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Precision Power PPI S420.2

420W Max, Sedona Series 2-Channel Amplifier

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List price $189.95

$79.99

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Arrives by Wednesday, July 16 to zip 20147

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23657

426

Precision Power PPI S420.2

$79.99

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  • Sedona Series 2-Channel Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 130 watts x 2 chan.
    • 2 ohms: 210 watts x 2 chan.
    • Bridged, 4 ohms: 420 watts x 1 chan.
  • PWM MOSFET power supply
  • Variable Bass Boost (0, 6, 12 dB at 50 Hz)
  • IDI Intelligent Distress Indicator for thermal, short, and impedance protection
  • Dash mount remote gain control included
  • Brushed aluminum finish
  • Platinum 4 AWG power block
  • Infinitely variable crossovers with multipliers (high/low/band)
  • Turn on/off delay
  • Tri Mode capable
  • High and low inputs
  • Variable high-pass filter (15-3800 Hz, 12 dB/octave)
  • Variable low-pass filter (50-4000 Hz, 12 dB/octave)
  • Subsonic Filter (35 Hz)
  • Frequency response: 10-39,000 Hz
  • Stereo separation: 55dB
  • Signal-to-noise ratio: 106dB
  • Damping factor: 281
  • Total harmonic distortion: 0.03%
  • Input sensitivity: 0.2V-6V
  • Fuse: 25A x 2
  • Dimensions: 15-1/3L x 9-1/2W x 2-1/3H
  • 8-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 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.

130 watts x 2 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.

210 watts x 2 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.

420 watts x 1 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.
Sedona (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.

AB
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.
2
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.

420 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.
0.03%
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.

15 - 3800 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.

50 - 4000 Hz
Subsonic Filter
Allows you to block (filter) ultra-low frequencies that your subs cannot reproduce.
0 - 35 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.
106 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.
45Hz @ 12dB
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.
Yes
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.
25A 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.

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
50%
4 Star
0%
3 Star
0%
2 Star
50%
1 Star
0%

Average Attribution Rating

Durability
3.5
Value
5.0
Features
4.5
Design
3.5
Usability
4.0

C-squared

DFW, TX

Overall
Durability
Value
Features
Design
Usability

Nice features, rated power, but gets too hot

July 16, 2012

This is a nice amp with great features that puts out rated power (tested with a multimeter and oscilloscope). You would be hard-pressed to find similar features at this power class and price point. Unfortunately, there is a reason: this thing gets too hot! Bridged @ 4-ohms for 420W RMS (which it actually does), this amp goes into protection mode after about 30 minutes of heavy use. At low volume or with cool air (A/C from the cabin) flowing across it, it is fine, but in the trunk mounted to the back seat (where most subwoofer amps would go) it overheats and shuts off. I added a couple 120mm fans to help alleviate this, and while it does help, it still shuts off occasionally when it is 100+ degrees outside. For this reason alone, I can not recommend this amp unless you can mount it inside the cabin with some airflow across the heatsink. Once this gets fixed, PPI will have a definite price:performance winner. For any naysayers, yes, the appropriate sized cable was used (4AWG) with good bare-metal grounds (checked with a DMM), the gains were set correctly using an oscilloscope, and it was not stuffed in a space with no ventilation. There is absolutely nothing wrong with the install (not my first rodeo), it is the amp itself.

0 of 0 found this helpful

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c ballz

brooklyn park, MN

Overall
Durability
Value
Features
Design
Usability

good quility amp no made up max power numbers

February 19, 2012

With all the "1000w max" or whatever amps on here people probly pass this one up seeing 420w but this amp is bigger and heavier then alot of these off brand 2000w whatever amps on here. This amp probly actually puts out steady what it says maybe more, not some amp that made 3000 watts @ 20v for one second before it was destroyed in a testing facility. Have it pushing one orion xtr 12 dual 2 ohm sub in my friends lancer and its obnoxious. Easily mistaken for two decent 12s. Low pass filter settings dont make much sence compared to most amps so i have it 3 stars for ease of use. also im not a fan of these style terminals for power wire, but they do hold secure.

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Product Summary

Manufacturer

Model Number

S420.2

UPC

709483035898

Weight

10.00lbs

Internal SKU

s4202

Internal Product ID

23657

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 S420.2