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Precision Power PPI PC640.4

640W Power Class Series 4-Channel Amplifier

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• 4 ohms: 115 watts x 4 chan, 2 ohms: 160 watts x 4 chan
• 640W RMS
• Large TO218 MOSFET Transistors
• Triple Darlington Audio Output Stages
• Close Tolerance Signal Path Components
• Extra Low Current Drive Stage

Learn more about the pc6404

We apologize

This item has been discontinued

Product Highlights


• 4 ohms: 115 watts x 4 chan, 2 ohms: 160 watts x 4 chan
• 640W RMS
• Large TO218 MOSFET Transistors
• Triple Darlington Audio Output Stages
• Close Tolerance Signal Path Components
• Extra Low Current Drive Stage

Description


Precision Power brand icon

Authorized dealer

  • Power Class Series 4-Channel Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 115 watts x 4 chan.
    • 2 ohms: 160 watts x 4 chan.
    • Bridged, 4 ohms: 320 watts x 2 chan.
  • Individually regulated preamp/crossover power supplies ensure signal purity
  • Low ESR capacitance banks compensate power supply ripple currents
  • Extra low current drive stage increases efficiency and sound clarity
  • Large TO218 MOSFET Transistors
  • Full signal path low noise/distortion circuitry topology
  • Wired remote bass level control included
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +12 dB bass boost at 30-90 Hz)
  • 4/3/2 Channel operation
  • Differential drives divide pre-amp and power-amp stages, eliminating ground looping
  • Close tolerance signal path components - 1% resistors and 5% capacitors
  • Sequenced delays eliminate residual power-up/power-down pops
  • Differential RCA inputs isolate 12V/audio to ground
  • Triple Darlington audio output stages
  • 2 Oz. Copper traces transfer high volume internal current
  • 3-Way System Protection circuitry (thermal, overload, and speaker short protection)
  • Separate capacitor charging/discharging current paths prevent rail switching spikes and ground traces from entering signal stages
  • Heavy duty aluminum alloy heatsink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Gold-plated screw terminals
  • Input sensitivity:
    • Level: 200mV-9V
  • Variable high-pass filter (15-4,000 Hz, 12 dB/octave)
  • Variable low-pass filter (50-4,000 Hz, 12 dB/octave)
  • Damping factor (100Hz @ 4 Ohms): >3000
  • Frequency response: 15-50,000 Hz
  • Dimensions: 17-1/4"L x 10"W x 2-5/16"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.
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
115 watts x 4 channel
RMS Power @ 2 ohms
160 watts x 4 channel
RMS Power @ 1 ohm
Not Stable
Bridged RMS Power
320 watts x 2 channel
Amplifier Specifications
Series
Power Class Series
Amplifier Class
A/B
Number of Channels
4-Channel
Total RMS Power Output
640 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
0.02%
Speaker Level Inputs
No
Preamp Outputs
No
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
15 - 4,000 Hz
Low-Pass Crossover Frequency
50 - 4,000 Hz
Signal-to-Noise Ratio
102 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
No
Fuse Rating
80A x 1 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

PC640.4

Weight:

12.50lbs

Internal SKU:

pc6404

Internal Product ID:

24412

Product and How-to Videos


Customer Ratings & Reviews



5 star
33%
4 star
33%
3 star
33%
2 star
0%
1 star
0%



Durability
2.7
Value
4
Features
4
Design
3.4
Usability
3.4

Customer Reviews

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You decide!

The Precision Power Amp is 1 of 3 I use in my outdoor system. JBL and JL Audio are the other 2. After about 6 months and about 36 hours of use the PPI unit went bad after sitting powered up (along with the other 2) for one hour, no music playing. I had to pay to send it in and provide a $20 money order to have it shipped back. Since I have not received it back yet and not had the chance to use it for a reasonable amount of time I'm not very confident of it's value. I have been told the older Amps from this company were much better. Meantime I've recplaced it with a Rockford Fosgate which I'm very happy with. I am 65 and very experienced with audio systems.

By jlaw99 on October 12, 2012

6

found this helpful.

Great sound quality amp

Let's start this out, I have never owned an old school PPI, so I can't compare the differences. But what I do know? Is this is supposed to be their top of the line? The amp is large and has a little weight to it, as expected. The amp does sound great and has some power. Haven't clamped, but I would imagine right around the numbers it claims. It really does sound great for the price. I can't think of anything better for the price if you're buying new. It can be run active, which is nice. Seems like many amps can these days.

Now for the bad: I can't stand the connector pieces to wire everything together. They are very difficult to work with, and when inserting them into the amp it is a bit difficult and seems as if you could break something. Next, the amp gets extremely hot. Even in a well ventilated area. If you commute a long way every day, it will need a fan. Or simply just get something else instead. Because when pushed hard and long it will go into protect
It's sad to know it does that. Just like sound streams amps. Such a great product to have that happen with.

The whole damping factor and all that. Pretty much pointless from my understanding as to what it should mean when pushing subs.

Overall, a great amp that does sound great, just some issues that need to be worked out, but probably never will.

By Bob on July 17, 2012

6

found this helpful.

A very good try!!

I bought 4 PPI amps in 1991 (Art Series) and wish I would have held on to them. But for the money that they sell for today, you can't go wrong with this amp.

By Old Man Audio on February 21, 2012

5

found this helpful.

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