Hi, and welcome to DC!
My 440 Pros make a slight noise when they are turned on and off. First one speaker, then a split second later, the other one. I can hear this clearly from the listening position, but it’s not loud, and I’ve never worried about it.
I’ve never heard anyone complain of noise coming from a speaker when there is nothing playing though. In fact it’s the only amp I’ve ever owned that is completely silent in this respect.
Does it matter which input you are using when you hear this “back noise”?
If I understand correctly, both the 250 and the 120have the "back noise"?
This , I think, is highly unusual and I wonder whether it might have something to do with your power supply. Do you have a bad mains supply?
Does it make any difference to your overall sound quality, is the hiss audible when playing music? If the noise increases when you turn the volume up, then I would worry.
Are you living out in the sticks far away from the nearest mains transformer?
I hope you get it sorted out.
P.S. your English is very good. Better than some English people!
My 440 Pros make a slight noise when they are turned on and off. First one speaker, then a split second later, the other one. I can hear this clearly from the listening position, but it’s not loud, and I’ve never worried about it.
I’ve never heard anyone complain of noise coming from a speaker when there is nothing playing though. In fact it’s the only amp I’ve ever owned that is completely silent in this respect.
Does it matter which input you are using when you hear this “back noise”?
If I understand correctly, both the 250 and the 120have the "back noise"?
This , I think, is highly unusual and I wonder whether it might have something to do with your power supply. Do you have a bad mains supply?
Does it make any difference to your overall sound quality, is the hiss audible when playing music? If the noise increases when you turn the volume up, then I would worry.
Are you living out in the sticks far away from the nearest mains transformer?
I hope you get it sorted out.
P.S. your English is very good. Better than some English people!
Project Eperience X Pack with Ortofon Rondo Red MC, Oppo BDP 105D, 2 x Sonos Connect, QNAP HS251+ NAS with 2 X 6TB Western Digital Red, Mac 5K 32GB running Lifetime Roon, iPad Pro 12.9" for remote control. Etalon Ethernet Isolator, Devialet 440 Pro CI, Sonus faber Olympica ll with Isoacoustics Gaia ll feet, Auralic Taurus Mkll headphone amp., Denon AH-D5000, Sennheiser HD600 and HD800 with Cardas cable, Van Den Hul The First Ultimate and Crystal interconnects, Furutech power cables, GSP Audio Spatia speaker cable.
South Coast England
