Dave Rat Blog – New Adventures

Well it sure was nice to be home for the holidays, too nice in fact. Leaving home gets harder each time and so very soon all my travels will be purely in my control rather than an emailed itinerary.

In the mean time, the new SDS30 SuperSubs did their first show. A 16 box set up with 8 on each side in cardioid arrays. I kept them very tame for the show as the last thing I want is to overwhelm or distract from the primary goal of connecting the artist with audience.

Over the course of this leg I will slowly open them up in both level and bandwidth doing my best to only make forward steps.

A few aspects of the sound were readily apparent. First is that these subs go low, really low, in fact so low that I had to high pass them as not to overwhelm with frequencies below 30hz. Definitely will need to develop some techniques to manage and harness the extra energy.

Secondly, they are fast, like hard hitting punchy fast. At first this punchy fast sound threw me off and I will need to refine managing that as well. The kick jumps out in ways I have not heard since mixing on horn loaded subs yet without the low frequency limitations and pesky sound peaks that plague those horn designs.  Also the box resonance is so low that either I high-passed above it or its so subdued that it’s a non issue. Beyond messing with the high and low pass filters, I used no external EQ. Typically dialing in sub EQ is one of the more challenging aspects I face in tuning a system.

All that said I wisdom of years of building and testing new systems tells me that initial impressions rarely tell the whole story for better or worse.

It was a busy day and had a lot going on and spaced grabbing pics of the arrays but here they are coming off the truck.

Specs and more details soon. If you want us to email you info as it comes out, he is a link to give us your info.

SDS30 SuperSubs More Info Signup

Cool cool and fun with big loud toys!

Glasgow Show Day

Well hello my little comrade. Happy little guy found a present.

Many years ago I had a pet squirrel named Tibet. She wod follow me around the house, if I tapped my chest she clamor up my leg and hop on my shoulder. Sometimes if I sat on the floor she would run circles around me and roll on her back showing her long scary teeth Acting like she would bite me, but just ever so gentle play bites before leaping in the air and circling again.

Show 2 at o2 London arena went well as well. Second shows always have a bit of an advantage sound wise from the fine tuning of the first night. We actually return for a 3rd night  days and three cities later

My bus avoidance adventures continue and after the gig I stayed back in London for the day off with Kim and up early for a 4 hour show day train ride to Glasgow. 

Since I did not spend my life traveling the world in order to embrace a lack of experiences, guess what I chose for dinner tonight?

Once again the the Brompton makes a spare hour unwasted.

I try and offer a sonic tidbit of advice with each blog post so for for today I will share some insight into getting and maintaining gigs. 

What we are selling as sound sound engineers is not really a perfect show, npr is it technical complexity. The shows will never be perfect, they will only be at most, the best that can be done with the given challenges at hand. Ultimately whether you have a crazy complicated setup that requires tons of work or a simple one that is nearly auto pilot, makes no difference to the audience, the band, management or show reciewers.

What we sell is confidence. Confidence that when the band walks on stage that they do not need to worry that their sound will be delivered. Confidence that best will be done to connect the artists with the audience and to the listener what matters is that they have an experience they can feel. That for those few hours, the world fades away and they can immerse in the moment.

Confidence is built on trust and and held by delivering consistently over time.

And now we are mid set change so it’s time to refocus on mixing a rock show.


London O2 Show 1

Back on tour after an amazing 10 days at home. Surfed nearly every other day between catching up on Rat stuff and remembering there is more to life than go go go.

So I am mixing the Peppers’ o2 show, I come out hot, at 108 and slowly fade down to the 103 A weighted I usually mix at by slowly fading over the first two songs. London, Los Angeles and New York are high pressure gigs. Not so much for me directly but the audiences tend to be more discerning combined with management, band friends and all the heavyweights hovering filled with more angst than I feel. The mix comes up as it has most every show for quite a while now. The instruments are all there and I am focused on tonally compensating for room temp. A few songs in.I turn around and this guy in the FOH mix area looks like he has to tell me the secret of the universe. I walk over and he says, “what’s up with the high hat?” 
I am thinking, “The high hat?” We are doing the O2, the vocals are right on top, the subs are clear, the guitar is on fire, Flea is defined and strong. All the drums churning out with power and this guy is stressing on the high hat like it’s the end of the world. Kashisst Kashisst, the high is crisp, defined and if anything a bit bright. WTF? It’s like the reincarnation of cowbell guy. I figure he is a band friend but damn,  I ask him if his hearing is flawed, how can he not hear? Kind of a bummer, two songs of being a bit self conscience and right back into an awesome show.

