Can it be the relay in the protection circuit that is failing? Sorry if Im hassling but i really want it to work.
McCormack DNA 0.5 Deluxe thumps turning on/off
Hi guys.
I have an McCormack DNA 0.5 that thumps when turning on/off. I recently bought it used and love the sound and all but I cant seem to look past the thumps, i´ve had amps that have done this before but this amp play in total different league. I know the deal about turning the power amp on last when starting and then last when done listening.
I have also plugged it in without any speaker or line cables connected and put a multimeter at the binding post and it picks up a DC current, same for both channels. Note, this happens only when turning on/off and overall performance other than this is excellent.
I also noted that if I have, say my cdp playing and the volume up a little bit you can hear the relay clicking and also a for a fraction of a second there is music playing. I have yet to come to a conclusion on what the problem is and have contacted Steve himself about it, but as an unpatient man I want things done in short notice.
So I would be happy if someone could help me or at least figure out what the problem might be.
Thank you
Fredrik
I have an McCormack DNA 0.5 that thumps when turning on/off. I recently bought it used and love the sound and all but I cant seem to look past the thumps, i´ve had amps that have done this before but this amp play in total different league. I know the deal about turning the power amp on last when starting and then last when done listening.
I have also plugged it in without any speaker or line cables connected and put a multimeter at the binding post and it picks up a DC current, same for both channels. Note, this happens only when turning on/off and overall performance other than this is excellent.
I also noted that if I have, say my cdp playing and the volume up a little bit you can hear the relay clicking and also a for a fraction of a second there is music playing. I have yet to come to a conclusion on what the problem is and have contacted Steve himself about it, but as an unpatient man I want things done in short notice.
So I would be happy if someone could help me or at least figure out what the problem might be.
Thank you
Fredrik
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- 15 posts total
Have you tried contacting Steve McCormack? He is usually very helpful, give him a call. |
I have a DNA-0.5 and a DNA-0.5 Deluxe and my friend has a DNA-0.5 Deluxe and they all "thump" when you turn it on. It is my understanding that this is related to the power supply caps charging up, but perhaps Steve McCormack can post and give more insight. When you turn on your amp, does the front LED turn from yellow to green after about 15 seconds? If not, that would indicate a problem with the amp. BTW, I usually keep the amp powered-up as it sounds better after being on for 24 hours. |
- 15 posts total