CurtPalme.com Home Theater Forum

[Elaine Benes]

I can buy a Velodyne F-1200 powered sub that has a "hum" then shuts off, price is $25.. Is it worth the cost to repair ? Grateful for all opinions...

[Curt Palme]

Piece of cake I'll bet. Bad filter caps. Just had a Polk come through here locally that had one of the two filter caps wide open. $3.00 fixed it, flipped it for $50.

[Curt Palme]

Piece of cake I'll bet. Bad filter caps. Just had a Polk come through here locally that had one of the two filter caps wide open. $3.00 fixed it, flipped it for $50.

[Curt Palme]

BTW, I might take the above back. NOt sure how old that 1200 is, but we were the warranty repair depot from 1992 to 1994 here. THere's a servo sensor glued to the inside of the dust cap, and it it fails, some amps will oscillate and take out the woofer. Not sure if they repaired that 'minor' design flaw when the 1200 came out. Safe to say that if it's 120Hz buzz, then yes, I'd suspect the caps. I'd grab it for $25.

OT, but still with Verodynes: Bob Rock, the producer that struck it big with Metallica and others bought two 18" Velodynes from the local stereo store in 1993 or so. He complained that they sounded radically different. THe store brought in one at a time, and they sounded fine. But.. they brought in both, and they were indeed wildly different. Seems like the damping factor of each amp module was totally different. Couldn't find an actual problem, so we had Velodyne send two more amp modules up, and we found two that sounded roughly the same out of the 4. Bob was happy.

[Curt Palme]

BTW, I might take the above back. NOt sure how old that 1200 is, but we were the warranty repair depot from 1992 to 1994 here. THere's a servo sensor glued to the inside of the dust cap, and it it fails, some amps will oscillate and take out the woofer. Not sure if they repaired that 'minor' design flaw when the 1200 came out. Safe to say that if it's 120Hz buzz, then yes, I'd suspect the caps. I'd grab it for $25.

OT, but still with Verodynes: Bob Rock, the producer that struck it big with Metallica and others bought two 18" Velodynes from the local stereo store in 1993 or so. He complained that they sounded radically different. THe store brought in one at a time, and they sounded fine. But.. they brought in both, and they were indeed wildly different. Seems like the damping factor of each amp module was totally different. Couldn't find an actual problem, so we had Velodyne send two more amp modules up, and we found two that sounded roughly the same out of the 4. Bob was happy.

[Elaine Benes]

Thanks so much for the input !

[Artinaz]

At worst couldn't you use it as a passive subwoofer and mate it with another amp if you have it lying around ? You would have to run the internal connections a little bit differently, but that should be a piece of cake.

[Elaine Benes]