MOSFET Power Supply
The BOSS Audio R1100M features a MOSFET power supply designed to support the amplifier’s internal electrical requirements.
MOSFET switching technology is commonly used in automotive amplifiers to convert the vehicle’s electrical supply into the voltages needed for amplification.
Proper battery condition, secure grounding, correctly sized wiring, and appropriate circuit protection are essential for reliable operation.
2-Ohm Stable for Flexible Subwoofer Installations
The R1100M supports compatible speaker loads as low as 2 ohms.
This gives installers flexibility when selecting aftermarket subwoofers and configuring voice-coil wiring.
Single-Subwoofer Installations
A compatible single subwoofer can be connected when its final impedance meets the amplifier’s requirements.
Dual-Subwoofer Installations
Multiple compatible subwoofers may also be connected when their combined impedance remains within the supported range.
Pro Street Tip: Always calculate final speaker impedance before connecting the amplifier. The R1100M is rated for a minimum 2-ohm load; it is not a 1-ohm stable amplifier.
Variable Low-Pass Crossover
The BOSS Audio R1100M includes a variable low-pass crossover that allows you to control which frequencies reach the connected subwoofer.
This is important because subwoofers are designed primarily to reproduce low-frequency audio.
A properly configured low-pass filter reduces unwanted midrange frequencies and helps the subwoofer blend with the vehicle’s full-range speakers.
For many car audio systems, approximately 80 Hz is a useful starting point, provided the amplifier’s adjustment range supports it.
Final settings depend on the subwoofer, enclosure, and vehicle acoustics.
Adjustable Bass Boost
The R1100M features adjustable bass boost for customizing low-frequency emphasis.
Bass boost can make certain frequencies sound more prominent, but excessive boost increases the demand placed on both the amplifier and connected subwoofer.
For initial setup, start with bass boost at its minimum setting.
Set gain and crossover controls correctly before adding additional low-frequency emphasis.
Excessive bass boost can contribute to clipping, overheating, and speaker damage.
Remote Subwoofer Level Control Included
The BOSS Audio R1100M includes a remote subwoofer level controller that allows convenient adjustment from the driver’s seat.
This is useful when switching between different music genres or adjusting bass levels for passengers.
The controller provides convenient level adjustment without requiring access to the amplifier itself.
It does not increase the amplifier’s maximum clean output.
For best results, calibrate the amplifier correctly before using the remote controller during everyday listening.
RCA and Speaker-Level Inputs
The R1100M supports both RCA line-level and speaker-level audio inputs.
This makes it useful for a variety of aftermarket and factory stereo installations.
RCA Inputs for Aftermarket Stereos
Connect the amplifier to a compatible aftermarket head unit using its RCA preamp outputs.
This is a common configuration for custom subwoofer systems.
Speaker-Level Inputs for Factory Radios
Many factory stereos do not provide RCA outputs.
The R1100M’s speaker-level inputs can accept compatible factory speaker signals, potentially reducing the need for a separate line output converter.
Some premium factory audio systems may still require specialized integration hardware or signal processing.
Always verify the factory stereo’s output characteristics before connecting the amplifier.
Built-In Thermal, Short-Circuit, and Overload Protection
The BOSS Audio R1100M includes integrated protection circuitry designed to respond to common operating faults.
Thermal Protection
Helps protect the amplifier when internal temperatures become excessive.
Short-Circuit Protection
Responds to certain electrical short-circuit conditions.
Overload Protection
Provides additional safeguards when the amplifier encounters excessive load conditions.
These protection features are helpful, but they do not replace proper wiring, speaker matching, ventilation, or gain calibration.
Compact Design with Illuminated BOSS Logo
The R1100M features a distinctive black amplifier housing with an illuminated BOSS Audio logo.
Its dimensions make it suitable for many traditional trunk and custom amplifier rack installations.
Physical Dimensions
| Measurement | Specification |
|---|---|
| Length | 10.43 Inches |
| Width | 9.21 Inches |
| Height | 2.25 Inches |
| Weight | 4.37 Pounds |
Before installation, measure available mounting space and allow additional clearance for wiring and airflow.
Avoid mounting the amplifier where it may be exposed to water, excessive heat, or physical damage.
Ideal for Entry-Level Subwoofer Upgrades
The BOSS Audio R1100M is particularly well suited for drivers installing their first aftermarket bass system.
Potential applications include:
- Single 10-inch subwoofer installations
- Single 12-inch subwoofer systems
- Budget-friendly daily-driver bass upgrades
- Factory stereo subwoofer additions
- Compact trunk audio installations
- Compatible sealed subwoofer enclosures
- Properly matched ported subwoofer systems
Subwoofer diameter alone does not determine compatibility.
