850 Watt 4-Channel Amplifier P850.4
With four channels of serious PUNCH power, the P850.4 is a great amplifier for high-powered coaxial or component speakers. Allowing you to bridge the rear channels and add a 2-ohm DVC subwoofer, the P850.4 may be the only amplifier you'll ever need! For best performance a capacitor is recommended.
- Stealth Connections
- 4 Gauge power/ground connections with built-in ATC fusing
- Connector Cover
- Focused mass heat sink allows critical aluminum material to be located around hottest internal devices
- Top Mounted LED Indicators
- Thermal Sensing
- Infrasonic filter
- Aux Ouputs
- 1 Year Warranty
These Avatars are a personal signature from the Rockford Fosgate team member(s) who designed and engineered ...Learn more
Engineered In The USA
These Avatars are a personal signature from the Rockford Fosgate team member(s) who designed and engineered this fanatic product. This statement illustrates our commitment to being Designed and Engineered in the U.S.A.
Rockford Fosgate amps use MEHSA, a thermal substrate that maximizes heat transfer between MOSFET power devices ...Learn more
Rockford Fosgate amps use MEHSA, a thermal substrate that maximizes heat transfer between MOSFET power devices and heat-sink. The MEHSA substrate is so efficient at reducing MOSFET temperatures, it lowers distortion, increases durability and results in a prolonged life span.
Trans•ana is a Class A/B topology that simplifies the signal path of the amplifier allowing the ...Learn more
Trans•ana is a Class A/B topology that simplifies the signal path of the amplifier allowing the signal to travel through the amplifier at a lower voltage. The result is greater reliability and exceptional sound quality.
NOMAD is a "real time" analog computer that protects your amplifier from shorting speaker wires and ...Learn more
NOMAD is a "real time" analog computer that protects your amplifier from shorting speaker wires and dangerously low speaker impedances.
(left-OLD | right-NEW)
Rockford Fosgate amps use custom TO-247 MOSFETs. These have 60% more ...
(left-OLD | right-NEW)
Rockford Fosgate amps use custom TO-247 MOSFETs. These have 60% more metal tab area for more power capacity, lower impedance and improved heat dissipation over traditional TO-220 MOSFETs found in competitor amps.
Onboard equalizer with up to +18dB @ 45Hz.Learn more
Punch Bass EQ
Onboard equalizer with up to +18dB @ 45Hz.
(Sum of Rated Power)
(RMS Continuous Power)
210 Watts x 4 @ 2-Ohm
425 Watts x 2 @ 4-Ohm Bridged
Input switch: 2/4 ch.
Low-Pass (LP): 40-400Hz 12dB/octave Butterworth
5.3 x 27.9 x 44.9 (cm)
Knowledge Base Articles
Ask Our Experts
Contact the Authorized Rockford Fosgate Dealer you purchased this product from. If you need further assistance, call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.
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