The MMATS Audio MEQ-7 7 band graphic equalizer with subwoofer output is a high-quality subwoofer designed by MMATS, a reputable brand in the car audio industry. This subwoofer is specifically designed to enhance the low-end frequencies and provide a deeper, richer sound experience for car audio systems. With its compact size and powerful performance, the MMATS Audio MEQ-7 is an ideal addition to any car audio setup looking to improve bass response and overall sound quality.