Will this amp push two Rocksford fosgate 4 ohm 12" subs

For 2 12" R2D4's I'd suggest going for the R1200.1D. Should be more than enough to power them. I'm using it for 2 10" R2D2's and a single 12" R2D4 all wired up together at 1 ohm.

With the P600x4 . I want to power my 6.5 components and a set of 6x9's all of which are about 100 watts RMS each. What is the RMS @ 4 ohms on amp

I would look at other amps. One of these doesn't have enough power for my doors. Their 2 channel does a decent job on 4 6x9. Their anticlip feature leads to amp cutting in and out annoying feature.

Is this amp 2ohm stable?

Yes sir.. it is 2ohm stable. I'm running a single 10" 4ohm DVC bridged to the rear channel with (2 0hm) 6x9s running off the front channel in the rear deck and it sounds great. As long as you dial it in as per the C.L.E.A.N. instructions you'll be really happy with this RF amp.

What is the true rms power on the 600x4? I know these amps are under rated

The short answer is above 600 rms total. Every amp comes with a birth sheet that shows the results of a Amp dyno test performed on the amp. Mine was 191 rms per channel @ 2 ohms which translates to 764 rms total. Every amp sold by Rockford is underrated so expect to see a larger rms rating than advertised. I've seen birth sheets for this specific model ranging from 750 rms up to the high 900 rms range.

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Rockford Fosgate P400X4 Punch 400-Watt 4-Channel Amplifier

Product ID: 1164824

Details

Brand
Rockford
Item dimensions L x W x H
11 x 7.8 x 2.4
Manufacturer
Rockford
Mounting Type
Car Mount
Voltage
12 Volts

⚡400W total power output

🔊4-channel versatile design

🎚️On-board +18dB Punch EQ boost

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Description

🎵 Elevate your drive with punchy power and precision sound!

PLUG PLAY RCA INPUTS - Accepts both high and low-level signals without extra converters, simplifying your installation.
TAILORED SOUND CONTROL - Features variable 12 dB/Oct Butterworth crossovers and a +18dB boost at 45Hz for deep, punchy bass.
ROCKFORD FOSGATE RELIABILITY - Built with legendary quality and backed by a 1-year warranty to keep your system running strong.
POWER YOUR RIDE WITH PRECISION - Delivers up to 100W per channel at 2-Ohm for crystal-clear sound across all four channels.
ULTIMATE MULTI CHANNEL FLEXIBILITY - Supports 4-way full-range or 3-way with subwoofer setups, adapting perfectly to your vehicle’s audio needs.

The Rockford Fosgate P400X4 is a compact yet powerful 400-watt 4-channel amplifier designed for versatile vehicle audio setups. It delivers up to 100 watts per channel at 2-Ohm, supports both high and low-level RCA inputs, and includes advanced sound-shaping features like a +18dB Punch EQ boost and adjustable Butterworth crossovers. Engineered with Class A/B topology and backed by a 1-year warranty, it’s the perfect upgrade for audiophiles seeking crisp, customizable sound on the road.

Specifications

ASIN	B00BF6HZ6K
Best Sellers Rank	#49,752 in Electronics ( See Top 100 in Electronics ) #92 in Car Multichannel Amplifiers
Brand Name	Rockford Fosgate
Customer Reviews	4.6 4.6 out of 5 stars (280)
Global Trade Identification Number	00780687342272
Included Components	P400X4
Item Dimensions	11 x 7.8 x 2.4 inches
Item Weight	3.15 Kilograms
Manufacturer	Rockford Fosgate
Maximum Output Power	100 watts per channel
Model	P400X4
Mounting Type	Car Mount
Number of Channels	4
Output Power	400 Watts
Part Number	P400X4
UPC	780687342272 739197278595 796327931423
Unit Count	1.0 Count
Voltage	12 Volts
Warranty Description	1-Year Manufacturer Warranty

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$834.57

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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TrustScore 4.5 | 7,300+ reviews

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