BOSS Audio Systems R1100M 1100 Watt Monoblock Car Amplifier
- 1100 watts maximum output, monoblock
- Class A/B, MOSFET power supply
- 2 ohm stable, 2/4 ohm per title
- Variable low pass crossover and bass boost
- Remote subwoofer level control included
- 9.21 by 10.43 by 2.24 inches, 4.4 pounds
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A single-channel car amplifier for driving one or more subwoofers, aimed at a first car audio upgrade. It is a bass amp only, with no full-range channels.
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ASIN: B004S4XNEOModel: R1100MCategory: Amplifiers
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Overview
BOSS Audio sells the R1100M as a monoblock with a MOSFET power supply. A variable low pass crossover and bass boost shape the output, and the remote knob adjusts subwoofer level from the driver seat.
The reason to buy is high rated output and controls that suit a first subwoofer install. The limit is that it is one channel, and the maximum power figure is a peak number rather than a continuous rating.
Who it's for
A trunk with a sub and a short wiring run suits it. People who need clean power for full-range speakers, or who want to know continuous output, should look at a multi-channel model.
Pros and cons
- High maximum output
- MOSFET power supply
- Variable low pass crossover
- Bass boost control
- Single channel only
- Peak power figure
- Warranty limited to Amazon-sold units
- Continuous power not listed
Performance notes
A Class A/B design trades some efficiency for lower noise. The low pass crossover removes higher frequencies so only bass reaches the subwoofer. Real output depends on the vehicle power system and speaker load.
Where it stands among amplifiers
- #8 most-searched brand and model of the 48 amplifiers lines we track (by search demand, not sales).
From the specs of the 15 amplifiers we list; not a test result.
Specifications
| Brand | BOSS Audio Systems |
|---|---|
| Model | R1100M |
| Dimensions & fit | |
| Item dimensions | 9.21 x 10.43 x 2.24 inches |
| Item weight | 4.4 pounds |
| Capacity & performance | |
| Maximum output power | 1100 watts |
| Output power | 1100 watts |
| Power & efficiency | |
| Maximum supply voltage | 12 volts |
| Minimum supply voltage | 12 volts |
| Construction & materials | |
| Material type | Metal |
| Included components | |
| Included components | Boss Audio R1100M Riot 1100-Watt Monoblock, High Input Cable With Connector, Instruction Manual, Mounting Screws, Remote Subwoofer Level Control |
| Warranty & support | |
| Warranty description | 6 Year Platinum Online Dealer Warranty valid only on products Sold / Shipped by Amazon.com |
| Other details | |
| Number of channels | 1 |
| Specification met | FCC |
Frequently asked questions
How do you adjust the BOSS R1100M?
It has a variable low pass crossover and bass boost, and the included remote knob changes subwoofer level.
What comes with the R1100M?
The amplifier, a high input cable with connector, an instruction manual, mounting screws and a remote subwoofer level control.
Is the R1100M a full-range amplifier?
No. It is a monoblock subwoofer amplifier with one channel.