Verify the connected subwoofer’s impedance and RMS power handling before installation.
DIY Stereo Wiring Diagrams and Installation Resources
Planning to install the BOSS Audio R1100M in your vehicle?
Identifying factory speaker wiring, audio signals, and amplifier connections is an important part of a successful installation.
My Pro Street Online provides vehicle-specific stereo wiring resources for enthusiasts upgrading their audio systems.
Honda Civic Stereo Wiring
Use the Honda Civic Stereo Wiring Diagram when identifying factory radio and speaker connections.
Nissan 240SX Stereo Wiring
Building an S13 or S14 audio system? Reference the Nissan 240SX Stereo Wiring Diagram before connecting aftermarket equipment.
Nissan Altima Stereo Upgrade
Consult the Nissan Altima Stereo Wiring Diagram when planning factory stereo integration.
Honda Accord Stereo Wiring
Reference the Honda Accord Stereo Wiring Diagram when identifying factory audio connections.
Explore additional DIY automotive audio tutorials at My Pro Street Online.
Pro Street Installation Tip: Speaker-level inputs carry audio signals, not amplifier operating power. The R1100M still requires its own properly fused battery power connection and secure ground.
BOSS Audio Systems R1100M Technical Specifications
| Specification | Details |
|---|---|
| Brand | BOSS Audio Systems |
| Model | R1100M |
| Series | Riot |
| Amplifier Type | Monoblock Subwoofer Amplifier |
| Amplifier Class | Class A/B |
| Maximum Power at 2 Ohms | 1100 Watts |
| Maximum Power at 4 Ohms | 550 Watts |
| Minimum Rated Impedance | 2 Ohms |
| Power Supply | MOSFET |
| Low-Pass Crossover | Variable |
| Bass Boost | Adjustable |
| Input Sensitivity | Adjustable |
| RCA Inputs | Yes |
| Speaker-Level Inputs | Yes |
| Remote Subwoofer Level Control | Included |
| Thermal Protection | Yes |
| Short-Circuit Protection | Yes |
| Overload Protection | Yes |
| Illuminated Logo | Yes |
| Length | 10.43 Inches |
| Width | 9.21 Inches |
| Height | 2.25 Inches |
| Weight | 4.37 Pounds |
| Intended Application | Dedicated Car Subwoofer Systems |
Installation Tips for the BOSS Audio R1100M
Before installation, verify that your subwoofer configuration presents a final impedance of at least 2 ohms.
Confirm that the subwoofer’s RMS power handling is compatible with the amplifier’s verified continuous output.
Choose a secure mounting location with adequate ventilation.
Use manufacturer-recommended power and ground wiring.
Install suitable circuit protection near the vehicle battery.
Connect compatible RCA or speaker-level input signals.
Verify speaker polarity and all wiring connections before applying power.
Set the low-pass crossover according to the subwoofer and overall audio system.
Start with bass boost at its minimum setting.
Calibrate amplifier gain using an appropriate measurement method to reduce the risk of clipping.
Connect the included remote subwoofer controller and verify its operation.
BOSS Audio recommends professional installation to help ensure proper and safe functionality.
Warranty Information
BOSS Audio Systems advertises a six-year Platinum Online Dealer Warranty for qualifying purchases made through Amazon.com, subject to the manufacturer’s warranty terms.
Purchases from other retailers may have different warranty coverage.
Before purchasing, review the applicable warranty policy and confirm coverage with the seller.
Do not assume the Amazon-specific six-year warranty automatically applies to purchases from Pro Street Online.
Why Choose the BOSS Audio R1100M?
The BOSS Audio R1100M offers an accessible way to add dedicated subwoofer amplification to a factory or aftermarket car audio system.
Its 2-ohm stable Class A/B design, MOSFET power supply, variable low-pass crossover, adjustable bass boost, and included remote subwoofer level controller provide practical features for entry-level bass installations.
RCA and speaker-level inputs offer flexibility when integrating the amplifier with different head units.
For drivers looking to build an affordable daily-driver subwoofer system, the R1100M is a practical starting point.
Upgrade Your Bass with Pro Street Online
Bring deeper bass to your vehicle with the BOSS Audio Systems R1100M 1100W Max Monoblock Class A/B Amplifier.
Pair it with a compatible aftermarket subwoofer, quality amplifier wiring, and the correct stereo integration hardware for your vehicle.
Explore more car audio amplifiers, subwoofers, aftermarket head units, and installation accessories at Pro Street Online.
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