Review on 🚗 Car Amplifier Subwoofer EQ Crossover with RCA Line Level & Volume Control by Jeffrey Kue

After building my own professional PA sound system I found some discrepancies between several subwoofers. A pair of subwoofers was clearly too loud and had an annoying frequency "hump" in the mid-bass. This inexpensive, easy to install and use device solved both problems. Just plug it in via the RCA jacks (no power required) and set the volume and cutoff controls to your liking. The audio geeks among us might want to use frequency test tones and a dB meter to get a perfect match. It's perfectly legal. I just used my over-trained ear to get the sound I wanted (although I have access to test tones and my own dB meter). Highly recommended!