After the show I went and hunted down high hat guy, turns out he was nice enough, I guess he got a bit excited with having an opinion of perceived importance. To bad it wasn’t more cowbell he wanted..

And while we are at the rock show, we have BabyMetal opening and it is delightful. White faced demons and toy doll pony tails in catering can’t help but make everyone smile. This is the way like should always be.

The tour bike adventures continue with a refreshing 13 miles after the gig through the streets of London  such a wonderful contrast to loud music and the thrill of the gig to fly down dark streets icy cool air and the feeling of freedom.

As far as sound tidbit of the day, I guess I will finish off my 3 key pieces of gear. I covered the Dorrough 1200B and the PCM60.

So let’s cover the eventide H3500. I like this unit because it not only can cover all my dedicated effect patches but also because I can punch the programs in directly on the keypad.  I the 3500 for the vocal delays on Sir Psycho and Higher Ground, the guitar pan for Blood Sugar, the phaser effect on Dani California, some vocal flange for Under the Bridge, vocal reverb flange for Could Have Lied and a few other patches I can’t think of at the moment.

By using just one unit for all the non PCM60 effects, it keeps the mix clean and defined and prevents piling a bunch of messy crap on to the band. I pretty muc focus on being an absolute minimalist. My job is to connect the artist with the audience.  Not to distract.

Cool cool and now I must mix London o2 #2


DR Blog, Here They Come! 

It’s been nearly 2 years in development, from the four prototype versions I hand built in my garage, transferring my handcrafted designs to 3D data to bringing the contract manufacturer up to speed. The environmental tests, cosmetics, covers, caster plate designs and finally the first batch is enroute. 

Soon will have spec sheets and more info.

I actually have been developing this specific subwoofer design concept for over 12 years now and here is a picture of a 15″ version that I use as my home stereo subwoofer.

They have come a long way and when we release more info it should explain why this specific design offers some distinct advantages

Happy Thanksgiving and I am so happy the be home for 10 days.

Yay C-street surfing, yay family, yay pups yay Rat family, yay friends.  Not necessarily in that exact order but yay all!


DR Blog – Vienna and Home

Last show of euro arena leg 4 and the wrestling matches have rejuvenated a bit of the old comraderie from years past. I have been spending more time around the dressing room the last few days with my long time friends. I tend to run fairly isolated from the tour and the Trump election had pushed me further into being a hermit.

It’s now 2 am and just back at the hotel with 5 hours to my plane takes off, it’s all about being really good at setting alarms and timing finesse.

We said goodbye to Deerhoof and pick up Babymetal as the new opener on the next run early December.

So here I lay not as tired as I wish I was with my ears slightly ringing as they do. . Plus I have the added bonus of a bunch of new aches from wrestling.  I must admit I kind of enjoy the feeling of being human and taking some hits from exposure. Otherwise things would get boring much quicker.

Speaking of ears ringing, many people ask me how I deal with ear protection.

My strategy has evolved over the years from reckless bombardment to moderating. Years ago when mixing Rage Against the Machine, my ears hurt and I had not yet developed a strategy to hold a mix together and reduce my exposure at high volumes. 

As wisdom grows worked out a strategy wherein I triangulate the tonal balance of the sound. I use the RTA for a visual reference, the knob settings as a mechanical reference my ears as an auditory reference for the first few songs and a few other times during the show. The rest of the time I use some 20db soft silicon ear plugs I got custom molded from JH Audio that work really well for me. I put them in, let my ears adjust to the lower level and mix most of the show that way.

Ok, should try and sleep. good night


Oh, found the boiler room

DR blog – Festhalle Frankfurt

Just to give you an idea of what what kind of audio challenges we sometimes face, give a listen to this cable ramp drop

cable ramp drop

Today is the day of the Peppers wrestling match, they brought in a mat, set it up in the middle of the venue, multiple cameras and up on the big screens. 

