Review on Audiotek AT-AP100 Digital Bass Processor & Sound Restoration - 1/2 Din Car Audio Crossover for Subwoofer Tuners with Bass Knob Input (15V RMS, 13.5V Peak Output) by Adam Gechem

1st Off. This product does not make your subwoofer louder, but restores the volume and quality of the subwoofer between 27Hz and 65Hz with the sweep control. "Repair" means that if your subwoofer is not capable of reproducing low frequencies well between 27Hz and 65Hz, this unit will fix it and you will be able to hear those frequencies in your music again in excellent quality. Product Ease of Use: 10/10 So easy to install IF YOU HAVE ALREADY INSTALLED AN AMPLIFIER (because all you have to do is connect the wires from this product with REM, PWR, GROUND and RCA to the amplifier, and do it in MAXIMUM 3 minutes) Quality: 8/10 feels well made metal. Lightweight and sleek. Comes with hardware and a very clear instruction manual. Feature 1: 10/10 Tidying up a dirty subwoofer with a 35Hz subsonic filter (it got rid of harmful frequencies to the ears and the subwoofer itself that can't be heard because they're too low anyway, giving the subwoofer clarity and quality awarded) Feature 2: 10/10 made my subwoofer amazing because it puts out 10 volts, now I'm reaching the full potential of my DVC 8 ohm 10 inch kicker sub. SIDE NOTE. I was able to hear my subwoofer by switching the phase of the subwoofer (by connecting the positive lead to the negative input of the amp and the negative lead to the positive input of the amp). Your sub's hearing problems. However. Overall product 9/10, actually wait, this thing is only $30? 10/10!