Catch a 747
Trying to capture the energy, power and color of a flesh-and-blood, fire-breathing Marshall, is like trying to put a 747 in your living room.
You can stand in front of the amp and the raw power will make your hair stand up. But point a microphone at it and you will be surprised at how little of its character actually makes the trip to your recording.
Our plan is to figure out what amps, cabinet, mic combination sounds the best and once we get that nailed down, we will lay down guitar tracks like mad in assembly line fashion. We want to make sure that each time we record guitar we do the exact same thing, mic placement, eq,
compression, mixing the room and close mics and so on. Once we get a method that works in the mix, we can more or less cookie cutter everything and change guitars and amps to get different tones while still using the techniques we hammered out to capture the sound of the amp properly. In our previous guitar experiments, we tried all our collective amps in our growing amp farm, a ’67 Fender Bassman, two Marshall JCM800 Lead 50′s – one sounds drastically different from the other, a Soldano Hot Rod 50 XL, a ’72 Marshall Super Lead 100 and a Mesa-Boogie Mark IIB. It seemed no matter what amp we used, with the exception of the Boogie which sounded great, there was WAY too much distortion, and bad distortion. Even with the pre amp knobs on like one or two it was out of control. (Pre amps turned way down sound bad anyhow, they really choke the amp quite a bit.) Not quite Twisted Sister distortion but bad, tone-masking distortion. We noticed that in particular the Fender Bassman, while fairly clean, had a not so flattering distortion to it. This Bassman does not have a pre amp knob so the only way to adjust the gain is to mess with the master volume knob. The more you turn up the amp, the more unflattering the distortion became. OK fine, off to do some research, gotta be a way to fix that.
I (or Rob) found a web site for an amp mod kit company called Torres Engineering. They have a kit called “Bassman Magic” for $18 I believe it was. The description sounded good so I ordered it. What could it hurt right? Rob and I proceeded to put the kit in the amp, which was fairly easy once we identified the pre amp circuit in the amp from the schematic. He read the schematic and identified the resistor values in the kit while I endangered my life by soldering and clipping away unneeded caps and resistors. This amp was getting a haircut! As soon as we plugged the thing back in and gingerly flicked it on, the first thing we noticed is that neither Rob nor I got a jolt of electricity. Very good! We at least had not killed ourselves or I would not be writing this all too well. The second thing is, as soon as Rob hit a chord the amp screamed like a banshee. A high pitched moan that would not stop until we turned the amp off. That’s bad. I thought “oh well, way to ruin a perfectly good Bassman. Good thing we have other amps.” I called Torres the next day and amazingly I spoke to the legendary Dan Torres himself. I barely got the whole problem description out and he interrupted me.
Dan: “You have one of the rarest of the rare’s, a Bassman that is wired phase-reversed.” (I suspected this all along you know . . .) “Take the green and black wires going to the output jack and reverse them, should be fine.”
Your favorite skeptic: “Really? That’s it? Are you sure?”
Dan: “Yeah that’s it.”
I thanked him and hung up, absolutely positive I would be shipping that amp to him for extensive repairs, it could not possibly be that damn simple. Of course it was. All the while I’m soldering and putting the chassis back in, I’m thinking about if I have a box big enough and if I have enough bubble wrap for this amp to ship it to my new buddy Dan for repairs. But fear not! As soon as I switched the wires, re-soldered it, and tried it out, I proudly called Rob and told him the Bassman we “borrowed” from his friend was fixed! I got this amp mod shit down pat! It sounded great on the top end, a major improvement. But the lows were still fuzzy and loose. I hate fuzzy and loose. I don’t like amps like that either. I figured I’d call my new buddy Dan back and ask him about it. He had me get out the schematic from his kit and pointed out one capacitor to change to a different lesser value, assuring me the low end distortion would tighten up dramatically. I am now of course enamored with modding every single amp within reach. Even on Dan’s web site, he says that all the great guitars you hear and love on records are never stock amps, if it’s a Marshall or a Fender it is most likely heavily modded. Page, Townsend, Stevie Ray, Angus & Malcolm, Slash, Brian May, even KIX – all heavily modded amps. While I had Dan on the phone, I asked him if he had a kit to fix the way too distorted Marshalls we have. (The ’72 was OK, just a fix for the JCM800′s)
Dan: “You don’t need a kit, just swap out the pre amp tubes with lesser gain tubes.”
Your favorite skeptic with my well rehearsed line: “Really? That’s it? Are you sure?”
Dan: “Yep everybody does it.”
