The ESB HR 10 US-A is an active underseat subwoofer designed to add deep bass to vehicles equipped with Android audio systems. This compact unit features a 10-inch driver housed in a sturdy aluminum case, allowing it to fit discreetly beneath a seat without sacrificing structural integrity. It utilizes a Class AB amplifier that delivers 200 W RMS to the subwoofer and 4 x 35 W RMS for additional channels, ensuring a balanced sound profile across a frequency range from 20 Hz to 22 KHz. Installation is simplified through an Android Plug&Play connection cable and an auto power-on feature that activates when Hi-Lev inputs are detected. You can fine-tune the audio experience using the included remote control or the onboard controls, which include a variable gain adjustment, low-pass filter, phase control, and bass boost. The system also offers a three-band equalizer for Bass-Mid-Bass, Mid, and High frequencies with a range of -9 to 9 dB, making it a practical choice for drivers who want to enhance their factory sound system with minimal effort and space.