Kenwood 4042A - KGC Equalizer / Crossover provides adjustable level control for five frequency bands centered around 50 Hz, 200 Hz, 800 Hz, 3.2 kHz, and 12.8 kHz. This allows for precise customization of the sound output to suit your preferences. Additionally, it features a Subwoofer System that offers adjustable output level and cut-off frequency for your subwoofers, giving you control over the bass response. The Fader function enables you to balance the sound output between the front and rear speakers, ensuring an immersive and tailored listening experience.