He directed me to a nice little chart on his web site that explains the whole thing. Very good, I’ve now been educated. I started thinking and while I was on a roll, I decided to call Soldano Tech Support and ask them about the Hot Rod 50, I had a question previously about a knob on the back of the amp that replaced one of the speaker outs, looked like a mod kit of some kind. (They had no idea, not a factory mod. I had to take a pic of the inside chassis and email it to them which I just did tonight) I asked a very nice helpful fellow named Bill if he had any suggestions on how to tame the wild ass distortion on the Soldano. (If you want to hear a killer Soldano, listen to the intro of “Lay it Down” by Ratt, MONSTER friggin’ guitar sound, a modded Soldano SLO 100) Nice distortion, very sweet and clear, but just way too much for what we want even on the lowest pre amp settings.
Bill: “Well, most people just swap out the pre amp tubes.”
Me now the world’s expert on this line: “Really? That’s it? Are you sure?”
Bill: “Yep.”
Me thinking I’m on Punked or something: “Do you know a guy named Dan? (just kidding on that one)
Bill: “Try a 12AT7, a 12AY7 then if it’s still too much try a 12AU7. Also, try replacing just the first stage pre amp tube, then replace the second stage with a 12AX7 back in the first position, then try replacing both tubes with the same lesser gain tube. See which one you like, try any combination of swapping out the two pre amp stages with different tubes and go with what sounds good.”
Me: “Bill, you freaking ROOOL!”
I ordered two of each tube (matched and balanced triodes) from thetubestore.com in the Great White North, told the guy on the phone to “take off, ay” and had the tubes the very next day. I spent about three hours by myself figuring out which tube combination worked the best in the Marshalls and the Soldano. Words of wisdom, let the tubes cool off a bit before touching them. In my infinite patience, I learned the same lesson over and over again! I just couldn’t wait to try the next thing looking for the perfect sound, singed fingertips and all! I ended up with a 12AY7 in the first stage of the Marshall and a 12AU7 in the first stage of the Soldano. Replacing both first and second stage pre amp tubes seemed to take the life out of the amp, it was a little too clean. “Bereft of life” as they say in the Parrot Sketch. So after all that, in our quest to shove the 747 through the front door and get “that sound” on our songs – last night we discovered the following in summary:
Marshall JCM800 Pre amp Tubes:
The stock 12AX7 is too mushy and dense for the kind of powerful rhythm sound we want. A Marshall JCM800 with a 12AY7 in the first stage pre amp section will reel in some of the unnecessary saturation and provide some head room. The 12AY7 hardens up the sound and adds the necessary dynamics to create the aggressive banging (READ: Townshend-like fury) that we want to hear in an FM recording.
The “magic” Settings:
A technique we have found that really goes a long way toward achieving the sound we want is – Turn the Master volume up to at least 8. If your neighbors are not as far away as mine, get a Marshall Power Brake. Turn the pre amp up to about 6. Now turn the guitar DOWN to anywhere between 6 and 8. CHA-FREAKIN’-CHING. SOme pickups sound fine wide open, but not what we have on these guitars. It is the only way to get a powerful, clean, and lively sound. It defies logic. Turning the guitar down just seems like the worst thing you could do but the combination of cranking the amp way up and turning the guitar down a little is the key. You have all this uncontrollable, awful sounding distortion at your fingertips but don’t go there keep around 7 or so, (to taste of course) and BANG away. It is good. If you’re thinking of trying this in the privacy of your own living room, keep in mind it does not work unless you jack the Master volume up to 8 or more. Don’t worry a JCM800 reaches full volume at about 2 – from there it just gets better, not louder. Also, a warning to you – if you’ve never had a 747 in your living room, don’t forget to secure all breakable items with duct tape before you fire the thing up. Luckily I have nothing in my basement. The pics you see at the left were from an earlier session when we were working on eq’s. The basement sounds way better than the family room. And my dogs are not scared with the amps in the basement.
We tried the Soldano briefly and while it sounded great, but alas, nothing sounds like a Marshall, so we easily talked ourselves into that.
