3.3 out of 5 based on 19 customer ratings
19 Review(s) | Write a review

Riot 400W 4 Channel Full Range, Class A/B Amplifier Dim:7.75"L 9"W 2"H

  • Weather Proof 400 W MAX Power 4 Channel
    75 W X 4 RMS @ 2 ohm
    38 W X 4 RMS @ 4 ohm
  • Full Range, Class A/B,
  • High and Low Level Inputs,
  • Dimensions: 7.75" L x 9" W x 2" H
California Prop 65 Warning

What is Proposition 65?

Proposition 65 is a California law that applies to companies selling products in California. Proposition 65 requires warnings if a product contains any listed chemical present above very low levels. Proposition 65’s warning standards are among the most stringent in the world. Proposition 65 is not a product safety law, but rather a "right-to-know" law. Businesses are required to provide warnings to comply with Proposition 65.

There are over 800 chemicals on the Proposition 65 list, which is administered by California's Office of Environmental Health Hazard Assessment (OEHHA), a part of the California Environmental Protection Agency. The list includes naturally occurring and man-made chemicals. Proposition 65 warnings can be seen for a wide variety of everyday consumer products, including electronic equipment, and warnings can be seen posted throughout California in a variety of establishments such as buildings, hotels, restaurants, coffee shops, and stores.

Why do you see the warning on our packaging and website?

The warning is part of our ongoing effort to comply with the California Safe Drinking Water and Toxic Enforcement Act of 1986 (known as "Proposition 65").

California Prop 65 Warning

WARNING: Cancer and Reproductive Harm -

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U.S. Lower 48 States
60 Day Money Back
Hassle Free Returns
Standard Warranty 1 Year
Extended Warranty 2 Year
Tech Support
Live Chat or Call 805-751-4853

General Specs

Channel Configuration
4 Channel
Amp Topology
Full Range, Class A/B

Performance Specs

Total Power Output
400 Watts
Peak Power @ 2 Ω
100 Watts x 4
Peak Power @ 4 Ω
50 Watts x 4
RMS Power @ 2 Ω
75 Watts x 4
RMS Power @ 4 Ω
38 Watts x 4
Speaker Impedance
2 to 8 Ω
T.H.D. (Total Harmonic Distortion)
0.01 %
Channel Separation ≥
60 dB
S/N Ratio (A-Weighted)
90 dB
Frequency Response
12 Hz to 22 kHz ±1 dB

Connections, Controls, and Processing

RCA Inputs
4 Channel
High Level Inputs
Thermal/Overload/Short Protection

Extra Features



5 out of 5

Can't beat it for the money

For the money, I find it hard to believe that you can be upset with this unit. Using it to push a Rockford Phosgate 8" sub. Does plenty to add some bass to my little boat. We have four 6.5" speakers in the boat that needed some help on the low end, and this amp with the one sub was perfect.
4 out of 5

Good enough

This is what I expected not the best but still a good amp. Might be better if I took the time to install a crossover. I bought the weather proof because it was going in a Jeep. The weather proof along with the compact size allowed me to put it under a seat. Easy install, I recommend using an amp install kit.

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