I have a whining sounding coming from my PowerStage 700 (not the speakers) and I wanted to check with other fellow owners to see if this noise is normal or not. The sound isn't loud but can be heard when sitting 10 or more feet away in a quiet room. If this is not normal then I want to have the problem taken care of while the amp is still under warranty. The sound only happens after the amp has been on long enough to get hot.
I've been talking with Seymour Duncan's tech support group and they said I can send the unit in to have it looked at but it would take 6 to 8 weeks to get it back. I don't really want to be without an amp for that long if I don't have to, so before I send it back, I want to check with other PowerStage 700 owners to see if this sound is normal or not.
Please play the video below, turn the volume up, and listen in a quiet space. Ignore the sound that sounds like 60 cycle hum, you are only hearing that because I had to crank the gain on the microphone to amplify the sound for the recording. Listen for a high pitch sound that sounds like a whine or computer noise. This cycle of whine noise with fan turning off and on repeats about every minute or so.
I've been talking with Seymour Duncan's tech support group and they said I can send the unit in to have it looked at but it would take 6 to 8 weeks to get it back. I don't really want to be without an amp for that long if I don't have to, so before I send it back, I want to check with other PowerStage 700 owners to see if this sound is normal or not.
Please play the video below, turn the volume up, and listen in a quiet space. Ignore the sound that sounds like 60 cycle hum, you are only hearing that because I had to crank the gain on the microphone to amplify the sound for the recording. Listen for a high pitch sound that sounds like a whine or computer noise. This cycle of whine noise with fan turning off and on repeats about every minute or so.
- From 00:00 to 00:02 You will hear a high pitch noise that sounds like a whine or computer noise
- At 00:03 The fan starts and high pitch noise disappears
- At 00:20 The fan starts turning off and the whining noise / computer noise starts coming back