the back of the next time delayed set. While it worked well, and rear rejection was clearly achieved, cumbersome steering that was realized by adding more or less level to them, so power was wasted if I reduced side coverage. But way before that, all the work I was doing with the MicroWedge designs over a decade ago kept pointing at the assets of physical placements and the importance of versatility. Physical placements, distances and the reducing the sheer physical size of the combined sound sources continue to be a significant challenge in all loudspeaker enclosure/array designs.

For this year's Coachella we did something very similar to the Slotfire setup where it relies on two sub sources 1/3 of a wavelength spaced. But once all the subs were stacked up, what we ended up with is a big wall of subs with a small gap in the middle separating the non delayed versus the delayed. Some delayed 18's were right next to non delayed 18's while others were 12 or more feet away.

Yet we are using a time delay of just 3 ms. The theoretical design is based on two point sources but the whole sub wall thing, while functional, has trouble getting out of it's own way. What we need is two nice clean point sources. But how do you do that with six double 18 boxes that are nearly two feet high and four feet wide?

From yet another angle there was the MicroSub project designed to use the coolness of actually being able to physically configure the boxes themselves to achieve desired results.

http://www.eaw.com/info/EAW/Loudspeaker_Product_Info/Current_Loudspeakers/MW_Info/MicroSub_Configs.pdf

Yes subs are very close to omni directional at low low frequencies and since low frequency wave lengths are long, it may seem that these configuration variations would have little or no effect on the output and coverage. But the reality is that there are significant audible differences and once I actually stacked these things up I found the assets of the configurations are even more pronounced than anticipated. The actual direction a sub is pointing does not matter much till you start getting above 60 0r 80 hz. While the 'on axis' focal point and distance between multiple sub sources rapidly gains importance as the frequency is raised.

**** Mini Offshoot Sound Nerd Speak ****

For example. The MicroSubs are 26" wide and 13" high and hold a single 15" speaker. If you stack two directly on top of each other on the floor like 'The Up Up' configuration,

the source dimensions are about 26" high by 15" wide plus ports so about 26"x24".

That would give us a side view pattern of something like:

As you can see we have we have reduced the vertical coverage, which optimizes for musicians a bit farther away and blows through the legs of closer artists when used as a sidefill.

Now slide the top MicroSub back till it drops into the 'Laid Back' configuration

and we now get something more like this

Where there is an up tilt giving us a nearer focus. Here the nearer artist is in the focus while the sound will tend to go over the heads of musicians father away. Plus, this is with just two MicroSubs. The stacked responses are of course achievable with conventional low profile subs but the additional option to utilize the angled configs with the MicroSubs is unique and can be very effective in tackling a wide variety of applications.

**** End Mini Offshoot Sound Nerd Speak ****

Ok, back to Vortex and Slotfire.

So taking what I learned from Sub Cannon's, MicroWedge, MicroSub lets next add in add in the cool enclosure designs like the dV-Sub http://www.l-acoustics.com/fichestech/dvsubgb.pdf where multiple speakers are pointed at each other to result in a powerful output from a small area.

And then it grew on me to combine it all and gain control over steering by creating a smaller and more manageable sound source dimensions and completely disregard the direction the sub speakers actually point. At that point all the ideas started flooding in as with so many restraints of design removed.

Here is the Slotfire, notice the two 18" wide 'slot' sources that offer distinct control.

And though the Vortex occupies an 8 ft by 8 ft by 5.5 ft high space, it offers a relatively small point source-ish output relative to conventional setups.

Oh, and this was the gig where we learned that the Vortex works best in open space and does not like to be near a wall. The Slotfires though, prefer a wall and shoot too much rear energy in open space. The V Fire:

is the no wall or hollow stage version of the Slotfire but does not quite sound as good.

**** End Sound Nerd Speak ****

So as I mentioned, I adore the new adventure feeling of opening the bus door to a brand new world. And some days you just got to grit your teeth and bear it. Dammit, where in the heck is the parking lot? Is that a gig through yonder forest?

The luxuries for a touring roadie crew are endless, but at least we get our own are to hang out in and relax.

I did it, I finally broke down and labeled my console.

