I recently had a kitchen remodel using a lot of led lighting. I have a mini system in the kitchen that popped and periodically hummed when the lights were on. I plugged the amp into a cheapie surge protector and all was resolved. Maybe a line conditioner would help the humming mono block.
Help With Buzzing Sound
I run a pair of Hegel H30 SS amps in the mono block configuration. Just recently, there is a noticeable buzzing sound emanating from my left speaker when the amps are just idling. I know it's the amp as I've moved things around and the problem follows the amp. It is there both in mono mode, and in the left speaker only when I've switched it to stereo mode. Looking for suggestions as to what the most likely culprit may be. Also trying to avoid shipping a 100 pound amp across the country to the authorized service center. All help is greatly appreciated. Cheers.
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A look inside of the Hegel H30 SS Any internet routers or such on the left channel side of the Amp?
Do you have any RCA shorting plugs? For a test totally isolate the amp from everything. Install RCA shorting plugs on the RCA input jacks on the amp. Unplug all other audio equipment from 120Vac power outlets. Everything. Power on the amp and check for the buzzing. Buzzing still there? Does it sound like this? Like this? If it sounds like 120Hz, good chance a left channel power supply rectification/filtering problem. How are you feeding 120Vac power to the amp? A separate dedicated 120V branch circuit? (Dedicated circuit with its own, Hot, neutral, and ground, conductors?) If yes plug the amp into a different branch circuit feed. Check for buzzing. Still a buzzing sound? . |
@thecarpathian I have checked with AI, but find it very unreliable. So often the AI answer is blatantly wrong. Thanks to all who have responded. It would appear the most likely issue is a failing capacitor. Everything else has been eliminated. The sound is there when no signal source is connected, it is not affected be volume when source is connected, and disappears completely when another amp is switched in. I guess I start calling around to see if any local repair facilities will look at it. Cheers. |
@jea48 Thanks for that. Definitely the 60 Hz buzz. |
Hi , sorry to hear you have an issue. Off topic but possibly helpful. I recently had an issue with one of my tube mono blocs. At 55 lbs I feel your pain for shipping cost. When I sent my amp for repair I decided to send both. The culprit was a resistor on the phase tube circuit, but they diagnosed tired diodes in the power supply sections of BOTH amps. The other amp sounded fine and I guess until I had a failure I would not have known. I used Pirate Ship at the recommendation of the manufacturer and that eased the sting a bit. Also I’d like to compliment you on your listing room and appreciate the details you posted as I’m looking at acoustic treatments and building my own rack. Thank you for taking the effort to share your hard work. Respectfully, Mike B. |
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