I had an Audio Research MP-1 with the same malady. After a while, I could not tolerate it.I have an Audio Research SP-8 preamplifier to repair with so much transformer noise I can hear it from 5 ft away...
If that's a Nelson Pass design, he's always been careful about noise. My First Watt J2 is hooked right to my horns, but no audible noise.I 5 have 30yo+ Adcom amps running in my multich rig and none of the units physically buzz or hum.
Plus, I can stick my ear in the horn of my JBL speakers and hear no hisssssss ?
SO, Where's the progress? LOL
It s normal. Tested 5x M33 so far and all have the same noise. Same goes for the C298 being very similar construction.Good evening,
I recently started my audio journey and it’s been a joy! I’m struggling with a (maybe silly) beginner-question that I hope you can help me with. It’s my first post, looking forward to your replies.
I have a NAD M33 and I’m happy with it. Recently I noticed that it makes a soft buzzing sound, which is only audible when I put my ear close to, right above it (can’t hear it at the listing position).
To prevent getting fixated on it, I’d like to understand if it’s normal for the device to make a soft buzzing sound or if it should basically be completely silent?
Your wisdom is more than welcome.
Thanks and nice evening!
Note that a C298 does not sound at all like an M33It s normal. Tested 5x M33 so far and all have the same noise. Same goes for the C298 being very similar construction.
Nothing 5o worry about.
That’s good to hear, total peace of mind now ;-)It s normal. Tested 5x M33 so far and all have the same noise. Same goes for the C298 being very similar construction.
Nothing 5o worry about.
Then one of them must be broken..Note that a C298 does not sound at all like an M33
hum ... all DACs based on ESS xxxx or AKM xxxx sound the same ?Then one of them must be broken..
Nah man, my equipment is not revealing enoughhum ... all DACs based on ESS xxxx or AKM xxxx sound the same ?
Borrow both and test at home
We see this sort of implausible claim frequently. But somehow, always lacking actual evidence (like ears-only testing with basic controls). Will you be the one to finally provide actual data demonstrating this to be true?hum ... all DACs based on ESS xxxx or AKM xxxx sound the same ?
Borrow both and test at home
Hello,Nah man, my equipment is not revealing enough
Hello,We see this sort of implausible claim frequently. But somehow, always lacking actual evidence (like ears-only testing with basic controls). Will you be the one to finally provide actual data demonstrating this to be true?
After a while, I could not tolerate it.
Next to DC blockers, would a different transformer be less noisy (“mechanical vibration”) in your opinion? What specs to look for for low transformer hum?I sold a pair of highly regarded Class A amplifiers because of excess transformer noise. Why pursue electrical S/N when the amplifier sets an elevated acoustic noise floor itself?
My M33 also has the coil noise and it is coming from the unit. Mine was shipped to NAD, they told me it was within spec.Un shield power cords, interconnect and/or speaker. Wires cross all over the place. Too much non audio device connect along your sound system power strip. Unnecessary stuff like lights, charger, tv, fan..... Etc beside your system. Live in urban apartment. Some of the stuffs I can think of.
But in most (all?) cases of the M33 it is not. I checked for my own unit and another out of the box. If nothing is connected to the unit, a few moments after turning on, the noise starts from the unit itself. Of course on a grounded power supply line.It could be from the input source such as CD player, portable audio player, or other sources. My amplifier at home produce humming when I connect it to my portable audio player but when I connect USB-DAC from iPad no humming, even at max volume knob as clear as the amplifier off.