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Crunch P900.4

900W Max, PowerZone Series 4-Channel Amplifier

Discontinued
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Crunch PZT900.4

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Crunch P900.4

900W Max, PowerZone Series 4-Channel Amplifier

$89.99

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  • PowerZone Series 4-Channel AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 57.5 watts x 4 chan.
    • 2 ohms: 112.5 watts x 4 chan.
    • Bridged, 4 ohms: 225 watts x 2 chan.
  • Dynamic (Peak) Power Rating:
    • 4 ohms: 115 watts x 4 chan.
    • 2 ohms: 225 watts x 4 chan.
    • Bridged, 4 ohms: 450 watts x 2 chan.
  • MOSFET power supply
  • LED power and protection indicators
  • Tuned Bass EQ (0-12 dB bass boost at 45 Hz)
  • Speaker-level inputs with soft turn-on
  • DC, short, thermal, overload protection
  • Illuminated CRUNCH logo
  • Variable high-pass filter (60-1200 Hz, 24 dB/octave)
  • Variable low-pass filter (30-250 Hz, 24 dB/octave)
  • Variable input level control: 0.2V-5.0V
  • Frequency response: 30-1,200 Hz
  • Dimensions: 11.81"L x 10"W x 2.16"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 SonicElectronix.com warranty

Product History:

Crunch PZ900.4 thumbnail
(newest, current model)
Crunch PZA900.4 thumbnail
(previous model, replaced by Crunch PZ900.4)
Crunch PZT900.4 thumbnail
(previous model, replaced by Crunch PZA900.4)
Crunch P900.4 thumbnail
(previous model, replaced by Crunch PZT900.4)
Crunch PZi-125.4 thumbnail
(previous model, replaced by Crunch P900.4)

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.

57.5 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.

112.5 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.

225 watts x 2 channels

Power Specifications - Subwoofer Channel

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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
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 speaker(s) or subwoofer(s) equals 1 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.

Power Specifications - Full Range Channels

Peak Power @ 4 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Peak Power @ 2 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Peak Power @ 1 ohm
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Bridged Peak/Max 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 Peak/Max power created once an amplifier is bridged.

Power Specifications - Subwoofer Channel

Peak Power @ 4 ohm
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Peak Power @ 2 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Peak Power @ 1 ohm
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

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.
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.
4
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

900 watts
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.

450 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.
4 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
2 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.
0.05%
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)
Full (AP)
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.

60 - 1200 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 - 250 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.
90 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.
80 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.
20A x 2 
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.
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.
Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
Hi-Res Audio Compatible
This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.

Specials with this Item

Promotions
Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

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
100%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.9
Value
5.0
Features
4.9
Design
4.6
Usability
4.9
I Have a Loud Car!

Los Angeles, Ca

Overall
Durability
Value
Features
Design
Usability
Great Amp for the Price!!!

April 22, 2009

This is a great amp! powering four components without a problem! Maxxonics has always been reliable to me! This amp is great for the money! You will be heard!

7 of 8 found this helpful

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LP

California

Overall
Durability
Value
Features
Design
Usability
Great And Underpriced

April 10, 2009

I have this amp and was extremly surprised with the clear signal I had chosen this amp because it was reasonably priced and had already overspent on a Pioneer CD deck and two pairs of Infinity Components. This amp sounds great and last for hours It ids not easily overheated. It has been underpriced and should not be judged by price. It is running 4 tweeters and 4 midrange woofers in a 1998 S10. I'm heard down the block and rattling store windows and displays.
Car alarms will be set off with the right pair of subs

6 of 7 found this helpful

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lele

New York

Overall
Durability
Value
Features
Design
Usability
Very good Quality

March 3, 2009

This item I purchase a few moth ago and really does the work. I use this amp with 4 whip audio and real hit hard!!!

6 of 7 found this helpful

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K121M1N4L

Dallas, TX

Overall
Durability
Value
Features
Design
Usability
Great Amp

May 10, 2010

This right here is a great amp.
Sounds Good Powering my 4 Kenwood 3-ways.
The blue logo looks nice at night.

4 of 5 found this helpful

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don gabo

east chicago

Overall
Durability
Value
Features
Design
Usability
you will be suprise

January 23, 2009

i got this amp running my rear 6.9 speakers if your and also my component door speaker 5 1/4 with a additional pair of separate set of tweeters and wow i hook it up last night i had a neighbor think i had a woofer and thats no lie. I bought this amp because it was cheap and thought ill get anything for now This amp is not just good for the money, its good period!

4 of 5 found this helpful

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jason

Mesa, AZ

Overall
Durability
Value
Features
Design
Usability
nice amp

July 10, 2009

does what its told. used a voltmeter to find the highest value possible for my infinity components. Am powering a set of infinity kappas up front and a set of infinity reference in the back.

3 of 4 found this helpful

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chazkez08

Fredericksburg, VA

Overall
Durability
Value
Features
Design
Usability
great amp.

February 8, 2010

i dont know too much about amplifiers but i haven't had any problems with this one. provides plenty of power and doesn't run hot after hours of use.

2 of 3 found this helpful

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Rasta

Ft. Lauderdale, Florida

Overall
Durability
Value
Features
Design
Usability
Loud!!!

November 26, 2009

I was looking for an amp that could provide clean crisp sound, at a low cost. I have it powering 4 6.5's and 2 6x8's full range speakers (VR3's). The amp is set @ 120hz for the front channel and 85hz rear on high pass frequency, with the front and rear gains set @ half. If your looking to build a system on a budget get this amp seriously, you will not be disappointed. The only regret was not purchasing it from Sonic Electronics so i paid about $35 more.