So this Branson guy from Virgin decides to toss a party for 30,000 or so of he best friends, for free. Multiple stages, Blink, Weezer, Jet and lots of other cool bands

And what better way to make an entrance than to sky dive out of a helicopter onto the roof of the main stage at Blossom Amphitheater? None better! A bottle of Champagne

And away we rock. Can I say that this guy rules! And speaking of guys that rule, I am so happy to be touring once again with Craig Overbay! So great to hang with so many friends.

Dave Rat

Any of y'all who have followed my bloggery adventures for a while and I have not bored away, you may recall my FOH techs Nick the Fly and Happi-Lee. Nick started Peppers with me and I like to have out during the design phase early on. Then Lee joined on with his amazing and precise skill set that really locked the PA into an amazing level of consistency. For this Blink tour, Nick once again got me started up but I could not get Lee. Instead I have the fabulous honor to be working with none other than Jim Lockyer, new tour nickname yet to be determined.

I can not stress enough the importance of having a high quality PA tech. Especially for my spacey forgetful self. I heavily rely on my techs for consistency and attention detail as I want to walk into a setup as close to identical as humanly possible everyday. My goal is to purely focus on any venue to venue issue but the system and everything else must be in its proper place.

Now typically I am a calm and easy going individual but when there are issues that involve gross negligence, or complete disregard, I can really ramp up into a frenzy that I highly recommend everyone avoid. So imagine my surprise when I arrived at the sound board to fired up the system and noticed this

I know, it is hard to look at and sorry for putting you through it, but it was too big of an issue to let slide. Yes, the zig zaggy pad edge is missing its outer strip. Frozen in time I felt a full melt down rush over me. JIM, what the fuck kind of ship are you running here? I thought you were pro! You came highly recommended. Sigh, I thought you were my friend :(

Not only was the strip not in its proper position, it was actually sitting on the console for the last few shows. But since I mix in the dark and rarely look there, I had not noticed.

How am I supposed to mix the god damn show if I am limited in my padded roaming room? Can I mix like that? No I can't, no wonder the last two shows sucked ass. This absolutely unacceptable! Aaaargh! I am out of here. I can not work under these conditions but fortunately our head of tour security, Tony the Tiger, captured me as I was running off and convinced me to give Jim another chance.

He assured me it wont happen again and that he will do all posssible to be spot on from now on.. I was relieved to see his dedication renewed and I snapped this photo of Jim tuning the sound system the following day, notice the RTA mic with the orange spiral tape.

Here we can see Jim line checking:

So, far since "The Pad Event" he has held things together very well. Lets just hope that he keeps his wits about and priorities straight. And in case he forgets:

#1) No Lights! No board lights, no rack lights and computer screens must be facing away from me or off during the show.

#2) Carpet and pad setup properly.

#3) Wine glass never empty and make sure I drink plenty of water.

#4) The mixing Stick must be readily accessible at all times.

#5) Make sure most of the PA works and sounds halfway decent most of the time.

For those of you unfamiliar with the mixing stick:

Ok, now that I got that off my chest, enough with the serious stuff.

Hey, can you guess where in the truck the KUDO boxes were after the rainy gig?

I really am enjoying this tour and I really feel loved

And it's is fun! Ha!

**** Sound Nerd Speak ****

Finally, as a side note, Notice the modified Slotfire setup we are calling V Fire?

Basically, same theory as Slotfire, but closing the backs up puts a lot less sound under hollow stages. Slotfire does sound a bit better and offers a smaller point source as the V opening needs to be larger to work properly. But, sealing up the back really help. So wall or solid behind, we use Slot, Hollow or open behind, we use V. We even used a combo wit on slot and one V per side when the inside stacks were in front of the hollow stage and the outsides were against concrete.

**** End Sound Nerd Speak ****

Next up, well dunno yet but it will be some ramblings about something or other.

Dave Rat

Jones Beach. I remember the first time I ever did a show here was Lollapalooza 1992, the first of two shows went on with out a hitch but for the second show our little friend Hurricane Andrew decided to drop by for a visit and lay a category 5 wind and rainstorm on top of all the wires, speakers, lights and humans. Talk about torrential downpour! I have some old video of it somewhere that have been meaning to post. Pretty intense seeing the lights and PA swinging and mashing into each other. Big chunks of gear blowing over into foot deep puddles flowing in a cascading waterfall off the stage while sideways rain blows away tents and any attempt to protect the not so thirsty gear.

