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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 

5 Stars (9)

Alpine Car Audio Systems PMX-F640 4 channel amplifier 640 watts

Save: £86.00 (43%)  rrp: £199.99
5 Stars
9 Review(s) / write a review
Quickfind Code - 23894
Quick Summary:

Alpine PMX-F640 give you power performance at an amazing price. Alpine PMX-F640 is designed to fit easily in any system.

Save: £86.00 (43%)
rrp: £199.99
This product has been discontinued

  • COVID-19 We are open online & shipping orders during the COVID-19 pandemic
  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Next Day Delivery available on all orders before 5pm Next Day Delivery available on all orders 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.

In Phase Car Audio IPA1041

Key Features

4 channel amplifier 640 watts - Alpine Car Audio Systems PMX-F640

Alpine PMX-F640 give you power performance at an amazing price. Alpine PMX-F640 is designed to fit easily in any system. Alpine PMX-F640 car amplifier has a built-in high pass and low pass filters let you set the frequency points to match your speakers and ensure optimum efficiency. Alpine PMX-F640 also enhance their performance with Bass EQ, now you can get even more powerful bass.
  • Amplifier Type: Class-A/B
  • Channel Design: 4/3/2 Channel
  • Thermal Control: Thermal Management Control
  • Power Supply: DC-DC PWM Power Supply
  • Power Supply Design: MOSFET Power
  • Board Circuitry: STAR Circuitry
  • Current Protection: Over-Current, Over-Voltage and Thermal Protection
  • Power Indicator: Top Mounted Blue LED Power Indicator
  • RCA Output: Gold Plated RCA Input Connectors
  • Speaker-Level Inputs: Speaker Level Inputs
  • Crossover: Selectable Low-Pass / High-Pass
  • Connector Plating: Gold Plated Input, Output, Power and Speaker Terminals
  • Pre-Amp Stage: Discrete
  • Final Outputs: Non-Fading Pre-Amp Output
  • Gain Control: Continuously Adjustable Gain Control 

Download Alpine Car Audio Systems PMX-F640 manual Click here to download manual

Download image of Alpine Car Audio Systems PMX-F640 Click here for Image of Alpine Car Audio Systems PMX-F640
Technical Specification
Max Power Output Ratings:
  • Total Max Power: 640W
RMS Power Ratings:
  • Per Channel into 4ohms (≤1%THD+N): 4 x 50W
  • Per Channel into 2ohms (≤1%THD+N): 4 x 75W
  • Bridged into 4ohms (≤1%THD+N): 2 x 150W
Sound Tuning
  • Crossover Frequency (Fix, OFF/LPF/HPF Selectable) 1/2 ch: 80 Hz (-18dB/oct)
  • Crossover Frequency (Fix, OFF/LPF/HPF Selectable) 3/4 ch: 80 Hz (-18dB/oct)
  • EQ (Equalizer): Bass EQ Fixed Frequency 50 Hz _ Selectable Gain 0/+6/+12 dB (3/4ch)
  • Power Requirements: 14.4 V DC (11 V to 16 V)
  • Input Sensitivity: 0.2 - 4.0 V (RCA IN)
  • Input Impedance: RCA IN 10k Ω / SP IN 10k Ω
  • Frequency Response: 10 Hz - 50 kHz (+ 0,-1 dB)
  • Speaker Impedance: 4 or 2 Ω
  • Signal to Noise: S/N Ratio (IHF A Weighted, Reference: rated power into 4ohms) 90 dB
  • Weight: 3.0 Kg
  • Footprint: 270 mm x 60 mm x 242 mm
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Customer reviews

great amp
DEL on 04/10/2015 5 star rating

good service delivery was quick, and great amp with good clear sound.

ANDREWSCOTT on 12/08/2015 5 star rating

Great service great amplifier love alpine products would definitely recommend car audio products

ANTHONY on 13/07/2015 5 star rating

Great service from caraudiocentre. Arrived very quickly, well packaged. Good amplifier. Driving an eight inch sub and front component speakers. Have used caraudiocentre. A few times, each time is a faultless service.

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Questions/Answers About This Product
  • Question: 28 August 2018
    Does PMX F640 fit well with ALPINE R S65C ?


    yes this amplifier would work with the alpine speakrs, although they can take more power you could always use the full 4 channels for the speakers and run them bridged to get more output

    Found Useful? Yes 

  • Question: 15 July 2018
    Car: Subaru Impreza - 1994 >

    Will this amps be enough for SPG-10C2 and SPG-13CS component speakers?


    yes this amplifier would be fine for those speakers.

    Found Useful? Yes 

  • Question: 18 April 2018
    Car: Alfa Romeo 147 - 2000-2007

    Pioneer TS-W3003D4 12" Champion series PRO subwoofer 4ohm DVC 2000 watts ...did this amplifier can run this subwoofer???


    no this this amplifier PMXF640 is a 4 channel amplifier which is really designed for speakers and maybe a small very low power subwoofer, for something like the subwoofer you have we would recommend something like the GMD8601 as at 2OHMs it will give you 500Wrms which is very close to the power required for the subwoofer

    Found Useful? Yes 

  • View All
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

Owner's Manual