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Precision Power PPI P900.4

900W Phantom Series Class D Full Range 4-Channel Amplifier

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List price $359.95

$179.95

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Bundled Savings with this Product

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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

38338

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Precision Power PPI P900.4

$179.95

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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

$217.44

You Save $12.50

General Features:

  • Phantom Series Class D Full Range 4-Channel Car Amplifier
  • RMS Power Rating (14.4V):
    • 4 ohms: 145 watts x 4 chan.
    • 2 ohms: 225 watts x 4 chan.
    • Bridged, 4 ohms: 450 watts x 2 chan.
  • RMS Power Rating (12V):
    • 4 ohms: 100 watts x 4 chan.
    • 2 ohms: 150 watts x 4 chan.
    • Bridged, 4 ohms: 300 watts x 2 chan.
  • MOSFET power supply
  • LED power (green) and protect (red) indicators
  • On/Off circuit delay
  • 4/3/2 channel operation
  • 3-Way System Protection circuitry
  • Tri-mode capable
  • Band-pass crossovers
  • Input source selector
  • SMT Circuitry
  • Composite double sided epoxy PCB
  • Heavy duty aluminum alloy heatsink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Input sensitivity:
    • Low level: 200mV-6V
  • Variable high-pass filter (20-4000 Hz, 12 dB/octave)
  • Variable low-pass filter (50-5000 Hz, 12 dB/octave)
  • Damping factor: >114
  • Dimensions: 10-15/16"L x 6-3/4"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.
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

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.

145 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.

225 watts x 4 channels
RMS Power @ 1 ohm

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 1 ohm, 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.

Not Stable
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.

450 watts x 2 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
Phantom (Precision Power)
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.

900 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
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)
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).
Yes
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.

No

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
86%
4 Star
5%
3 Star
0%
2 Star
5%
1 Star
5%

Average Attribution Rating

Durability
4.4
Value
4.6
Features
4.5
Design
4.3
Usability
4.4

Toe Jam

Sticks,MD

Overall
Durability
Value
Features
Design
Usability

PPI of old

May 3, 2014

This amp is brings back memories of the 90's PPI stuff just a whole lot smaller. I have it powering an Alpine SPR-60C component set up front and 2 Rockford T1692 6x9's in the rear and holy crap this thing is amazing !! It packs a serious punch for it's size and is so worth the money. I just wish I picked up another one before they sold out !

1 of 1 found this helpful

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john

Marco Island, FL

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Value
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Usability

best amp for $$ period

April 21, 2014

Runs cool and has gobs of power. I have it running a pair of 8" fosgates and a pair of 6X9 Infinities in my Nautique. It flat out pounds. I would recommend this amp / speaker combo every time.

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Jones

WI

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Value
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Design
Usability

PPI P900.4 Big power little package

March 25, 2014

This amp is small and does a great job, it has plenty of power for most car systems and stays cool. I cant say anything bad about it. Have a good set of speakers because this amp has got big power!! I am running 2 set of Polk mm6501 off this amp and it sounds very good!! For the price you cant go wrong, this is a deal..

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Ryan

Port Allen, LA

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Value
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Usability

Great little amp

December 29, 2013

I would recommend this amp to anyone who needs a lot of power, small current draw, and doesn't want to break the bank. I think for 99% of car stereo enthusiast, this amp is all you will ever need. Personally I can not hear a difference between this and other A/B amps that I've had before this. The extra power is nice to have and so is the lack of strain on my electrical system. The amp is small, easy to install, and easy to use. The screwdriver issue isn't a huge problem as long as you have a small one around. That is really the only knock against it.

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nadcicle

Nashville, TN

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Value
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Usability

PPI P900.4 - Tiny amp, huge power

December 6, 2013

Ordered this amplifier after hearing about all the positive reviews of it putting out a clean powerful signal. I read into how it came with reducers to fit 0 awg wire for those of us that only run such. Upon opening the box I was greeted with such a small amp staring back at me that I almost dropped the box from laughing. I was thinking to myself of all the places I could mount this thing cause it was so small. Besides the size of it, this amp is also extremely appealing for those of us that like sleek and shiny black. Well, I started hooking this thing up to come back with only a single gripe and that is the location of all the screw heads. I felt like I was scratching the edge above the power/ground area trying to tighten down the reducer. After I finished wrapping my screwdriver in tape to prevent scratching my new amp I finished my install. Starting this thing up had a strong click from the switch and a bright blue "on" light. I started adjusting this thing and really started get more and more surprised that so much power can come out of such a tiny package. I really was blown away by how they managed to squeeze all of the knobs on the side for setting up for an active system. It really is all crammed on a single side. If I had to see another revision I would suggest top mounted controls more spaced apart, but alas after settings them up correctly it was strong clean power coming straight through my speakers. I was so surprised that I went ahead and ordered another almost immediately. I will be back to order 1 more and go ahead and get a 2 channel while i'm at it soon. I might even just order another 4 channel and bridge them instead to keep them all matching.

