Before you start installing the product, disconnect the car battery at the negative terminal ( observe the safety notes of the vehicle manufacturers and all safety factors such as coded head units).

During your purchase online, you will be asked to select a fitting time and location so that an engineer can then attend your home or place of work to fit your battery for you. You are responsible for maintaining the quality and safety of the goods during the period of implementation of the right to refuse. Some would say replace the head unit first, others argue you should start with upgrading the door speakers or put in an amp.

The right to refuse will end after 14 days from the date when you or a third party purchases the goods, with the exception of the carrier and the person you indicated, received the goods in possession. However, having an engineer come and professionally fit it will not only provide peace of mind that your car will soon be up and running but also guarantees that the battery will be fitted properly. Once the location has been determined, place the subwoofer into position with the mounting brackets attached. The cone and spider incorporate damping materials, ensuring a rattle-free performance and deep bass.

Finance is provided by PayPal Credit (a trading name of PayPal UK Ltd, Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH). 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.

Beautiful design, great performance The key element of the In Phase USW 300 is its performance, the small active woofer really has punch, the bass response is amazing, you really get SUB bass. Everything about this sub is superior, the structure, cone material, the amplification and the robustness. Only measuring 280mm x H 200mm x D 75mm this little sub can fit under seats, in boots or on a parcel shelf.

Despite its small size, this compact subwoofer delivers powerful and punchy bass that can bring your car audio system to life. Halfords Ltd is authorised and regulated by the Financial Conduct Authority (FRN 724263) and acts as a credit intermediary and not a lender, offering credit products provided exclusively by Klarna Bank AB (publ). Building on the immense success of the USW8, USW10 and USW12, In Phase have launched their latest underseat subwoofer in their 2020 line-up.Please note that we only offer fitting on select car batteries and do not currently offer fitting on motorcycle or leisure batteries. Your credit rating may be affected which will make it more difficult or more expensive for you to obtain credit in the future. With a built in amplifier powering an aluminum coned subwoofer and a max output of 300W the In Phase USW10 is a true pocket powerhouse of audio performance. Made from a heavy-duty, durable construction, a secure and rigid metal body construction when on full power, there will be no flexing of the metal body. Its exceptional responsiveness gives music a distinct sound in your car, a feature lacking in its competitors that don't react as well to frequency changes or diverse music types.