NAKVMN 7 Band Sound Equalizer 2 Channel Audio Mixer Equalizer Digital Sound Equalizer

I was looking for a 10-band audio equalizer to connect to my old school speaker system which has built in AMP and no equalizer at all but, they are expensive, finally I found this one with the cheap price which produces a very crispy and heavy sounds Lows, mids and the highs are great. Go for it.

i just got this so i can adjust my computer, CD player, turntable as my amp/receiver is kind of out of reach and doesnt have treble/bass controls. also with my records there is a lot of variance in tone and quality so i like being able to adjust the EQ substantially. this thing works really well right off the bat, and i am getting no noticeable distortion or volume issues. since it's a graphic EQ it has its own amplifier inside to adjust for volume differences when adjusting frequencies, and i feel it does this pretty well. it's fun to change the knobs and you dont lose or gain a bunch of volume. it sounds good! the volume control also can become a master volume and is very handy if your receiver is out of reach or requires a remote. i would say to anyone getting a lot of noise - try it with a 12V plug. this one comes with a USB cord but no actual power supply, and i didnt try 5V yet but i know in most analog amplification more voltage will be a lot cleaner, so be sure to use 12 volts positive ground. also if you are sharing the same DC adapter/power supply as your computer or other devices you may experience a lot of noise. so be sure to either use a single AC outlet that isnt sharing any other USB devices or get one of those cheap USB ground loop adapters. they work! update: i have used the headphone amp/jack and at least on regular old headphones and as a main out to my bluetooth receiver in the other room, no issues or noticeable downgrade in audio quality from my source (PC, turntable , cd player). i like being able to control everything from my desk and running into the EQ into my living room setup. I thought i heard some clipping one day but by adjusting the volume on my computer that seemed to do the trick. the EQ does have an amplifier in it and much like your old tape deck or mixer, you can push too much signal into it. (at least that's how it behaves, not sure the actual engineering involved). the real question of course is whether you "NEED" an EQ. audiophiles tend to not like the idea of anything other than a flat response, which would be fine if your speakers are perfectly placed, your room dimensions ideal and most importantly if your audio source material was all up to snuff. and of course there's personal preference! i enjoy having more control and using an EQ for my purposes, but it's also not going to make a bad system sound good or make bad sources sound great. its just about having more control and the ability to tweak to taste. for $20 i'm very pleased and hope to have no issues with this little thing going forward at first i thought some of the frequencies were odd choices (15 khz instead of 10khz) but i'm finding they may be pretty useful after all! i'm still just starting with this so will update review if any issues come up.

Came across this and thought ok, a twenty dollar toy. used it in the house and in the car. With various sources driving mainly JBL portable speakers. Sound lacked clarity and there was persistent noisiness that I haven't been able to eliminate. Put away for now but I'll probably play around with it again to see if I can get any better result. So: a twenty toy!

There are a lot of places I could put an EQ, more than just as a headphone amp, so this has a lot of potential applications. Right now it's set up after an effects processor that's running after an aux send from a mixer that has various synths going into it. I'm running RCA cables from the effects processor into the mixers tape input, because all the other inputs are taken up, and this EQ box gives me a handy volume control I wouldn't otherwise have. More than that, of course, is tone shaping from the 7 frequency bands. It's a decent array of frequencies, but of course with anything that isn't parametric, I'm left wishing they were at different frequency points. I also wish they'd cut more than they do. But as it is, it's still more control than I previously had, and that's still useful.

It really works well, but I don’t turn the frequencies all the way up since it is possible they may create some unwanted distortion, which is expected with almost any analog frequency augmentation. For its size, price and multiple frequencies, can’t be beat. I use in my home gym sound system.

No matter what I do, try different power sources even using a power bank. I still get a buzz.