I bought it brand new. It's all packed up now ready to ship back so I don't want to mess around opening the unit. It did say rev C on the outer casing.... Obviously could have been different inside.
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Ampeg SVT 7 Pro Club
- Thread starter Verminaard
- Start date
As far as I know, the most common failure mode is a voltage regulator chip that's running right at or just over its tolerances for current and heat. That's certainly the chip that's blown on mine. You can replace the chip fairly easily, but it'll just do the same thing again eventually. The later revisions use a different chip with higher specs.
I've never been a huge Ampeg fan, so mine just sits gathering dust until I'm bored enough to repair it (my daily driver is a Mesa D-800+), but the 7 Pro IS a great amp, so I can't make myself sell or junk it.
Safest way to fix it permanently is to replace the entire main board with a newer one that has the proper engineering change level / revision.
My new 7Pro is “Rev H” got it from Zzounds, it was a scratch and dent, $100 off I couldn’t pass it up. Came in on Friday. Had practice today. I threw the 7Pro in my rack and hooked it up to my Furman PL Plus DMC power conditioner. Speakon into the Ampeg 810 and cranked away. It sounds fantastic! It doesn’t have the mid slicing ability or the broad tone spectrum of the 4Pro but it’s got a bit more punch and growl. I have the compression at 3/4, gain at 3/4, the bass in the middle, mids cranked all the way up, mid select on 1 and treble in the middle. Master was only 3/8 up. Thing is loud. The threshold LED was blazing the whole time but the peak/mute LED never blinked once. I was using my Fender Adam Clayton Jazz bass with Custom Shop 60s. The tone is exactly what I wanted. The Fender Rumble 800HD head which the 7Pro replaced will not be missed. It powered through 60min of heavy handed rock n roll without a whimper.
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You post reassures me a little since I didn't have the opportunity to push mine.
Yeah I had to “let er rip” just to see. My two old 7pros (1st editions) went belly up quickly. I hope REV-H holds up to the task
Let us know periodically how it's going, if you have time.
I have a Revision A case and put a Revision H board in some time ago.
We need to let others know if this amp is finally stable. IMO, it needs to prove itself.
The only amp I've been gigging since December 2017 is a SVT 7 Pro that I bought new and it hasn't had any issues whatsoever, but I do not push it volume-wise at all. I run the gain at around 2 o'clock and the master between 9 and 11 o'clock (normally closer to 9). REV C00 on the outside, REV H01 main board.
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The main concensus is revision H are totally safe. You seem to confirm this.
Well mine was newly sealed bought last week , so I'm taking an assumption it is revH? as they sell out quick here in Europe so would have been latest model. And mine played up :-(
New one inbound......so fingers crossed
New one inbound......so fingers crossed
Where did you order it from? Thomann?
Even if it's sealed it could be an old stock model. This implies a non revision H. But it's just an assumption.
Even if it's sealed it could be an old stock model. This implies a non revision H. But it's just an assumption.
I need some of you lights about the FX and PATCH inputs/outputs.
Am I rigth to assume the PATCH is the effect loop you can find in any amps that is between the preamp and the power section?
Then what the FX thing is for? I've read it's affected by all controls except the volume. Could I thgen assume it's before the preamp?
Am I rigth to assume the PATCH is the effect loop you can find in any amps that is between the preamp and the power section?
Then what the FX thing is for? I've read it's affected by all controls except the volume. Could I thgen assume it's before the preamp?
No the patch is the pre amp output, power amp input, for use with an external pre amp or power amp. The FX send return is for the FX knob on the front, before master volume. Did you read the manual?
I push the heck out of mine and it doesn’t miss a beat. Doesn’t get hot either. I remember my old ones would get hot as heck. This new one is hooked up to a nice power conditioner though.
Yes I did read the manual. However, you seem to confirm what I said about the patch being a "real" FX loop as it comes from the preamp and goes into the power amp. The FX thing seem to be another thing, yes controlled by the blend knob.
No, the patch is after the master volume, the fx loop is before, and has a blend as well. You can call it a real FX loop, but it’s the pre out, power amp in. I don’t think that’s the best place to insert fx.
What are you trying to achieve?
I agree, even if the Mesa M9 I owned a several years ago had the FX loop after the master.
Just trying to understand the differences and the topology between those to things.
Two loops, fx loop before the master volume. And pre out/power amp in patch, is post master volume. Typically the patch is for bypassing an internal pre or power amp, and not really used as a “loop”.