Match 1 was two of our fabulous caterers Tanya and Vicky

Match 2 was band photog Dave vs guitar tech Ian

Match 3 Lampi Scott vs me, Dave Rat

And match 4 tour Manager assist and guest bass player Sammy vs Flea

Must admit I was nervous but it truly was great fun, here is a clip from Flea’s match on Instagram 

flea vs sammy

And here is a shot of Scott and I

Cool cool, moving on to the bigger picture.

On November 26th 2006 I was in this same room with this same band pondering the same worldly things but from a much safer distance of time and residency.

And it was a bit eerie reading what I wrote a decade ago given the current realities

Roadies in the Midst Blog, Frankfurt, Nov 27 2006.

And may as well take the same pic I did back then.

On the sound front, the new Rat SDS30 SuperSubs are moving through production and the first batch should be landing at the rat shop in a few weeks. 30″ cone, 10,000 watts self powered and should be quite impressive to hear a whole array of them.

This enough for now, time to wander as I am now in Vienna


DR Blog – Hannover and Frankfurt

So the initial shock and disgust of facing the election results is slowly fading into accepting what I already knew about human nature. And not unlike nature nature, Trump is reminiscent of an invasive species like kudzu for which our political system has not yet developed a defence mechanism. 

Personally to help me sleep and do my part, I have arranged monthly donations to the ACLU to help fend off Trump’s stated attacks on civil liberties as well as other organizations that he states his policies intend to undermine. Join me, let’s try and minimize the collateral damage and reverse the process into a better direction.

Moving over to sound world, let’s take a look at the RTA I use to see the sound that the audience hears during the show.

So for me, this photo from the show in Hannover is pretty darn close to what I am looking for. What I seek is a very smooth falling response losing 3 to 5 db per octave as you go up in frequency.

In smaller rooms, the slope is more gentle and in big rooms when I am far away from the PA I look for a steeper slope.

Please note that this is not the response using pink noise. The is the response of the actual band playing measured from a mic at FOH and the RTA is set to “infinity” time averaging.  I then allow it to average over the course of half a song or even several songs.

My goal is to look at the averaged frequency response of the sonic energy that I am exposing the audience to, over time. I really want to avoid exposure to narrow band peaks over any thing beyond short time frames.

There is a bit of a bump in the 1k to 5k region, this is not ideal but since it happens smoothly over several octaves and is just a few db, it is not a major concern.

One of the challenges is that this curve will constantly change with venue temperature, audience size and location. so if you ever watch me mix, you will see me trying to lock in the curve as the show starts and then chase EQ gremlins as they show up throughout the night.

Doing winter shows means we can experience some pretty drastic temp changes, very quickly depending on the roof design and entry and exit door usage.

Did my first and second bus ride of this tour leg getting in and out of Herning Denmark. The train schedules were just too cumbersome. 

I’ve been train to take candidate shots of everyone on the tour and at some point put some posts on each department. What seemed a reasonable plan is proving quite the challenge though.

And some pics while biking around.

Ok, sleep and show tomorrow Frankfurt


DR blog – Cologne

Jumped in the merch van again for the overnight ride from Luxemburg into a bit of a slow one meal day with a short ride around town.

I like it here, nearly always stay out near the Dom. Since we have two days off will save adventuring for tomorrow.

I must admit the election has left me feeling sad and depressed. A helpless frustration and realization that perhaps believing in honesty, integrity and compassion is just for fools as selfish greed and divisiveness is how the real winners roll. Create scapegoats and unify the masses and we are living in animal farm.

Oh well, I don’t like like it and don’t have any belief it will ever cease to be common. I guess at the end of the day I just need to have made the decisions that help me sleep at night with the feeling I did my best to do what’s right.

Ok, enough about my reality, let’s move onto audio. So the second unit in the photo is a Lexicon PCM60. Must have been the late 80’s when I bought the first one. It was a budget buster at the time and was a replacement for this horrible sounding Yamaha R1000 reverb we were using.

As the years past, I have switched to numerous other units but I could never get the sound I was seeking.

In a reverb unit for live, I rarely am looking for a realistic sound as a realistic reverb just puts the instrument in a different room. Rather I am looking to extend the time duration of an instrument or vocal. Yes I want it to sound farther away but really I seek a texture that is different than the room sound. If the reverb is really clean and realistic, I find I need to add a lot for it to be audible or have an impact. Adding a lot if reverb is counter productive for most large live shows.

