Ampeg SVT-7 is pooping out on me! Master only 12:00

OhulahanBass · #1 06-23-2010, 02:45 PM

Can I fix it or should I return it?

I gigged it the day after I bought it, it was loud! Blew my RH450 out of the water in volume and hifi frequency. We gigged loud and twice the amp cut out on me. I thought, maybe the patch cables... got new cables and it was fine for 2 weeks. Then at a loud rehearsal it did it again. So today I tested it with just a drummer. with gain down, comp off, it just simply goes out when ever I dig in real hard or slap real fast. Even with gain at 11:00 and master at 12:00. My bass is hot but I back it off and use the -15db pad.

I know at least one other TBer had this problem. Thoughts? advice?

scottbass · #2 06-23-2010, 02:56 PM

What impedance cabinet(s) are you using? 8 ohms, 4 ohms, or some combination?

Sorry, I don't have an answer to your question, but I am very interested because I am considering buying an SVT-7 myself. I definitely need to know how robustly they perform with a 4-ohm load.

I have heard the GENERAL criticism that Class D power amps - like the one in the SVT-7 - are more prone to limit/protect/cutting out issues. It seems there might be some truth to that.

Warrior_Bass · #3 06-23-2010, 02:56 PM

The power transformer of my GK2001RB blew, and I had it replaced. Once replaced, I had a similar problem as you. After taking it to a different shop, they told me that the previous tech didn't solder the power terminals very well, so when I really dug in, the amp couldn't push enough current, and so it shut off. Perhaps you have a similar problem.

OhulahanBass · #4 06-23-2010, 03:11 PM

Hmmm, weak conections limiting current.. could be, they are made overseas.

I am running it at 4ohms, 2 cabs at 8ohms in parallel.

Phantasm · #5 06-23-2010, 06:29 PM

Where do you have the compressor set?

Can your cabs handle 1000W?

Jerrold Tiers · #6 06-23-2010, 09:37 PM

Quote:

Originally Posted by Warrior_Bass

The power transformer of my GK2001RB blew, and I had it replaced. Once replaced, I had a similar problem as you. After taking it to a different shop, they told me that the previous tech didn't solder the power terminals very well, so when I really dug in, the amp couldn't push enough current, and so it shut off. Perhaps you have a similar problem.

Sounds suspect.... unless he MISSED soldering some. That would shut off some of the power 100%.

High resistance connections would get burnt.... or would re-solder themselves..... or both.

Funkinthetrunk · #7 06-23-2010, 09:41 PM

Quote:

Originally Posted by OhulahanBass

Can I fix it or should I return it?

I gigged it the day after I bought it, it was loud! Blew my RH450 out of the water in volume and hifi frequency. We gigged loud and twice the amp cut out on me. I thought, maybe the patch cables... got new cables and it was fine for 2 weeks. Then at a loud rehearsal it did it again. So today I tested it with just a drummer. with gain down, comp off, it just simply goes out when ever I dig in real hard or slap real fast. Even with gain at 11:00 and master at 12:00. My bass is hot but I back it off and use the -15db pad.

I know at least one other TBer had this problem. Thoughts? advice?

Not worth the trouble if you can return it....Return it ASAP.

**jmattbassplaya** · #8 06-23-2010, 09:43 PM

Return it. These SVT-7s seem to be having a lot of issues currently. I`d wait for the next gen if you really like the amp.

svtb15 · #9 06-23-2010, 09:48 PM

Does anyone have an inside under the hood pictures to post on the Amp Guts thread?

OhulahanBass · #10 06-25-2010, 07:05 AM

nope, this amp has been returned