So I have settled into two subwoofer designs and hope to be able to flow one or the other into the rest of the tour gigs. The Vortex or Orgasmatron setup gives me a bit more control over coverage and allows me to disperse low end over a very wide area. Also the Vortex gives me excellent rejection on stage and directly behind the subs. Our other setup which I guess I will call the Slotfire Cannon. It is similar to the Sub Cannons I used to fire to the sides of the arena's on Peppers tour but they take up less depth, are more efficient and offer a bit better control. Being four feet deep and about 14 feet wide, the Slotfire should be able to drop into most sheds fairly easily. The has quite good control over widening coverage but offers very little cancellation behind the arrays. So for venues that have a wall behind the subs, the Slotfire is a good way to go. Conversely the Vortex work best if there is open space behind them.

Perhaps you noticed we spun the Vortex (Orgasmatrons) 45 degrees? Ahh for this gig it gave us better sighlines, so therfore better placement downstage and a bit more control. So here is the basics of the Slotfire setup as done morning of the show;

The theory on the Slotfire is to space two acoustic centers at 1/3 of a wavelength of the desired center frequency. For this I chose 45hz due to the sub design and program material I am sending, so about 8.5 feet or so. Then if I delay the outside acoustic source by 3.6 to 7.2, I gain a tremendous amount of control to steer the low end to the outside. Zero time delay gives me a figure 8 pattern, which I do not need as I want to steer outward and reduce power alley. Here are some simple predictions for one side

A 3.6 ms delay is 1/6 wavelength at 45 hz so if you apply that to the outside subs and add that to the 1/3 wavelength physical spacing, we get that 1/2 wavelength virtual spacing that gives nice cancellation towards the stage and steers low frequencies outward

And as we increase delay further it steers more outward.

So super simply I can control how wide the coverage is while reducing power alley, just by adding delay.

The trick though to get this all to work efficiently is to create two nice LF point sources with the subs. Ahhh, and that is where the super cool part comes. Because to get an 8.5 spacing of acoustic centers with 4 foot wide boxes means the stacks would only be 6" apart. Basically one big wall with some time delay mushing it up, which is lame and boooring! So what I did was to point the subs at each other with 12" spacing. Now I have two very clean 12" wide acoustic centers to work with. And wow! This setup kicks butt!

The sound of this setup is really solid and powerful, more so than the Vortex. But, keep in mind, the Vortex offers more control. If I setup the Slotfire in an arena, poor Steve and everyone else behind the subs would be completely obliterated. Never forget that the key is using the right tool for the right job.

Haa! I got to be the guinea pig for the flying drum riser test drive!

I think this was Montreal

May as well start introducing the awesome Rat crew out here putting up with my antics. Meet Jim, also known as Ice, not sure why but hey, nicknames rule. He is my FOH tech and the one who directly gets my world dialed in. I do put a lot responsibility on my tech, and really appreciate him keeping it together. Oh, Nick the Fly was out here but he went back to home world and was the front end guy that helped me get my wacky designs all dialed in.

This is Robert, he rocks the stage wire world

Scott Sugden (top left) came out for a few days to hang with us and Roz (working with Scott) is our laser room measuring K1 system design guru now that Nick is gone.

Manny is out here too promoting corn chips mainly but I think he does some PA setting up as well.

Re ran the orgasmatrons at Jones Beach. Good news is Mark Hoppus went inside during the show. Bad news is he tripped over the strap that holds them together and fell inside with his bass on mid show. Fortunately he did the party roll and landed on his back and seemed ok.

Hello Me

Jessica is our wonderful production assist and awesome to work with.

May as well toss some show shots in the mix

After the gig, we Blink fans all hang out waiting for the band.

Not really related but some say Pigeons are like flying rats, so I figured I would toss some props out to our flighty friend here.

Okey dokey artichokey. See ya soon for more brain twisting adventures soon.

Dave Rat

Comcast Center, formally Tweeter Center, formally Great Woods in Boston but actually is 25 miles away from Boston in Mansfield Mass.

