XMSJSIY Universal RCA Level Controller Car Audio Amplifier RCA Audio Adjuster Bass Boost Volume Control Knob and Cable for Car Motorcycle Speakers Home Theater

Perfect. Using to tame down output from Nakamichi tape deck. Works great. Good quality.

My car stereo doesn't have sub control so I used this in between the amp and it works perfect! Great adjustability, easy to install, great bass and volume control. Excellent value for the money!

Very simple potentiometer with RCA jacks. Works 100%, but not the greatest build quality. Great if you're on a budget.

Arrived on time. Have not hooked up yet but it looks like good quality stuff : Update! Works great just buy it for the price you can’t beat it

Not sure. I haven't hooked it up just yet. But it seems kind of cheap. Not real sturdy.

Controls volume perfectly. I did buy a different knob.

I bought a couple of these, because the signal levels out of my CD and CR-R drives are quite a bit stronger than the other inputs on my stereo system: up until I cut these into those lines, I would have to turn the volume down quite a bit, when switching to CD from FM, phono, or tape. These solved the problem quickly and cheaply, with no need for an external power source. Note that the input and output pigtails are clearly marked, and (assuming this is wired as a voltage divider) not interchangeable.

Doesn't control the sound, It's either on or off. Only works with one channel. When both channels are hooked up the whole stereo sound goes to the pits. may have crossed signals internally or something.

Uses on my car it works as described no problems with it so far very happy with it

Simple device. Does what it's intended to do. Sub amp volume control! If you don't have sub level control on your head unit and you add a sub, you need this otherwise the everchanging variables in music (production sound, quality, download quality, source, music genre etc etc, will have you pulling over to manually adjust the bass amp every track on your favourite mix. No thanks. No issues. Day 1. For the price I am happy with it.

So far ok, seems to fix issue. My problem was that cd player has 2 volt rca output and my vintage amplifier only 150mV input that 12 times too high and I heard some distortion in speakers. I'm not sure if sound quality went down I'm not huge audio master but no more distortion. ONLY one issue, no one mark cables in/out and is big difference if you connect rca opposite, in my case left channel was lower than right.

this little device does exactly what it says. I have a CD player that runs a little loud, so this works great for adjusting the line output for my vintage stereo equipment

Works perfect and easy to install