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audio,dave's picture
Last seen: Never ago
Joined: Apr 25 2009 - 9:30pm
Can anyone help me with this Amp problem [noise(humming)]?

Power Amp: Audio Research D125 Tube Amp
Pre Amp: Audio Research LS-15 Tube Amp
Speaker Cable: Purist
Interconnector: Transparent Music Plus

My Problem: When I power on my amp, there's no sound, just a increasing humming noise. Additionally, when we change the power amp, to a different amp; everything is fine.
Please let me know what's wrong with my set-up [amp] problem.


Sorry, if I'm not allowed to post this here. I need the help! Thanks again.

mrlowry's picture
Last seen: 7 months 4 weeks ago
Joined: May 30 2006 - 1:37pm
Re: Can anyone help me with this Amp problem [noise(humming)]?

When you try to play music do you hear music AND the hum or just the hum? Are there any video sources hooked up to the system (cable/satellite box or TV which is hooked up to a cable/satellite box/external antenna or DVD which is hooked to a TV which is hooked to a cable/satellite/external antenna or a radio tuner which is hooked to an external antenna) Many times (but not always) hum in an amp is caused by capacitors that are nearing the end of their life. The next step in the diagnostic process for me would be to try the amp in another system and if that system starts to hum then it's CERTAINLY the source of the issue.

greenelec's picture
Last seen: 3 years 7 months ago
Joined: Feb 10 2006 - 12:37am
Re: Can anyone help me with this Amp problem [noise(humming)]?

Do you mean a mechcanical humming from the amplifier, or a humming sound from the speakers? First thing to do is to call Leonard at Audio-Research. They have the best customer service bar-none!

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