The thin crust of an eggshell that had formed around my nearly two years at home has been sufficiently shattered for me to begin to see tour world clearly. You would think that well over two decades since my first tour, I would have a nice warm familiar groove to settle into. Hey, isn't touring like riding a bike? Once you do it, you know forever. Perhaps, but with so many complexities and patterns I have carved into over the years, which one will I be? As I re-enter tour life, which of my past tour patterns will envelop me and which pattern do I strive to embrace? Regardless of my intentions though, the unique dynamics of each band, travel rhythm, fellow crew friends and my life stability levels all whirl-spin together and at some point I find out where I land. It at that point which I can truly decide which direction to head.

And here I am starting with two extremes and working my way to the middle. Deep dives into technical ponderings in between reckless indulgence in the freedom from the mundane responsible of the everyday land locked life I lived just few weeks ago, all magnified by the gaping holes left where the things I miss reside.

Finishing up the design phase of adapting the sound system to sheds and finding a stable tour pattern. Must drink less because if I continue at this lushy pace I will start losing everything thing, like cameras, friends or my own humanly self. Oh, and also I need to work on finding this tour's hobby or adventure. Speaking of tour hobby, this is the exact venue that donated the seat to the electric go-cart I made on the 2003 Peppers tour!

http://www.ratsound.com/cblog/archives/177-Day-221-Dec-30-Home.html

And so, nothing truly is perfect but some things are way better than others and now that we have the sub Vortex system all dialed in, at least we are done doing arenas so I get to start all over. Would not want to get bored and running with 'typical' is soooo booooring.. Lets take a dive into the pleasure of coming up with a brand new shed design. Fortunately, the design of the various amphitheaters (sheds) varies so drastically, that nailing down a repeatable setup is going to be a challenge indeed. My strategy is to come up with three setups to select from and pick the optimum for each venue. The Vortex is choice #1 and surprisingly we were able to run with it in Milwaukee

How well do the Vortex actually work? On the down side, when you light up an entire arena with low end and really cover the sides well, the sound of the subs is naturally going to be a more 'roomy' over all sound. But that is a price I have to pay for getting a more consistent sub sound in the room.

Also, we are doing really well at getting a smooth sub level in front of the stage, but at the diagonals where the sub Vortex stacks are focused toward the deep part of the arena, there is substantial output, especially during the drum solo. So the sub output is hotter than I would like in those areas. That said, it is much more consist ant than any other ground stacked sub setups I have used. Oh, plus they look cool and I can alter the coverage a bit with delay times and levels.

One of the goals with the sub setup was to be able 'fill and not kill.' As in fill the arena and not kill Steve, Doug, Robert and Chris, the backline techs. Steve Walsh drives at the other end of the audio snake during the show and literally five feet away from the back of the subs. Chris is even closer. I will rock some pics of all the tour humans at some point but first I have to remember all the names.

Anyway, take a peak at the alternate shed setup

And the design notes:

And no matter how large you roll, someone somewhere just has to one up ya!

Dave Rat

**** Sound Nerd Speak ****

So it did not take long and all the attention paid to the Vortex setup has give rise to yet another naming possibility

I guess the next step is finding volunteers to test for proper function.

Welcome to my new office. Nice high ceilings, roomy, I even brought my chair from the Rat office so I could feel at home.

I realize the decorations leave something to be desired, but that will have to wait, nerd things first. Deciding what gear to bring on tour can be quite a challenge. Should I make the digital jump? Should I push for a $200,000 XL8 console? What is the newest latest and greatest? What are the budget, truck space and venue space constraints? Where o where shall that budget be spent and how do I justify the the expenses, at least to myself if no one else. My theory for getting the gear I want is simple and very effective. "Give me the tools I need to do my job and I will guarantee a quality result."

So what do I do when I could have just about anything I want? Well, first of all I get the what I truly believe to be the best large scale PA on earth right now. Next, I grab a nice big pile of old outdated clunky gear. Not the 'old' where they are getting expensive, but rather the 'old' where anyone can collect the stuff up by scanning eBay . I am running large! I am pretty sure that all of the gear I touch, there is only one piece newer than 15 years or so old.

