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Alpine PDX-F4

400W PDX Series 4-Channel Power Density Digital Amplifier

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List price $550.00

$369.95

with warranty

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Order within 2 hrs 19 mins to ship 4/21

Arrives by Friday, Apr. 25 to zip 98144

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In Stock

Arrives by Fri, Apr. 25

Bundled Savings with this Product

=

25% Off a 4 Gauge Amp Kit with Purchase!

Save 25% off the Belva BAK44 install kit, you will need an amp kit to install your amp, and this the perfect kit for your amp!

12.50

26210

292

Alpine PDX-F4

$369.95

+

25% OFF

Belva BAK44

$49.99

Special Price $37.49 ($49.99 if purchased separately)

Belva BAK44

• Complete 4 Gauge 4-Channel Amplifier Installation Kit
• Designed Specifically For Car Audio Systems Up to 1000 Watts RMS
• Premium Power and Ground Wire Provides Optimal Power Transfer

(Offer 1 of 1)

Combined Total Price

$407.44

You Save $12.50

  • PDX Series 4-Channel Class D Car Amplifier
  • RMS Power Rating (@ 14.4V):
    • 4 ohms: 100 watts x 4 chan.
    • 2 ohms: 100 watts x 4 chan.
    • Bridged, 4 ohms: 200 watts x 2 chan.
  • Total RMS output: 400 watts
  • DC-DC PWM Power supply with STAR circuitry
  • Blue LED power/status indicator conveniently located on the top
  • Discrete pre-amp stage
  • 6-Layer glass epoxy PC board
  • Automatic over-current protection system
  • Soft start turn-on prevent initial system popping
  • 4/3/2 channel operation
  • System Protection circuitry keeps the amp running properly
  • Large aluminum alloy heatsink for extreme heat dissipation
  • Gold-plated RCA level inputs
  • Proprietary screw terminals ensure a solid and secure connection
  • Input sensitivity:0.2-4 V with input level
  • Variable high-pass filter (30-400 Hz, 12 dB/octave)
  • Variable low-pass filter (30-400 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 5-100,000 Hz
  • Dimensions: 8-9/16"D x 10-1/8"W x 2"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 1-year Sonic Electronix warranty

Alpine products are warranted solely by Sonic Electronix, Inc. under the same period and terms as the original Alpine warranty. Sonic Electronix is not an Authorized Alpine Dealer and Alpine requires all merchandise purchased by Sonic Electronix customers to be returned solely to Sonic Electronix. Alpine products are also covered by our Standard Return Policy for returns on exchanges or refunds within 30 days from the date of purchase.

Product History:

Alpine PDX-F4 thumbnail
(newest, current model)
Alpine PDX-4.100 thumbnail
(previous model, replaced by Alpine PDX-F4)

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

100 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

100 watts x 4 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

200 watts x 2 channels

Amplifier Specifications

Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

D
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

400 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.003%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
No
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

30 - 400 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

30 - 400 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
95 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
30A x 2 
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

Yes

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
91%
4 Star
0%
3 Star
9%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.9
Value
4.5
Features
4.4
Design
4.9
Usability
4.9

Michael

Mount Juliet, TN

Overall
Durability
Value
Features
Design
Usability

Hold on

December 18, 2011

At first I bought this amp because it was low profile, even though it good specs. I put under front seat so I could put processor next to it. Got everything in and redid front amp for components & rear amp for sub. Did this with VOM because my buddies Oscope was being fixed. I thought would be close enough. Alpine is driving Hertz mlk165 & cdt 2" front fills & DLS 226 coaxials in rear. My HU is Pioneer 4300dvd and I can not get it over 15 out of 40 volume. Amp will run you out of car and never gets hot, no distortion, plenty of power & rocks. Install was easy, using 4ga wire all around. If you are looking for great amp don't hesitate to check this baby out. All my SQ buddies are impressed and they run Sundown, ARC & Audison.