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Jeremy

newtown, CT

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Value
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Design
Usability

Solid amp

October 7, 2013

I'm pretty happy with it so far .works well

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Tim

Corvallis, OR

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Value
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Usability

Great little amp

September 17, 2013

For anyone looking for a solid class D amp, this is it. I've been running Class-D's in my last couple installs, no issues, no "coloring" of the music, it all sounds clean. Compared to my Kenwood XR-4S, it puts out a little more heat, but much less than any A/B I've owned. The amp is solid, feels like a solid brick. My only gripe is the gain setting. No indexed shaft makes repeat ability difficult, it only has a simple X-cut that doesn't 100% line up with the end cap markings. For the price it can't be beat.

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Bumpasauras

Big spring tx

Overall
Durability
Value
Features
Design
Usability

Ppi 900.4

August 17, 2013

Very happy with the amp. I plan on buying another . Very stable at 2 ohm. Amp performs as advertised.

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david

lakewood, CO

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Value
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Usability

Excellent Amp

July 28, 2013

I purchased this to power two wetsounds Pro80 speakers on my wakeboard tower. I run it bridged & it delivers! Loud clear power. I ended up purchasing the p600.2 & p900.5 as well to run the rest of my system & proudly boast one of the loudest systems at the lake. Requires less power than conventional amps & they take up half the space. Very happy, I tell you buy this amp, mine came with free foam peanuts.

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Davinci

Australia

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Value
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Amazing Amp!

July 24, 2013

I had all the common worries that we all have when buying amps, Does it have ignition/alternator whine issues?, will it cut out up high or can it really handle high loads?. i upgraded to this amp from the Infinity Kappa 4 and considering they are both within the same rms range, this amp is so much better, brought this thing worrying it was not going to deliver, but once i installed it, boy did it deliver simply amazing amp! i have it powering infinity Kappa Perfects and the sound quality is unsurpassed, everyone loves my system! Would recommend this amp!

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Brent

Monument, CO

Overall
Durability
Value
Features
Design
Usability

Awesome!

May 8, 2013

Just replaced a 50W RMS 4-channel amp with the PPI to drive a PPI PC3.65C front stage and I'm blown away!!!! Mere words don't do justice to this setup.

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Robert

Sanford, FL

Overall
Durability
Value
Features
Design
Usability

Great value, power and size

May 7, 2013

Great value, power and size. Almost too powerful, had to turn the gain way down.

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Robert

Sanford, FL

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Value
Features
Design
Usability

Clear and powerful in a small package.

November 18, 2012

I recently installed this amplifier and it certainly has more power than I need for my system. Very clear and loud. no distortion or interference. It has versatility in installation being 2ohm stable. The documentation could be much better. Use a small philips screwdriver and you will have no problems installing the speaker and power wires. Don't forget to buy the 8ga inline fuse, for install.

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FatStrawPDX

Portland, OR

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Value
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Usability

Powering 2 sets of components!

August 31, 2012

This is a great budget amplifier. I'm using it to power my Hybrid Audio Unity U61-2 6.5" 2-way in the front doors and my DLS MS6A components in the rear deck. What I love most about this amp is that it came with 0 gauge adapters for the power/ground cables. This is also a class D amp but very nice compared to most Class A/B amps out there. It produces nice sound quality compared to my old amp and no noise issues.

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Dan

Wilmington, DE

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Value
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Usability

Best budget amp hands down

August 6, 2012

It's not flashy, and it wasn't made to be. It won't wow you with a bunch of unnecessary bells and whistles. What it will do is very quietly, cleanly, and efficiently deliver ample power to all 4 of your cabin speakers, to your front stage and a subwoofer, or to a set of 2 way components run active. Completely utilitarian in design, this little powerhouse completely owns it's price point in the market. If you've made it this far in the decision making process to read this, buy it. You won't regret it.

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Ryan

Mobile, AL

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Durability
Value
Features
Design
Usability

Great Little Amps!

June 18, 2012

I installed a PPI P900.4 and a PPI P1000.1 under the driver's seat in 1998 Toyota Tacoma. These little amps are amazing the power they produce in such a small package. There are 3 things that I can say bad about the PPI is: 1.) Why use Phillips head screws for setting the gains and crossover points? 2.) The Phillip screws for the power and speakers wire holders are partial blocked by the bars made into the ends of the amp. I had to use a very small headed flat head screw driver to tighten the screws without stripping them. Even with my above complaints these amps are a definite best buy! Btw, SonicElectronix.com sent them at lightning speed! Within 2 days after my order, they were at my house!!!

