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Precision Power PPI i520.4

520W 4-Channel iON Series Class D Full-Range Digital Stereo Bridgeable Amplifier

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List price $219.95

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$109.99

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40% Off on 4-Channel RCA Cables w/ purchase!

Save 40% off the NVX XIV45 4-Channel RCA Audio Interconnect cables with your purchase! You will need RCA cables to install your amp!

9.60

68789

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Precision Power PPI i520.4

$109.99

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NVX XIV45

$23.99

Special Price $14.39 ($23.99 if purchased separately)

NVX XIV45

• 5m (16.40 ft) 4-Channel Twisted RCA
• V-Series • Frost Blue Jacket
• Dual Twisted Pair Hyper-Flex Technology For Better Signal Transfer

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$124.38

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General Features:

  • iON Series 4-Channel Class D Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 100 watts x 4 chan.
    • 2 ohms: 130 watts x 4 chan.
    • Bridged, 4 ohms: 260 watts x 2 chan.
  • Pulse Width Modulated MOSFET power supply
  • Low-Heat producing circuit
  • LED power (green) and protect (red) indicators
  • Balanced signal input
  • Double sided FR-4 PC board
  • Variable Bass Boost (0 to +12 dB bass boost at 45 Hz)
  • SMT (Surface Mount Technology) for easy installation
  • Soft start turn-on
  • 2 or Mono channel operation
  • Speaker-level (high-level) inputs with signal sensing for automatic turn-on
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heat-sink
  • Input sensitivity:
    • Level: 200mV-6V
  • Fixed high-pass filter (80 Hz)
  • Fixed low-pass filter (80 Hz)
  • 4 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
  • Dimensions: 5-5/16"W x 9"L x 1-11/16"H
  • 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.

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.

130 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.

260 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.
iON (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.

520 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.
0.5%
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.
Yes
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.

Fixed 80 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.

Fixed 80 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.
70 dB
Channel Separation
Also referred to as crosstalk. The amount of interference on one stereo channel caused by the leaking of the other stereo channel. The higher the rating in decibels (dB), the better the Channel Separation.
55 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 12 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.
40A x 1 
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.
No
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
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.

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
80%
4 Star
20%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.8
Value
5.0
Features
4.6
Design
4.8
Usability
5.0
War Eagle

Tampa Area, FL

Overall
Durability
Value
Features
Design
Usability
Great little amp for the money.

July 18, 2014

This amp is a great value. I'm running a front soundstage in my car from this little guy, and thus far it's been great. I can't speak to its crossover capabilities since my DSP is handeling that end, but the power is sufficient for my 7" drivers and 2" tweets.

0 of 0 found this helpful

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Jason

Republic, mo

Overall
Durability
Value
Features
Design
Usability
Great!!

July 9, 2014

This is a powerful amp. I am running 4 of the 7" alpine marine speakers with this amp. Wow!! I have room for 4 more speakers on this amp. Very pleased. I highly recommend.

0 of 0 found this helpful

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CJR

Nashville, TN

Overall
Durability
Value
Features
Design
Usability
Great sounding amp with lots pf power.

May 4, 2014

Great sounding small amp with lots of power. I used his amp along with a new set of components and rear speakers and this little amp rocks. With its small size was super easy to do a clean install and easily hide it

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Philip

Riverside, CA

Overall
Durability
Value
Features
Design
Usability
Good Amp

January 26, 2014

The amp works well. I mounted it under my passenger seat. The vehicle was a 2004 corolla. The amp was so small, it very easily fit under the passenger seat. Installation was a breeze and it powers my kicker speakers very well. The one con I found about the product is the ground and power terminals on the amp are stacked on top of each other. Normally those terminals are side by side. I ran 4 gauge power and ground to the amp. The gauge was so large, I could not screw the ground wire screw down far enough to fit in the power wire above the screw. I had to trim down the gauge of the ground wire and power to get them to fit into the terminals. You will need to trim 4 gauge wire or go with 8 gauge wire.

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jeffdachef

garden grove CA

Overall
Durability
Value
Features
Design
Usability
GOOD

December 4, 2013

Owned it for seven months now, it plenty of power and no noise, clean sounding mids and highs lasts long, runs warm-borderline hot on 95 degree summer days but on normal weather 50-80 degrees, it runs real cool. What have i used that i can compare it to? JL audio 60 x 4 A/B channel amp, no difference in sound quality at all, but this ppi amp offers more power with better efficiency. Definitely way better then my friend's hifonics zues/gladiator 100 rms X 4 channels in terms of sound and raw power. Only bad thing i can knock on it is that its not Active capable, pretty much an amp with globs of power and minimal crossover functions.

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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 $59.99

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 $151.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

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

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 $23.99

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 $34.99

Kicker 4-Channel RCA Audio Interconnect Cable

4 Meters (13 ft.) 4-Channel K-Series RCA Audio Interconnect Cable

Your Price $19.95

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 BBSW167 16 AWG Speaker Wire

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

Your Price $12.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

Browse 3 questions and 7 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
I'm a huge PPI fan and have never had a bad experience with them.
Judson C on Dec 18, 2014
Heard good things about it and it was reasonably priced.
Shirlene T on Sep 7, 2014
Small and compact. Nice power, not much adjustability.
Richard R on Dec 13, 2014
I have only a single stereo RCA pair to feed this amp, and plan to power all 4 speakers. If I don't plug in a set to the rear, will I only get signal in the front l/r? Or does it switch and feed signal to the rear l/r when it doesn't detect it? Checked the manual that came with it, no luck.
A shopper on Dec 17, 2014
Best Answer: Hello,

like Todd and Lauren suggested, it will NOT send signal to the rears. We do NOT suggest Splitting the RCA signal, because this will dramatically degrade the overall performance/signal. Your best approach is to use the Amplifiers High Level Inputs w/ the harnesses that come with the amplifier, pictured in the link below. It is a bit more work than simple RCA connections, but is worth the effort if you wish to have a clean output. Instead of RCAs you simply need a strand of "9 Conductor Wire" to run from your stereos speaker wire outputs (total of FOUR outputs) to the amp's high level inputs.

http://www.sonicelectronix.com/pictures_new.php?id=68789&picture_id=1352676

http://www.sonicelectronix.com/item_24134_EFX-FS9W-25FT-by-Scosche.html
Reply · Report · Sonic Electronix SStaff on Dec 19, 2014
· Add Answer · I Have This Question Too (0)
PPi website useless... Can't find this amp's manual.
Will this run "3-way"? (2 ohm components on front channel, 2 (4ohm) subs on rear channel bridged)
It looks like some class D amps can't run "3-way"???
CohoCarl on Nov 5, 2014
Best Answer: Hello Mike,

This amp will NOT fair well with having a Different Impedance ran across it. We suggest a traditional 3 Channel amp MEANT to allow such an application.
Reply · Report · Customer SStaff on Nov 5, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

i520.4

UPC

709483044395

Weight

4.50lbs

Internal SKU

i5204

Internal Product ID

68789

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 i520.4

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