2 of 2 found this helpful

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Trae

Summerdale, AL

Overall
Durability
Value
Features
Design
Usability

SOLID!!!

August 30, 2011

I do not own this amp, but I do own the predecessor and can only say it's still a fine amp! For the footpint, power output, and efficiency, as well as the price, you cannot beat this amp! Alpine quality and sound reproduction is almost second to none except for the extreme high end amplifiers (Zappco, Stetsom, etc.) but you will pay WAYYY more than this little guy! Dont understimate it!

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brian

Canada

Overall
Durability
Value
Features
Design
Usability

very nice amplifier

July 30, 2011

Great sounding amplifier, the class d design sounds every bit as good as my former soundstream and phoenix gold titanium seriers class AB amps. also bought it for its effeciency which is superb, nice small size and the installatioin is the best yet that i have used and i have installed many different amps over the years.

2 of 2 found this helpful

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Bollard

Australia

Overall
Durability
Value
Features
Design
Usability

WOW

July 7, 2011

Powerful son of a gun.

2 of 2 found this helpful

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Daktoa

Canada

Overall
Durability
Value
Features
Design
Usability

Sweet Amp

May 1, 2011

Tons of clean, crisp power! Great product

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matt

York, PA

Overall
Durability
Value
Features
Design
Usability

better amps for the price

March 11, 2014

I really don't like giving products bad or somewhat bad reviews, but in this case I feel the need to. This amp has INCREDIBLE power. I truly love the sound of this amp; however, for the price, there are much better amps available. The biggest issue I have with this amp is the input sensitivity. The max input for this amp is 4v, which is decent for an above average system. If you have a stock head unit and want to run this amp, it requires an LOC like most other amps. For a little bit cheaper, I would recommend the Kicker 11IX500.4 simply because the FAIL safe integration and being able to run a high level input into the amp. Also the kicker has a pre-out for a separate amp incase you want to add a subwoofer. The kicker may only have 75 watts RMS @ 4 OHMs, but this is still PLENTY loud for someone looking for a clear, accurate amp. Of course these features and applications are not meant for everyone, but I just feel that if you pay this amount of money for an amp, there should be a lot more features. I do recommend this amp for anyone who is bias towards the Alpine brand, running this on an aftermarket head unit, and just wants a LOUD system. If that describes you then go with the Alpine. If you're like me and want to integrate with an OEM radio, then by all means look for a different amp like the example I gave of the Kicker IX500.4. Both amps are excellent, but the kicker has a lot more features and capability. I hope this helped someone out.

0 of 0 found this helpful

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Jay

Tallahassee, FL

Overall
Durability
Value
Features
Design
Usability

Great amplifier

March 29, 2013

I admit, I was skeptical when I bought this amp because I wasn't sure if Alpine still made the same quality products they were known for back in the late 80s and early 90s. I was driving Alpine 6.5" Components in the front and 6.5" Coax in the rear of my F150. This amp never had an issue at any volume level. Crystal clear at wide-open volumes. I love this amp and am installing it in my new truck. Trying to figure out which components to go with. have narrowed it down to MMATS Pro Audio, JL Audio, and Sundown Components. All 6.5" component sets.

0 of 0 found this helpful

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SWF King ASAP

Denton, Tx

Overall
Durability
Value
Features
Design
Usability

Awesome as Hell

June 8, 2012

I have this amp powering a set of Alpine Type R SPR-60Cs and and a set of Alpine Type R SPR-69s on a 2006 Harley Electra Glide and I must tell you I am beyond impressed with the clarity and mid bass. I dont have alot of bass because the 6x9s are in saddlebag lids as opposed to inside the saddlebags but the sound is just awesome. There is no need for the bass because I ride my HOG i dont post up rolling at high speeds is louder than the stock or upgraded audio that Harley has to offer and for a whole hell of alot cheaper. The sound is better, clearer and louder than the Harley 8 speaker set up that cost $1900 PLUS the cost of the lower fairings ($650) and the saddle bag lids ($120 primed EACH or $230 - $280 painted to match). This amp is very easy to install. A rookie can do it ease.

