After plenty of research, testing and using a number of underseat subwoofers (the above photo is my Kenwood KSC model), we’ve gained plenty of experience with these speakers. As well as our experience and testing, we also based the recommendations below upon multiple factors. The factors that we considered included their performance (peak power and RMS), size, construction, remote control, supplied hardware, warranty and value for money. Best Underseat Subwoofer Overview This little beast was designed as direct competition to the Kenwood KSC-SW11 and the Pioneer TS-W130EA. Everything about this sub is superior, the structure, cone material, the amplification and the robustness.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. Scottish Islands - HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3 Here are some of the top reasons why the In Phase USW300 is the best underseat subwoofer in the UK:

One of the main advantages of the In Phase USW300 is its impressive sound quality. This subwoofer features a 6.5-inch driver with a powerful 150W RMS amplifier that can produce deep, punchy bass tones that will take your car audio experience to the next level. The USW300 also has a frequency response range of 20Hz-150Hz, allowing it to reproduce all the low-frequency sounds in your music with stunning accuracy and clarity. Despite its exceptional performance and build quality, the In Phase USW300 is surprisingly affordable, making it an excellent value for money option for anyone looking to upgrade their car audio system. With its low price point, you can get a high-quality subwoofer that will significantly enhance the sound of your music without breaking the bank. SPECIFICATION: Speaker Frequency range 40-150hz Bass Boost 26db Gain @ 42Hz Bass Boost Frequency Wired Remote Control High-Level speaker input The In Phase USW300 is built to last, with a robust construction that can withstand the rigors of daily use on the road. The subwoofer features a tough, scratch-resistant aluminum housing and a high-quality driver that can handle even the most demanding music genres without distortion or damage. When it comes to in-car speakers, brands such as Kenwood and Pioneer spring immediately to mind. But are they worth the expensive outlay? Not, it seems, compared to In Phase’s International’s under-seat woofer, the USW300.data-src="https://cdn.media.amplience.net/i/washford/Halfords Car Audio fitting & installation service"