BOSS Audio Systems R1004 Riot 4-Channel Car Amplifier

The BOSS Audio Systems R1004 Riot is a compact 4-channel Class A/B car amplifier delivering up to 400 watts peak power and stable operation from 2 to 8 ohms for clearer, fuller in-vehicle sound.

Built for first-time upgraders and budget-conscious audio enthusiasts, the R1004 Riot amplifier combines a MOSFET power supply, flexible inputs, and straightforward controls in a compact 7.75" x 9" x 2" chassis. It’s designed to boost factory or aftermarket head units, drive four speakers, or bridge channels for higher-power configurations, while keeping installation and tuning simple.

How much power can this amp deliver to my speakers?

The R1004 offers peak power headroom while providing reliable continuous output across common loads. Ratings indicate 100 watts max per channel at 2 ohms and 50 watts max per channel at 4 ohms, suitable for driving door speakers or a small set of component speakers.

• Max power: 400 watts total peak (100W x 4 at 2Ω)
• 4-channel configuration for full-range speaker setups
• 2–8 ohm impedance range for speaker compatibility
• Compact size: 7.75" x 9" x 2" for tight mounting spaces

What inputs and controls will I use to set it up?

The amplifier accepts both low-level (RCA) and high-level (speaker-level) inputs, so it integrates with factory radios as well as aftermarket receivers. A variable input gain helps match the amp’s sensitivity to your head unit output without acting as a volume control.

• Low-level RCA inputs for aftermarket head units
• High-level speaker inputs for factory radios without RCA
• Variable input gain control to prevent distortion and optimize signal
• Single 15A ATO blade fuse for protection and easy replacement

How does the R1004 affect sound quality and reliability?

Using Class A/B topology with a MOSFET power stage, the Riot R1004 balances efficiency and audio fidelity for everyday listening. The amplifier reports a low total harmonic distortion (THD) and a broad frequency response to preserve clarity from bass to treble.

• Class A/B design for controlled output and musical detail
• THD @ RMS: 0.01% for minimal harmonic coloration
• S/N ratio: 90 dB for reduced background noise
• Frequency response: 12 Hz–22 kHz to cover most audio content

What installation and support should I expect?

The R1004’s slim footprint and versatile input options make it suitable for many vehicle interiors; still, professional installation is recommended to ensure safe wiring and correct gain setting. BOSS Audio Systems backs purchases made through authorized online dealers with an extended warranty for added peace of mind.

• Mounting-friendly dimensions for under-seat or trunk installs
• Recommended professional installation to protect vehicle electronics
• 6-year Platinum Online Dealer Warranty when purchased via Amazon
• Weight: 3.09 lbs, single 15A fuse for serviceability

Who is this for? The BOSS Audio Systems R1004 Riot amplifier is ideal for drivers who want a clear, affordable power upgrade to factory or entry-level aftermarket audio systems. It suits those converting a factory radio to RCA control or anyone needing a compact, four-channel amp to power full-range speakers or bridge two channels for a sub. If you want measurable performance improvements without complex tuning or a large budget, the R1004 offers practical power, flexible inputs, and reliable specifications for everyday listening.