This Boosted Rail class amplifier fits in the palm of your hand and delivers over 300 watts RMS. In excellent condition, this amplifier was meant for applications where saving space is a must (small vehicles, motorcycles, ATV's, boats, etc). Ideal for most single 10-12" subwoofers, or even up to two efficient 8"-10"s. If you have questions, please let me know! https://rockfordfosgate.com/products/details/pbr300x1/