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In Phase Car Audio USW300 - 300W Active Underseat Compact Car Subwoofer

SKU 76371
Original price £89.00 - Original price £89.00
Original price
£89.00 - £89.00
Current price £89.00


Made from Diecast Aluminium fits snuggly under the seat of any car or in two seaters even behind the seats. Can be mounted inside the boot area also. Has complete control allowing for volume and phase adjustment by rotary hardwired.

- Maximum Power Output 300W
- Die Cast Aluminium
- Crossover Frequency 40-150Hz
- Size 280mm (D) 75mm (H)
- Bass Boost Frequency
- Wired Remote Control
- Ultra Slim Design

Subwoofer - In Phase Car Audio Powerdrive 15

For the SPL monster who seeks more than just musical subtly and punchy slam, the Powerdrive 15 will help all 30hz and below dream become a reality. This monster sub will deliver devilish lows with accuracy and depth.

This latest addition to the almighty In Phase Power Drive series, its dual 2 Ohm voice coils and 3” high temp, four layer aluminium construction means this subwoofer will not be shy and can comfortably deal with an outstanding 1000 watts RMS, backed with the 3000 watts peak power for those high intensity shifts in the music.

High grade material construction and 225oz triple stacked magnet means that power consumption and earth-shaking bass reproduction more akin to a PA system will happily drive all sorts of musical freedom along while threatening windscreens and providing plenty of in your face subsonic delight.

To truly plough the depths of low frequency excellence we’d highly recommend taking a listen to the In Phase Powerdrive 15.   Combine with something like the In Phase IPA2001d amp and bask in minus 30hz subsonic ordinance. 

British Design

All In Phase audio products are designed in the UK utilising over 30 years of audio experience to create a sound that is right for you.

Enclosure Type Subwoofer

This sub is designed to be installed in an enclosure sealed or bass reflex enclosure will suffice. Open air installs can reduce power output.

Bass Reproduction

This In Phase sub offers superb bass reproduction using high quality materials. When using the right enclosure and amp, you could be hitting sub 30Hz!


The In Phase Powerdrive Series subwoofers use a non-pressed paper cone, which is rigid and higher enduring. This is reinforced with Kevlar technology producing a hard hitting, SPL busting monster.

Power output

This sub is build for SPL. So it offers an outrageous 1000W RMS power output and 3000W Peak Power output. Combine this with the In Phase IPA2001D, your windscreen might just fly off! 

a few words from a Car Audio Centre staff member-

"The Powerdrive series subwoofers are absolutely deadly when combined with the In Phase IPA2001D. The first time I heard these monsters, they were being bench tested and I had my back to the testing area, I thought a pair of F-35s was taking off behind me! If you are after SPL, these are ideal for you."

Key features of the PD12:

• Black Powder finish high power cast frames
• Kevalr fiber enhanced non-press paper cone
• 3-Layer EROM high excursion foam surround
• 3' High temp 4-Layer aluminum voice coil
• 3Pcs Mirrow-image contruction black poly-cotton spider system
• Triple stacked totally 225oz Hi-Grade magnets
• Bumped 10pc T-Yoke with extended pole piece
• Half inch thick top plate
• Dual 2ohm impedance
• 1000 Watts RMS power handling
• 3000 Watts peak power handling
• Rubber gasket
• Rubber Magnet boot
• Chrome finish push Terminals

Delivery is made by common carrier next working day. Delivery is FREE for orders in-stock and over £100 or £9.99 for orders less than £100 or special delivery items.

Statutory Cancellation Right

You have the statutory right to cancel your order for any reason within 14 days beginning with the day you receive the item (please see clause 2 of our Conditions of Sale for the full instructions on cancellation and further information on your right of cancellation). We only accept cancellations via phone - 0115 975 8613, email - or post - Superfi Returns, DB House, Rani Drive, Nottingham, NG5 1RF, United Kingdom.

Our Voluntary Returns Policy

As well as your statutory cancellation rights described above, you can return most products within 30 days of receipt of the products if the products are complete and are in an unused and undamaged condition. We only accept returns via phone - 0115 975 8613 or post - Superfi Returns, DB House, Rani Drive, Nottingham, NG5 1RF, United Kingdom.

Please note that this returns policy doesn't affect your statutory rights and therefore doesn't affect your right of cancellation as described above.

Please note that you must return each item in the same condition in which you received it. This means that new items must be returned new, unused and complete (including all accessories). Refunds for returned items that are not received in this condition, may be reduced.

Need Help?

Call us on 0115 975 8613

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