In Phase USW300 300W Underseat Subwoofer – Active Car Subwoofer with Built-in. Product Description 300W active underseat subwoofer – In Phase USW10Looking for a subwoofer that has all that bass pumping power but doesnt need a lot of space? With a built in amplifier powering an aluminium coned subwoofer and a max output of 300W the In Phase USW10 is a true pocket powerhouse of audio performance. Measuring a mere 69mm in depth and 270mm in diameter, this unique unit will fit easily in just about any location in your vehicle while still packing a powerful bass punch. You may have to look a little harder to spot it but your search for a compact with impact is truly over. Box Contains USW10, Wires and Remote Bass Gain Features. Rich powerful base – With a built in amplifier, max output of 300 W and 130 W RMS, the In Phase USW300 is a true pocket powerhouse of audio performance. Aluminium coned subwoofer – Aluminium Cones are light in weight and can be really stiff, but they are really robust cones that rarely go wrong. This sub has a damping material built into its cone and spider to ensure a rattle-free performance and deep bass. Heavy duty durable construction – Die Cast Aluminium Chassis – no plastic structure here. The metal body is part of a secure and rigid structure, no flexing body when the unit is in full power, this also helps with bass output. Compact and discrete – Allowing to install the USW300 anywhere within vehicles Boot, Undersea, behind seat and foot wells. We are a small family run business who pride ourselves on our service. We are only happy if you are! Every product is delivered FAST with 100% FREE P&P for all UK customers. All of our items are dispatched with a premium courier service to your front door within 48 hours or less.