use a stopwatch, time it, always the same time delay?
The volume of my speakers going down by itself and going back again in a minute or two
I just upgraded a used Audio Research tube Preamp and a power amp. I found that the The volume of my speakers going down by itself and going back again in a minute or two. What could be wrong? Both amp and preamp are used. I had my speakers for 20 years. Never had the issue before. Help!
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My first inclination is there is an issue with the new to you preamp. If you have a spare pre try it and see if the problem goes away. If it does that at least narrows down the component. If indeed the preamp, and not knowing which specific audio research preamp you own, there could be a motorized volume control that is linked to a microprocessor. My suspicion would be the microprocessor control reaching temperature and doing some odd things making the motorized volume control turn fully down then back to normal. If it is a motorized volume control see if the volume knob is actually turning when the volume goes up and down. Some AR don't have a motorized volume control and are microprocessor controlled. I think the problem lies within the physical means for changing the volume within the unit like the motor, what controls the motor, or a microprocessor is out of spec. Only a guess though and if true that would probably require a journey to a tech to iron out. Best of luck. |
Wow! Thanks for all the suggestions! I ought my Audio Research a few months ago from eBay and never had any issue with it. Just got the BAT 6200 from Audiogon yesterday and hooked everything last night. I did find one problem, though. One of the speaker fuse is broken. I am not sure if this cause all the trouble. I have a pair of Carver ALIII for over 20 years. It has two fuses each speaker. One for the base, one of ribbon. I did use one of my other pre-amp with BAT amp, I still found the sound went up an down some how. However, after I only hook up the speaker without the broken fuse, the weavy sound is gone. Very strange. Anyway, I will go to Homedepot to ge the fuse and and see this if this problem goes away after replace the new fuse. Ting |
The model of the Audio Research I bought is LS17SE Tube Hybrid Stereo Preamplifier. |
- 16 posts total