Re: Velodyne F1800R Subwoofer - Hum, and occasional LOUD popping
- From: "Leonard Caillouet" <nospam@xxxxxxxxx>
- Date: Sun, 10 May 2009 22:25:15 -0400
"Bob F" <bobnospam@xxxxxxxxx> wrote in message news:gu4uuf$4ru$1@xxxxxxxxxxxxxxxxxxxxxx
This sub hums a lot when first turned on, and once in a while starts popping very loudly shortly thereafter, at which point I have to turn it off. It seems "unstable" at turn on, making funny noises before the popping. The rest of the time, the hum fades down to barely noticable, and everything is OK other than the low hum.
I talked to the manufacturer, who said this old design had this problem, and the only solution was to send the amp to them for repair/replacement for $285. They describe this amp as a "beer-can" amp or something like that, IIRC. The power amp part is in an aluminum can of some sort.
If anyone has dealt with this unit and this problem, I would love to receive hints for repair.
My first thought is just to replace the large filter caps and see if this helps.
Look for the obvious, like a separated surround. IIRC this may have been one of the units with the accelerometer in the woofer and a servo circuit. Separated surrounds would cause this kind of symptom on them.
Leonard
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