Up top left is my Drawmer 1960 stereo tube comp I use on vocal subgroups, the meters don't read quite right so you never know if you are left right matched and it is perfect.

Next are 2 BSS DPR 404 quad comps that cover the rest of my subgroup compression. Stereo guitars, bass, Kick/Snare, stereo toms and metal things. I love those comps, I hate their elder brother, the DPR 402 though. Where the 404 is smooth and easy, the 402 are hard and useless to me.

The Aphex units are just for show and backups in case the 1960 dies

A couple Klark DN510's stereo gates and DN 514 do all my gating. Pair of kick mics, pair of snare mics, 2nd snare, 2 toms and spare. All good, I have tried many gates but keep coming back the 514's. I would just use 2 quads but the stereo units allow me to trigger both kick gates off of one kick mic. Same with snare top and bottom.

Next down is a CD burner that is fairly new but I do not count that as it is not in the signal path of the rock show.

Top right is the only real exception to the 'old and not getting expensive' theme. The PCM is my flat out favorite reverb. Rat owns 6 or so of them and it is pretty much all I use. In fact it literally on this tour is all I use. One reverb unit does vocals, toms and snare.

Being a guy that loves frill and uselessness in the audio mix, plus the desire to get all ego'd out on the sounds, I felt it necessary to actually use a second effect unit. I know, you are thinking two effects for an arena tour? Why so many? Some things I just cant explain, furthermore I am very embarrassed to say that the second effect is actually brand new. Yikes! But hey, this TC Helicon Voice Doubler works very nicely at adding a subtle but enjoyable thickness to the vocals.

Next in line is my trusty Eventide H3500. I brought it, thought I may need it but it is just filling rack space and acting as a spare.

Next is the broken DAT player that the door wont open on.

The next three units are dedicated to subwoofer processing. Since I personally refuse to scroll through any menus while I mix , even when I do use the 3500, I memorize the programs and punch them in directly. But for subs, I want some control. I want t low pass that allows me to shave off the top and just have the sub lows, so I use the BSS FDS 310 for that.

I also like to be able shave off the bottom to de-boomify the subs, so I use the high pass filters in the KT DN410. One side of the 410 allows me to EQ all the subs and the second side is just on the Rat Super Subs.

The Symetrix 501 compressor allows me tighten up the lows a bit. Since I use only subgroup compressors, the subwoofer sends from the kick, toms and bass are able to sneak out un compressed. The 501 solves that issue if I so desire.

I insert the EQ - x-over - comp chain on the subwoofer aux

In the lower rack is a pair of Meyer CP 10's. One is inserted on the entire PA left/right and I use to tune the room. The second is a KUDO modifier EQ that we use to fine tune the KUDO to sound as close to the K1 as possible.

The top BSS graphic is in series with the top CP10 and gives me a quick grab EQ that I use during the show. I have 250 and 2.5 K knobs pulled so I can Braille my way to the frequencies. Cause you know that I am a sound guy, not a lighting guy. Therefore I try to keep light to a minimum in my area and run in the darkness. The next BSS does a whole lot of nothing.

Moving over there is the archaic DBX RTA-1. I doubt there are many left surviving but I love it. It is truly the only RTA that actually looks like what I am hearing. All these new fangled laptop analyzer are quirky and jumpy. Plus, with a few flips to some setting, they can pretty much look any way you want them to. Which always leaves me with doubts and the fears of 'oh wait, the blah blah' is set wrong. This DBX thing is a no brainer, set gain, set decay to one of 4 choices and done. Simple pure easy confidence is what I seek, I want to glance and see a visual that has a strong correlation to what I am hearing, all that excess accuracy capabilities is useless to me during the show.

Next down is a pair of XTA 448's that I don't mess with but they control press feeds and Sub Vortex/Rat Super processing and sub delay times. We used the XTA for Vortex delays rather than the LA-8's because it was faster for testing. We may drop the XTA on Vortex after we settle into the shed's.

And then there is a Shure PSM 600 transmitter that allows me to go wireless with my headphones. I still primarily rely on the RTA, my ears and comparative reference points to tune the sound system. The wireless headphones allows me to tune the sound system to sound like the sound in the headphones while wandering around in the venue.