2 of 3 found this helpful

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Browse 10 questions and 38 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Easy shopping and great prices!
Matt B on Nov 24, 2016
Because it has a cross over capable of running active on door speakers and does rated power.
Clay A on May 6, 2016
Goes great with the Polk Audio MM651UM's I ordered for my boat.
Alexander M on Jun 13, 2016
Bench tested by Sonic and well over the rated RMS. Unable to improve sound quality without spending an insane amount of money for car amplifier. If it lasts a couple of years, I'll get my money out of it.
John P on Apr 14, 2016
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
Crunch P900.4
Crunch 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
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How do i bridge this amp? would i put front left or right positive to the opposite? for example, if i put the + in the front left, do i put the negative in the front right?
Carl S on Jan 20, 2015
Best Answer: Use the R+ and L- terminals for the speaker connections. The manual didn't say, but since there is no bridge mode switch you'd have to feed the same RCA signal to both the R and L RCA inputs using a splitter.
Reply · Report · Peter F on Jan 21, 2015
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Where should the push buttons that say 1x and 10x freq on crosovers be set and does it matter where the low pass and high pass filters are set when the switches are set to full ? or should they be opened all the way up ? Running active off Prs 80 and using this amp for highs and mids.
Rm W on Jan 11, 2015
Best Answer: For mids choose what frequencies you want the speakers to play. Use one of the front or rear channels. Example: set HPF to 1x around 80 to 120 Hz. and LPF to 10x around 800 Hz in bandpass mode.

For highs use the opposite front or rear channel. Example: set HPF to 10x around 800 Hz in HPF mode.

Choose the cutoff freq based on the frequency ranges of the speakers and where it sounds good.

I believe when the amp in in FULL mode, the HPF and LPF are bypassed so it doesn't matter where the low pass and high filters are set.

1x and 10x multiplies what ever freq you have set by 1 or by 10.
HPF = high pass only
BPF = high pass and low pass together
Full = all frequencies. No filters used.

I'm just a audio enthusiast not a profession and not sure the exact frequencies you should use.
Good Luck
Reply · Report · Ryan J on Jan 13, 2015
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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: This amp will run four channels or two channels (stereo). It could run two subs, or two coax speakers, etc. It will NOT run a pair of normal speakers AND a single voice coil sub without having a dead channel and lost power. You could run a pair of speakers and a dual voice coil sub... All that said, I suggest you get the five channel version of this amp for your install, or better yet get the mono amp version of this for your sub and run another amp for your speakers. These are great amps and they run well and at relatively cool temps. The only issue I found is the poorly placed Phillips screw terminals. Be careful not to strip them!
Reply · Report · Eric G on Aug 18, 2014
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How many amps does this draw? What size fuse would I need for this amp, if the fuse was placed in a distribution block.
Larry R on Sep 1, 2015
Best Answer: Use this formula to determine current draw.
1 How many watts do you plan on using?
2 what is the efficiency of the amp? (P900.4 is 83% at 4 ohms and 75.8% 2 ohms)
3 What is the voltage going into the amp? (example car battery) 12v, 13.6v etc..

Watts / efficiency = X, then
X / Voltage = Current draw

900 watt amp at 83% efficiency needs (900/.83) 1084w from the charging system.
At 13.6v (1084w/13.6v) that's 79.7 Amps

That would be the volts playing a pure sine wave. Music would be about half that or less. Depends on the type of music. Make sure your wire can handle the currrent and use a fuse at or under that current draw.
My amp was very efficient with my 13.6 volts. No light dimming. Along with my car battery I had an additional small 600 watt kenetik battery.

Sorry so technical, hope this helps
Reply · Report · Ryan J on Oct 31, 2015
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I plan on putting a LC2i before this amp from my factory radio. I assume I will need y splitters RCAs between the LC2i and the amp.I realize I lose fader control but is this the correct way to do this or should I have ordered a LC6i? I just plan on running 4 door speakers(front and rear).
A shopper on Jul 18, 2016
Best Answer: Hello,

Splitting the signal will also split the quality of the signal. This defeats the purpose of the LC2i's main benefit. However, the amplifier itself has the ability to split the signal for you, with far less loss than physically splitting it with an RCA.

http://www.sonicelectronix.com/pictures_new.php?id=38338&picture_id=860584

The ST / 4ch switch is intended for install like your own, where you only have one set of RCAs to provide.
Reply · Report · Rick MStaff on Jul 18, 2016
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how would i wire 2-DCS1654 6 1/2" Classic Subwoofers svc-4 Ohm in the bottom of doors and PHD 5 1/4 - 4 ohm plus 4 ohm tweeter in uper doors i have PPI-900.4 Amplifier and PPI-1000.1 Amplifier for 2-LS1044 10" Low Profile Subwoofer Dual 4 Ohm
in 96 dodge ram what would be the best way to setup?
charles m on Sep 30, 2016
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Does this amp have balanced differential inputs?
Tom R on Jun 17, 2016
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Does this amp have balanced differential inputs?
A shopper on Jun 17, 2016
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Product Summary

Manufacturer

Model Number

P900.4

UPC

806576215028

Weight

8.00lbs

Internal SKU

cru-p9004

Internal Product ID

11757

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: Crunch P900.4