Guitarists - Bassists: Let's talk preamps!

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bassist_25
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Guitarists - Bassists: Let's talk preamps!

Post by bassist_25 »

I am a preamp junky. If I could have a 10-space rack full of nothing but preamps, I would. I like the ability to customize my preamp and power section to match whatever cabinet configuration I want to use. It makes upgrading/customizing so much easier. I'm not against having a self-contained head - if someone were to say, "Hey, I'll sell you this Eden WT800/Aguilar DB750/Carvin B1500/Mesa 400+/Sunn 300T/Kustom Groovebass for $300," I wouldn't turn them down :D - but I think that I'll be using seperate components for quite a well. I like head room, and I find that most self-contained heads just don't have the wattage I'm looking for.

Anyways, I'm currently using a BBE B-max (the solid state version) in my rack. I'm very happy with it, and plan on using it for quite a while. Unlike most bells and whistles, which are usually useless, the two "extras" on the preamp - a basic compressor and what BBE is best known for, a Sonic Maximizer - are great. I find that the Sonic Maximizer really helps me dial in a tone that sounds good to my ears. The EQ section takes a little getting use to: there is no "flat" setting on the parametric. The bass and treble controls are boosts and the treble is a cut. That's not to say you can't get a flat setting with the unit, but it's not as easy as turning everything to 12 o'clock. There is a dedicated para-mids also. I usually don't touch the basic parametric EQ from gig to gig, but instead tweak to the room with the para-mids section and Sonic Maximizer. As I said in another thread, I usually add presence with my cabinet's horn, rather than EQ it in with the preamp. My bass has a lot of brightness in its natural timbre, and EQing in what the cab colors out may make things sound too bright front of house.

The unit is very hifi and quick sounding. Compared to the SansAmp RBI (which is in the same price-range), it's more modern-sounding. The SansAmp is more SVT-like, and the BBE is more SWR-like. Of course, the SansAmp can add a lot of dirt and grit to your sound, which the BBE can't. The SansAmp is also a bit more versatile. I've been thinking of maybe getting the pedal version of the SansAmp to run in front of the BBE. I've also considered getting the rack-mounted RBI version, and using a switching system to go between the two preamps. I normally wouldn't use the dirty sound, but there are a few songs I wouldn't mind having it for.

There are a few features that I wish the BBE had. The first is I wish it had an XLR out for the power amp. It's not a big gripe, but it was a little bit of a pain to balance the impedance from the preamp's 1/4 inch output to my Crown's XLR inputs. Also, the volume control works for both the balanced and unbalanced outputs. Again, this isn't a big gripe, but I wish that both outputs had their own dedicated level controls. I may want a lot of volume up on stage, but then the soundman may be getting pummeled by an extremly hot signal back at the desk. I usually control my stage volume with the power amp's gain, but I still think that two level controls would be a good idea. Lastly, the unit's DI is post-EQ, no if, ands, or buts. I think that a pre-eq/post-eq button would be a very good idea. Some sound guys understandly want to work with a flat uncolored signal. Why use a DI box if you don't have to?

I'll probaly eventually upgrade. I think that I'd like to either go with an SWR Interstellar Overdrive (or Grand Prix, since they can be had on Ebay so cheap) or a Demeter. I definatly think I want something with a tube in it to warm up the sound. Still to this day, my favorite preamp that I ever played through is an Alembic F-1X. Those things are just so creamy sounding. They're fat but still defined. I don't know why Alembic would ever discontinue them.

Anways, I've rambled enough (I don't know what to do with all this time on my hands since I'm on spring break), so guitar players and bass players, what are your favorite preamps? What preamps are you using? What power amps are you using with them?
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Post by lonewolf »

My philosophy about preamps is that if they don't have midi switching with 100 or so programs, you may as well just buy the amplifier version. Because of this, my experience is limited to midi preamps only.