The Lab Gruppen power amp supplies juice to a pair of EAW MicroWedge 12's I run in passive mode as local listen wedges.

And finally, the clear com power supply.

**** End Sound Nerd Speak ****

And here is the full setup

You can never have enough bear spray at the sound board!

Dave Rat

Sitting at out first real show with full production after doing the listen wanders. All American Rejects were on stage and I had my first chance to get a solid idea of how the Sub Vortex system is working. Yes, Scott, Vortex is winning like 30 to zero so far. Whatever. Anyway, we are pretty happy with the setup. The diagonal fire focus is really effective but a bit too wide of an angle. Rear and stage side cancellation is substantial. I am going to do one change next show and run them the opposite directions as I am calculating much better aim and focusing deeper to the rear of the venue. The time alignment comes up much cleaner with B and C being identical in delay and D at about double.

Plus the cancellation s are better aimed to the side and rear and it eliminates the D to B cancellation aimed into the audience center. I realize that for you tech head types, my drawings are probably shockingly over simplified and lack all the fancy colors and such, but hey, this is how I figure the stuff out, so I am sharing the raw methods.

Here are the actual shortest distances from acoustic center to acoustic center. Though in reality some of the path lengths are altered by the cabinets being in the way.

Grabbing the two approximate primary distances of 3.6 feet and 6 feet and taking a look at the effect on cancellations we should see behing and stage side of the array

We can see excellent rejection in the 50 to 70 range for our B to A and C to A combos (50 is mid way between green and yellow but not shown). For our 6 foot DC and DA combos we see the polars below which offer more control to a lower frequency. The DB polars at 4 feet read somewhere in between these.

All in all we are seeing a good amount of cancellation and due to the various combos, it should be a well spread attenuation rather than concentrated in a narrow frequency range.

The Listening System

Moving on, check this out! We have four pairs of wireless transmitters/receivers with high quality omni lavaliere mics attached. These Sennheiser units are the same systems that video cameras use for wireless audio on transmission/reception and the receivers are the same units that are used for in ear systems. And while I am at it, and for some shameless self promotion, if you need any Sennheiser or any audio gear for that matter, give Daniella a shout at the Rat office and she will hook you up with great deal. Ha, tell her you are a friend of Dave Rat!

And Nick the Fly with the mics and transmitters.

We can place these at various locations in the venue. Though the mics are not perfectly flat in response, they are close. Since the data I am looking for is simple frequency response, we have the four mics and a hardwired RTA mic all run into console channels. We have calibrated by placing them next to each other and set gains so they all read the same sensitivity. So now I can PFL any of the mics and see the response of that mic on the RTA. I do not really care if the read out is flat, what matters is that the mics give me an RTA reading that looks like RTA reading from the reference mic at FOH mix position.

So now, very simply I can see on the RTA and hear in my headphones various locations during setup and sound check and we don't have to run a bunch of stupid mic cables all over the place. So far we have not built housings for the transmitter so that they can live in the audience during the show, but we are pondering a method.

These reference mics give us the power to quickly figure out if the sub Vortex system is working as desired, are totally wireless and easily transmit the distances we are dealing with.

Oh, and just for the heck of it, here is a link to the SB28 owners manual.

http://www.l-acoustics.com/manuels/SB28_UM_ML_1.0.pdf

**** End Sound Nerd Speak ****

Hmmm, did I mention that the drum riser flies? And spins, and tilts and Travis rocks the house in a huge way. Really cool to see and I get to push those subs right on up to vision blur mode! Check out this sexy setup!

And to further soften the landing from all the heady sound nerd world, this is my shorty Sammy

This here would be my other shorty, Maddie and the cookie we made. Why make a bunch of little ones when you can make one huge one. Go big!

And hey, there Taco!

Nick the fly, me and hey, my dad, say hello papa Rat!

My friend for over 35 years, say hey to Brian Rat who started the company with me. We did a bit of surfing at San Onofre before I left.

Don't mess with Taco! He is my guard blog.

Next up, lasers and perhaps a new name suggestion has been put forward for the Vortex. This one may be a hard one to beat!

Dave Rat