If you need a pair of woofer of 165mm with big power but also quality this can be a very good product!. The wooofer have incredible design and costruction is incredible. Amazing look, big power and control of the bass . Price is not expensive and usually for get this quality you must pay much more. Is possible find in the catalogue Xcelsus Audio also The crossover and a good tweeter of the same series for build a complete kit. Xcelsus Audio is a very good company and the result is visible in the products. I think that in the next days i will buy also the subwoofer Xcelsus with the cone in alluminium: i discover that this sub have great power and amazing sound and won also the first positions in competitions sql around the world. Incredible products, correct price and Amazing sound!