Equalization:
One of the things we had done before on a previous test session was to try to get the EQ right on the way in. Most people will say don’t eq too much on the way in, you’ll not be able to undo anything later. I agree on drums but I disagree on guitar and bass, you can easily re-record the takes if you ruin them with eq. I feel this way especially since the VS-2480 eq’s are not very versatile. That is probably the only two complaints I have about that machine, the eq’s kind of suck and it’s difficult to patch in outboard gear, no channel inserts. The 2480 has a built in analyzer so I figured I’d use that to compare how the sounds we were getting from the mics and the Palmer Speaker Simulator was compared to a commercial recording. So what did we choose? I took the intro to “Highway to Hell” made a long repeating 15 second .wav file out of it and played it looped through the analyzer to “see” what it sounded like. Rob and I spent a few hours a couple of weeks ago creating eq curves on some outboard digital eq’s I have (Behringer DSP-2496 Ultra-Curve Pro’s – GREAT eq’s for the money, very quiet and you can stack a 10-band parametric on top of the 31-band graphic eq digitally with the units internal routing) and fortunately remembered to actually save the settings. What we did was play the “Highway” loop, use the analyzer’s peak stop function to give us a target line and then Rob would play the same riff and we’d see where our sound was compared to “Highway”, making eq adjustments until our peak stop curve was really close to the “Highway” guitar sound.
It seems if you DON’T do this, the raw guitar sound you get through the mics is such a wide spectrum sound that you’ll cancel out the low mids in the bass and some of the snare frequencies. That’s going to be a muddy mix I can assure you.
Mic Placement:
Since we were confident with our eq settings from previous test sessions, we started working on mic placement. You always hear about engineers jamming the old reliable SM57 into the grill cloth, usually at an angle and then setting up a room mic. We were using a Marshall cabinet with Celestion Vintage 30′s in it and we wanted to find the sweet spot mic placement for the Marshall. I stayed upstairs in the control room while Rob took some headphones down to the basement and plugged into the snake. We have the amp farm in the control room so we can tweak the knobs easily and have a 100 foot speaker cable run down to the basement connected to the cabinet. The plan was for me to play while Rob moved the mic around the speaker cabinet until we found “the spot.” We setup an SM57, a Sennheiser MD421 and an AT-4040 large diaphragm condenser mic. We found a good spot on the cab after about 20 minutes of messing around with the SM57, it ended up being about an inch from the grill cloth at about a 45 degree angle pointed halfway between the dust cap and the outside edge of the cone. (Sounds vaguely familiar – only the same exact position in every single thing you read about guitar mic placement! Fucking duh!) Then we worked on the room mics. Rob walked around while I played and found two spots that sounded good to his ear. The Sennheiser was about 20 feet away but slightly off to the left of the direction the cabinet was pointed. Out of the direct line of fire, it seems to give the sound a chance to bloom a little before picking it up. He said it sounded hard and sandy when you stood directly in front of the cabinet. He put the mic at ear level. Same thing for the AT-4040 but we didn’t end up using that mic at all the other two sounded so perfect.
The idea was to mix those two mics down to one track and on the other track for that guitar, we used the Palmer PDI-03 Speaker Simulator and mixed the summed mic track and the Palmer track to taste. We used the JCM800 as described above and my old ’78 Les Paul. We really believe after all this prep work, we’ve nailed a killer guitar sound. Rob played on two songs and we made some CD’s and we were done. He called me on his way home and raved about how much he thought finally the sound we have sounds like what he thinks HIS guitar sounds like. We were both quite happy with it still today, the next day is always the litmus test.
Now that we have a method down for a clean guitar with the Boogie and/or Bassman amp and a dirty guitar with the Marshalls and Soldano, and we have our eq and mic placement down, we’ll start burning through the six songs that Jimmy laid the drums down for over the weekend and next week. We’re thrilled that since we have everything set, no matter who plays what track, Dean or Rob, clean or dirty, we already spent hours and hours getting sounds, we just adjust everything to what we wrote down and go.
Here’s the signal path for the tech heads:
Rob’s brain -> Rob’s hands -> Les Paul with 10′s on it -> Marshall JCM800 -> Speaker out to Palmer PDI-03 -> Speaker through to cabinet -> SM57 close mic, MD-421 room mic -> both mics to separate Presonus MP-20 Mic pre’s -> Behringer Ultra-Curve Pro eq dual mono mode -> 2 Empirical Labs Distressors, 10:1 Opto mode Attack on 3 Release on 5 -> two inputs mixed
to one track on VS-2480
Palmer PDI-03 XLR out -> Presonus MP-20 mic pre -> Behringer Ultra-Curve Pro -> Drawmer compressor, 4:1 attack on 15 ms release on 500 ms -> one track on the VS-2480.
BTW – a couple of paragraphs in this edition are from an email Rob sent me the day after our outstanding success, gotta give credit where credit is due. I don’t make up all the funny shitchya-no.
I’ll be checking back soon – Mark



