moonbass Posted June 11, 2012 Share Posted June 11, 2012 Played through an Ampeg SVT 4 in the studio yesterday, and ended up changing back to my own rig because the DI out, although a great tone, had a horrible hum on it. I've had this before on several amps and it was solved with a ground lift switch, but the SVT doesn't have one. Just wondered if this is a problem with all Ampegs or if it's just this one? Quote Link to comment Share on other sites More sharing options...
EskimoBassist Posted June 11, 2012 Share Posted June 11, 2012 Not been a problem for me with my Ampeg Combo, and it's just a solid state jobby. Quote Link to comment Share on other sites More sharing options...
Lozz196 Posted June 11, 2012 Share Posted June 11, 2012 I did a lot of recording with my old PF500, and the guy who runs the studio never mentioned anything to me re this issue, so have to assume mine was ok. Quote Link to comment Share on other sites More sharing options...
chris_b Posted June 11, 2012 Share Posted June 11, 2012 My SVT3PRO's DI was fine. Ampegs all have noisy fans though. Quote Link to comment Share on other sites More sharing options...
flyfisher Posted June 11, 2012 Share Posted June 11, 2012 [quote name='EskimoBassist' timestamp='1339446891' post='1688741'] Not been a problem for me with my Ampeg Combo, and it's just a solid state jobby. [/quote] Ditto. Could it be a cable problem? Quote Link to comment Share on other sites More sharing options...
moonbass Posted June 12, 2012 Author Share Posted June 12, 2012 No, I used the same xlr cable to my Streamliner 900 and it was fine. It was a touring Ampeg rig, so probably just an electrical fault it's picked up. Reassuring to know; thanks alll. Those Ampegs do sound gorgeous though! If I just had a van... And a roadie... And a spare couple of grand... Quote Link to comment Share on other sites More sharing options...
JTUK Posted June 12, 2012 Share Posted June 12, 2012 [quote name='moonbass' timestamp='1339446160' post='1688721'] Played through an Ampeg SVT 4 in the studio yesterday, and ended up changing back to my own rig because the DI out, although a great tone, had a horrible hum on it. I've had this before on several amps and it was solved with a ground lift switch, but the SVT doesn't have one. Just wondered if this is a problem with all Ampegs or if it's just this one? [/quote] A decent DI box would have gotten round the earth lift issue. I'd be wondering what sort of strudio doesn't have them...or P.A co, for that matter. But why Ampeg doesn't have them,...hmmm, don't know. I have 2 DI's outs on my amp and both have earth lifts..!! Quote Link to comment Share on other sites More sharing options...
moonbass Posted June 12, 2012 Author Share Posted June 12, 2012 Well, by the time I'd switched to my rig it wasn't worth trying it with a DI as the Genz has a decent DI (although also has a bit of a hum!) Just wondered about Ampeg for possible future purchasing purposes. The fan noise issue is also a bit of a pain though! Quote Link to comment Share on other sites More sharing options...
flyfisher Posted June 12, 2012 Share Posted June 12, 2012 Not sure I understand the ground lift thing. Well, I do, but why would it be necessary with a balanced output? Or are we talking about unbalanced DI outputs? I don't have a wide experience of instrument amps but my Ashdown head and Ampeg combo DI outputs are both balanced. Quote Link to comment Share on other sites More sharing options...
umph Posted June 12, 2012 Share Posted June 12, 2012 [quote name='flyfisher' timestamp='1339506024' post='1689420'] Not sure I understand the ground lift thing. Well, I do, but why would it be necessary with a balanced output? Or are we talking about unbalanced DI outputs? I don't have a wide experience of instrument amps but my Ashdown head and Ampeg combo DI outputs are both balanced. [/quote] balanced signals are still grounded, sometimes ground current choose not ideal paths and create ground loops resulting in noise Quote Link to comment Share on other sites More sharing options...
ashevans09 Posted June 12, 2012 Share Posted June 12, 2012 I had an American SVT-3 and it was noisy as hell. Only experience I've had really. Maybe it's just a duff one? Quote Link to comment Share on other sites More sharing options...
0175westwood29 Posted June 12, 2012 Share Posted June 12, 2012 isnt this the whole reason theres a ground lift switch? never had any probs with my pro-6 when i had it. andy Quote Link to comment Share on other sites More sharing options...
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