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Michael

Western, MA

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Value
Features
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Usability

Great little, versatile amp!

June 12, 2012

This is a great big amplifier in a tiny little package. Sounds great! Pushes my Front component speakers and bridged the rear to push my iDMAX 12! More than enough power for me. Fits very nicely under my passenger seat. Solid little amplifier. I'm very happy with my purchase.

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backtopoolschool

Houston, Tx

Overall
Durability
Value
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Design
Usability

Solid upgrade

May 21, 2012

I installed this in place of the factory amp in my Porche Boxster S, along with Polk Momo's in the door. Very nice improvement.

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geoff

pomona ny

Overall
Durability
Value
Features
Design
Usability

awesome

March 10, 2012

This amp is a power house and its smaller than a paperback book. Pics do no justice on it's size. Very low noise floor and very efficient. Barely gets warm. I've had a lot of amps most mid level and a couple high end this amp was without a doubt one of the best amps I've had due to its price, size, power and performance. I've picked up another one because of it. Its not the prettiest but you don't look at amps for looks. Homerun on this one PPI.

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Radik

Canada

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Durability
Value
Features
Design
Usability

Precision Power P900.4

December 28, 2011

This amp was for a stealth project in my family sedan. No subs, just a strong front stage and subtle rear stage. This amp is amazing, lots of power. It's set 1/4 way full range and it's making my pioneer rev 6x9s shine. It has a great x-over and great small foot print. Fits perfectly under the front seats. Only gripes with this amp, is the RCA connects seem kinda fragile. Also accessing the power and speaker terminals are a pain, you need a small screwdriver to tighten and adjust them. Problem is you lose the torque ability and can't easily tighten. If you can overlook those drawbacks, this is the best 4 Channel amp on the market, at any price point.

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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 $99.99

T-Spec V8-4DAK 4-Channel 4-Gauge Wiring Kit

Get everything you need to hook up your new amplifier!

Your Price $89.95

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $79.99

Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

Your Price $149.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

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

StreetWires FB0

1/0 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

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

SMD DD-1 Distortion Detector

Set the gain of an audio amplifier quickly and accurately

Your Price $149.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

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

Browse 3 questions and 9 answers
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Why did you choose this?
Sonic Electronix Store
word of mouth, looking forward to seeign the beast in action
ali-ahmed s on Aug 28, 2014
Amp rating fit my install needs, and it was even on sale!
Amy F on Jul 30, 2014
I'm thinking of adding another set of coaxial speaker and a 12" sub. Would this amp work well? I assume I would use 2 channels for the coax so 100W RMS at 12v to each, Do I run the other two channels bridged to the Sub? Does that deliver only 200W RMS to my sub?
Longdrive on Aug 17, 2014
Best Answer: I don't know why Best Answer says you can't do that. 4/3/2 Amps are designed to do exactly that. It doesn't matter what you have connected to those channels as long as the load impedance is correct, in this case 4 ohms bridged. you don't lose a channel, bridging is the combination of 2 channels into 1. You'll have 300 watts so use an appropriate rated sub, either single (4 ohm) voice coil single sub or a dual (2 ohm) voice coil single sub with the coils wired in series to produce a 4 ohm load, or 2 separate 150 watt (2 ohm) subs wired in series to produce a 4 ohm load. You have many choices! Just match as closely as you can, the watts (RMS) ratings of speaker and amp and create the proper Impedance loads with your speaker combinations.
Reply · Report · Steven K on Aug 30, 2014
· Add Answer · I Have This Question Too (0)
How do I run a 4 ch amp and a 2 ch amp off of only 2 RCA outs from my head unit? I have a clarion m502 and want to run a PPI P900.4 for my 4 cabin speakers and a PPI P600.2 bridged for my subwoofer.
Longdrive on Aug 10, 2014
Precision Power P900.4
Precision Power P900.4
Clarion M502
Clarion M502
Precision Power P900.5
Precision Power P900.5
Precision Power P600.2
Precision Power P600.2
Best Answer: Hey Darin, first you need to get two 1-male to 2- female connectors(http://www.sonicelectronix.com/item_45066_NVX-XIN2F.html) and attach them to each of the rear RCA cables on the rear of your Clarion head unit. Next you will connect your P900.4 to the front channel like normal, and connect it to the rear like normal, only you will now have 2 extra RCA cables left that you will use to connect your 600.2 with. I hope this is clear enough to answer you question
Reply · Report · Brandon R on Aug 10, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

P900.4

UPC

709483038196

Weight

6.50lbs

Internal SKU

p9004

Internal Product ID

38338

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: Precision Power PPI P900.4

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