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Fit it Yourself?

Everything you need to fit it yourself at home

Only £30.00 

With Steering Wheel Control
Only £50.00 

 JBL PX300.4

JBL PX300.4 4-channel 770 watts amplifer

£114.99 Save £671.86 (85%)  was:£786.85
5 Stars 5
Quickfind Code - 23073
Save £671.86 (85%)
rrp: £786.85
This product has been discontinued

  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Next Day Delivery available on all order before 5pm Next Day Delivery available on all order before 5pm
  • Easy Returns Easy Returns
  • 1 Year Easy Warranty 1 Year Easy Warranty

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Sorry, this product has been discountinued. We recommend the following product.

Alpine PMX-F640 4 channel amplifier 640 watts
Alpine PMX-F640

Key Features

4channel 770 watts amplifer - JBL PX300.4

JBL PX300.4 770 watts 4 Channel Power Amplifer with Electronic Crossover And Dynamic Bass Optimization (DBO).

The JBL PX300.4 is an ideal choice if you are looking to deliver great power to your front and rear speakers. This amplifier was developed with sonic accuracy in mind delivering ultra-low distortion and exceptional channel separation.

The JBL PX300.4 comes equipped with a slope selectable electronic crossover capable of setting the slope rate at 12dB or 24dB per octave. The additional adjustment will allow you to maximize output power and finely tune the system response to your vehicle.

Dynamic Bass Optimization (DBO) - The rear two channels of the PX300.4 includes DBO which provides variable filtering with adjustable "Q" below 100Hz, far beyond conventional "Bass Q" circuits, by allowing the low-frequency output to be optimized for specific subwoofer applications. Frequencies below an enclosure's tuning frequency can be attenuated, preventing damage to the subwoofer and allowing the amplifier's power to be better utilized.

Full-range preamp outputs - In the event that multiple amplifiers are used in an application, this feature allows for streamlined system hookup. No high-loss Y-adapters or splitteres needed.

JBL PX300.4 Features:

  • 770 watts 4 channel amplifer
  • 358 watts RMS
  • Die-Cast Aluminum Chassis with Top Plexiglas Viewing Window
  • Full MOSFET power supply
  • Dynamic Bass Optimization Subsonic Filter
  • Preamp Outputs
  • Dimensions: 17"D x 12-1/4"W x 2-9/16H

Download image of JBL PX300.4 Click here for Image of JBL PX300.4
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Fitting Services

Need help with Installation?

Here at CarAudioCentre we offer a professional and reputable fitting service in all our stores. For all fitting enquiries and bookings please visit or call one of our nationwide stores. Our fitters can install your new car stereo, DAB radio, audio visual, speakers, subwoofers or amplifier. We can also help to connect your iPod or MP3 player to you existing audio unit and can offer the best advice on the right in-car entertainment for your vehicle, to further this more we also offer a total 100% custom installation service for demo and show vehicles. So if you have an idea come on in and run it past us, the possibilities are endless and we are never too busy for an enthusiastic chat about our favourite subject.

Please note:

"That our two year warranty on products is only applicable to purchases made directly from us and that have been fitted in one of our stores."

Our Stores:

542 546 Mansfield Road, Sherwood NG5 2FR
Tel: 0115 9624 986
743-745 Eastern Ave, Newbury Park, London, IG2 7RT
Tel: 0208 599 2368
835 Garratt Lane, Tooting, London, SW17 0PG
Tel: 0208 971 9181