Top positive review
Silent, clean, warm amplifier
Reviewed in the United States on May 31, 2020
TLDR: This amplifier is dead silent in an audio chain when you've got everything grounded correctly. Unless you have unusually sensitive ears or are boosting it further, you most likely won't even know it's active and powered if you don't have a record playing.
Keep in mind, due to the nature of record player connections, this amplifier uses RCA to connect your "stuff" together. RCA is "unbalanced", meaning it doesn't have a third, grounding wire, and just +/- instead. As with any unbalanced connections, this opens you up to the potential of ground loops -- but note that this has nothing to do directly with the quality of this amplifier. What you might have happen is a "path to ground" through the amplifier, which is not good for your listening experience. "Short" that ground loop by grounding it to your device after the amplifier, like your mixer. Then, the path of least resistance becomes the grounding wire from your record player to the mixer, stereo, etc. you're using, and you won't get a buzz as the amplifier, well, amplifies the extra electric potential going through itself.
I definitely got a pretty ground loop/buzz due to my setup, but once I grounded my turntable to my mixer (use dedicated grounding points or case screws!), the ground loop stopped flowing through the amplifier and a beautiful silence followed. If you do have any other active devices like mixers, stereos, etc., try grounding things to different places, not just the amplifier itself. I'm rather picky about this stuff, so I want an amplifier that doesn't inject tons of hiss/buzz/hum early in my chain, or any other unwanted noise -- these are challenging things to keep out of high-gain stuff like this. And, to that note, this amplifier does give you a decent/usable amount of gain.
This product does a fantastic job at cleanly amplifying a SL-1200M3D with an M44G on it; once grounded correctly, it well exceeded my expectations. I can move the mixer channel's slider to +10dB with a comfortable listening level at my headphones, and I still do not hear any white noise -- that only comes in at about +15dB, but the volume it produces is really good. For folks that are more into audio, you might recognize that ratio from the noise to the signal as SNR, and this amplifier's SNR is pretty good.