Rather I want it to be as audience as possible using as little as possible.

In general I use very few effects and for peppers, all effects I do are on just 2 units. A few effects, like the vocoder on By the Way and vocal effect for Monarchy are created on stage by Chris Warren or monitor Mark respectively.

Keep in mind there is no right or wrong with effects, just choices that have a higher probability of giving you the outcome you desire. I’m just sharing what works for me.

So, the PCM60 has 4 room sizes, 4 decay times, a plate or room option and a low and high cut option all on mechanical buttons.

I find that I can get every verb sound I desire from a short sharp gated sound to a long dreamy wash just by punching a few buttons. Plus, a quick glance tells me exactly where I am set.

The real secret to the PCM60 though is in the input section. I discovered this year’s later when using a PCM90 that had a PCM60 emulator setting. Try as a may I could never get the sound I was looking for. Finally after going back to an actual PCM60, I discovered the secret.

The input section on a PCM60 when driven hard into clip has the most wonderful thick distorted sound when overloaded. Turns out that the reverb sound I crave is created when the snare or toms clip the input adding a crunch to the drum sound being sent to the reverb.

The reverb sound created can be altered by how much i overload the input and I can create the big thick crunchy verbs and add them back to the mix at very low levels. This allows me to get the sound I want without losing the clear, up close and personal sound I try and deliver to the audience.

Cool cool, that’s enough for now, a few pics and gonna publish without proof reading again, so please forgive any errors.

The open road, at night in the dark


Luxembourg Show Day


“Never ever forget that no matter how good or bad it is, it can always get worse.” That is the happy thought that keeps running through my mind. A friend asked me today “What do we do? I have never felt more alienated, the country will be controlled by people that hate me, what do I tell my kids? There must be something smart I can do, I don’t know what to do.” And I am so sad to say I just don’t know either, other than support the ACLU and organizations dedicated to fighting for our rights. What I do know is that the more active and unified people are, the higher probability they will get the outcome they desire. In the meantime regardless of which side of the equation you are on, people voted to break the system so hang on tight because a broken system is painful, rough and miserable ride for everyone.


Moving on happier places, I made it back to the bike shop in Amsterdam and met Vincent who turned out to super cool. Not only did I hang out for several hours at the shop 2 days in a row, I bought a brand new Brompton 6 speed black edition and he and some friends came and hung out with me at the show. Meeting wonderful people really does make everything a bit better.


Oh, anyone is curious about following my bike adventures, my profile name on the Strava App is cryptically Dave Rat. And before we get into some sound stuff, here are few pics riding from Luxembourg hotel to gig.


And at near freezing out I stop to warm my hands almost magically a little friend comes for a visit to offer a furry assist


I done 80 miles since monday and this how I roll


I stopped again to take a pic and my friend here lays down and shows me how he rolls


And on that note lets talk sound.

So here is a photo of three older pieces of gear that I rely heavily upon and I know of no alternatives that work nearly as well.  I will start with the top unit, the Dorrough 1200 today and cover the other two soon.


The Dorrough is a stereo metering unit with 40 LEDs, a 1db resolution and master attenuator offering a 100db range.  Additionally, the meters simultaneously show averaged and peak audio levels. Having this extremely accurate metering on my stereo cue bus allows me not only match left and right levels but also the difference between the peak and average levels allows me to see how much compression is effecting what ever I solo.

Another feature I rely upon is the sum/difference setting.  In this mode the left meter indicated the sum of the stereo signal I have cue’d and the right meter shows the difference between the signals. This is a powerful tool for determining if two mics mic’ing the same source are in or out of polarity. Also, the meter will help indicate how different two signals are. When two signals are identical, the sum meter reads a high level and the difference meter shows little to no level.  In order to reduce comb-filtering and increase stereo imaging, I try to send different signals to the left side and right side of the PA whenever possible, using the 1200 helps me optimize that goal.

OK, will cover why I really really like the PCM60 and H3500 in some future posts.

Oh, does anyone know what this thing is?  I passed it on the way to the gig pretty much in the middle of nowhere Luxembourg.