In the era before the Boss GT-8, I liked the Marshall JMP-1 and an old ADA MP-1 that I modded coming in a close 2nd. I didn't care much for any of the other midi pre's, including the incredibly overpriced M/B Triaxis.

{stands up, addresses peer group} Hi, I'm Jeff and its been one week since I am completely Mesa/Boogie free for the 1st time in over 20 years. :lol:

The digital/modeling preamps were not worth mentioning until...

Then came the Boss GT-8/Pro. You have to play thru one of these to believe it. Feels like tube...sometimes feels better than tube?? You can dial up any popular amp ever made and tweak it to respond better than the original. The Marshall models are excellent and they added a JCM2000 model which plays better than my JCM2000 tube amp. The Fender Twin clean model sounds just like the original, but the pick response is much smoother with almost no pick resistance. The acoustic simulator turns a Flying V into a Martin D28. Gotta try one.
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old Skool
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Post by old Skool »

Just curious lonewolf, what was it about the Triaxis that you didn't like? I still have my old ADA MP-1 sitting around & wish I could find someone to fix it for less than an arm & a leg (the level drops off after it's been on for a little while). It wasn't the greatest preamp but did a pretty good job. One of the best sounding rigs I've heard belongs to a friend of mine. He's using Soldano, Bogner and Boogie preamps & some tc electronics processors running through a custom router and into two VHT power amps. This thing is just killer. Of course there's a ton of money invested over many years but still very impressive. I really like my Sansamp PSA-1. Very versatile and clean. Someday I want to add a second preamp to thicken things up a bit. Yeah, not only an Axaholic but a Gearaholic as well!
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Post by lonewolf »

On the Ada, its probably the LF412 op amp (U4) causing a thermal problem. Clearing that area and replacing U4 with a TL072 opamp usually does the trick. I think I still have a few of those...I'll let you know.

As for the Triaxis. #1: $1899 list? $1200 used? Way too much because...

Boogies make great amps, but there is nothing sonically unique about the Triaxis. Most of the voicings are good quality but just different shades of the same gray. There was only one overdrive that I really liked, but at higher volume levels, it turned into a feedback generator. They also wasted too much circuit on clean channels. Most of the tone and gain controls only had settings from 0 to 10 in increments of one. Far too coarse to do serious tweaking. The FX send was also horrendous because the send level is simply the master volume. It needs a separate control for FX send. Aside from all that...the damn thing was deeper than my full size SKB rack!

They just tried to do too much. Instead of building 6 different circuits inside 1 rack space, Boogie should try something along the lines of a Marshall JMP-1 or MP-1 with a 2 or 3 tube circuit.

A nicely modded MP-1 kicks all their asses!
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Post by lonewolf »

I have an extra TL072 opamp. If you want to bring the ADA over here, I will swap it out and see if that takes care of the problem. It is a factory recommended fix that minimizes some noise while taking care of the thermal problem.

I also found some other recommended parts for an MP1 mod that minimizes noise, tightens the tone and increases gain. Swap out some caps here, a few resistors there and BAM:

http://rockpage.net/phpbb2/viewtopic.php?t=4530
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old Skool
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Post by old Skool »

Cool man, yeah I'll get it to you somehow. I read about the mod you did & was wondering if you'd be interested in doing that too (providing the thing can be repaired)? I'd like to get a little warmer, tighter bottom end out of it & it sounds like the mod you did would take care of that. I've heard a lot of good things about modded MP-1's. What do you think of the 3 tube mod? I thought if you could squeeze just a little more out of the two tubes the third really wasn't needed. Side note: I laughed when I read the post about the mod you did. That MP-1 you bought from JTRulz was the one I borrowed when mine went down. Man that thing was beat but it got the job done. My MP-1 still pretty much looks the same as the day I bought it new. Thanks!
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Post by lonewolf »

If you can, stop at an electronics store and get one of these:

8-pin DIP socket

This is an empty socket that holds the chip. It will hold the chip away from the board where it can cool easier. I am out of them.
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