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Kent

Fayetteville, TN

Overall
Durability
Value
Features
Design
Usability

Great power for the money

May 25, 2012

I bought this amp a few months ago and absolutely love it. It's powering my mids and highs up front. The highs sound crisp and clear, the mids bang out some drum beats and they will get LOUD when I want them to. The space this amp uses is also a big plus as I have a truck. I've had no issues at all so far with the amp. I do wish you had slightly more adjustability, but I can't complain. Overall, a happy customer!

0 of 0 found this helpful

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Fann

Singapore

Overall
Durability
Value
Features
Design
Usability

Alpine pdx-f4

May 14, 2012

Easy to install. It make my Radical Audio RF tweeter and AVI mid bass so perfect in term of sound. It's even better then my buddy running Bewith Amp using the same speaker. Totally rocks.

0 of 0 found this helpful

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KC

Des Plaines, IL

Overall
Durability
Value
Features
Design
Usability

Great little amp

April 1, 2012

I have this paired with JBL P650C 6.5" components in the front, and JBL P953 6x9's in the back. This amps pushes these speakers well enough to keep up acoustically with 2 JL 13w6v2's in the trunk. I'm planning on updating/upgrading my front stage to something better. I upgraded to this from the pdx 4.100 (old version, also a sweet amp). It does produce slightly better sound quality than the old amp, and seems to use less power while doing so. I don't think it would be worth upgrading from old pdx, unless you want to keep the old one for another car like me. In the past i've used lower wattage fosegate, jbl, (power series) and jl (slash series) amps in it's place, I like this amp far better than those based on footprint alone. SQ using my speaker setup is on par with the jbl and jl amps, fosegate was a little too boomy and muddy, but also cheaper.

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Accessory Tools and Products

Accessories added

NVX XKIT44 4-Gauge 4-Channel Wiring Kit

4-Channel 100% OFC Complete True 4 Gauge Amp Kit with RCA Cables and Speaker Wire

Your Price $79.99

T-Spec V12-4DAK 4-Channel 4-Gauge Wiring Kit

Get everything you need to hook up your new amplifier!

Your Price $129.95

Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

Your Price $7.99

Small Universal Remote Level Bass Control

The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.

Your Price $11.99

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Your Price $6.95

NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

Your Price $17.99

Professional Installation for your Car Power Amplifier

Covers labor charges through our professional installer network.

Your Price $89.99

NVX XIV45 4-Channel RCA Audio Interconnect Cable

5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $21.99

NVX XIX45 X-Series RCA Interconnect Cable

16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $44.99

StreetWires ZN9 Series Interconnect Cable

16.4 ft. of 4-Channel RCA Cable with Rhodium-plated contacts and ZeroNoise construction for clear signal transfer!

Your Price $99.95

NVX XWS1225 12 AWG Speaker Wire

25 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $39.99

NVX XWS1250 Speaker Wire

50 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $29.99

NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $13.99

Belva BBSW127 12 AWG Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $14.99

Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

The Install Bay IB-CAP1F

True 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $37.99

e2 ECAP1 by Scosche - Mid-Level 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $49.99

Rockford Fosgate RFC1D - Top of the Line 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $104.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

AutoSound 2000 CD-104

The ultimate amplifier level setting disc used for evaluation of audio components

Your Price $11.99

AutoSound 2000 CD-102

High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.

Your Price $11.99

XIX2025 Strapping RCA

0.25 Meter (0.86 ft) Hyper-Flex RCA cable w/ Serpentine-Cut Nickel Plated Connectors

Your Price $12.99

Product Summary

Manufacturer

Model Number

PDX-F4

UPC

793276301048

Weight

9.00lbs

Internal SKU

pdxf4

Internal Product ID

26210

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Alpine PDX-F4