Front Speaker Upgrade
Connect compatible front coaxial or component speakers to channels one and two for improved system flexibility.
Rear Speaker Upgrade
Use channels three and four to power compatible rear door or rear deck speakers.
Complete Four-Speaker System
Power four properly matched speakers from one compact amplifier chassis.
For component speaker systems, retain the correct passive crossover networks unless the speaker manufacturer specifies another configuration.
BOSS Audio R1004 Power Ratings
| Speaker Configuration | Advertised Maximum Output |
|---|---|
| Four Channels at 2 Ohms | 100W × 4 |
| Four Channels at 4 Ohms | 50W × 4 |
| Total Advertised Maximum Power | 400W |
| Supported Speaker Impedance | 2–8 Ohms |
Important: These figures are maximum power ratings, not continuous RMS output ratings.
For speaker matching, use the manufacturer’s verified RMS specifications rather than assuming the R1004 delivers 400 watts continuously.
The amplifier’s listed 15A fuse also reinforces the importance of distinguishing advertised maximum power from sustained output.
Class A/B Amplifier Design
The BOSS R1004 uses Class A/B amplifier topology, a traditional design commonly found in aftermarket car audio equipment.
Class A/B amplification combines characteristics of Class A and Class B operation to provide audio amplification with improved efficiency over pure Class A designs.
For entry-level car audio installations, this architecture provides a familiar and practical way to power aftermarket speakers.
As with any amplifier, correct gain settings, speaker impedance, and electrical connections are essential for reliable performance.
MOSFET Power Supply for Stable Operation
The R1004 features a MOSFET-based power supply designed to manage electrical power within the amplifier.
MOSFET technology is commonly used in automotive amplifiers because it allows efficient electronic switching and voltage regulation.
This supports the amplifier’s operation across the electrical conditions encountered in a properly functioning vehicle.
The MOSFET power supply does not eliminate the need for correct battery wiring, grounding, or fuse protection.
Full-Range Audio Performance
With a manufacturer-listed frequency response of 12 Hz to 22 kHz, the BOSS Audio R1004 is designed for full-range speaker amplification.
This makes it suitable for compatible aftermarket coaxial speakers and component speaker systems.
Although the amplifier’s frequency-response specification extends into the bass range, smaller door speakers may not safely reproduce deep bass at high output.
Use suitable crossover settings in the head unit or external audio processor when required by your speakers.
Compact Design for Easy Installation
The BOSS R1004 measures approximately 7.75 inches long, 9 inches wide, and 2 inches high, making it relatively easy to accommodate in many vehicle interiors.
Potential mounting locations include appropriately ventilated areas beneath seats, inside protected cargo compartments, or on custom amplifier mounting panels.
Its 3.09-pound listed weight also makes it manageable for straightforward installations.
Before purchasing, measure your available mounting space and allow additional clearance for wiring and ventilation.
Upgrade Your Factory Stereo Without Replacing the Radio
Adding a four-channel amplifier can be a practical way to improve an existing factory stereo system.
However, factory radio integration depends on the vehicle and amplifier input requirements.
If your factory stereo lacks compatible low-level RCA outputs, you may need a line output converter or vehicle-specific audio integration interface.
Factory premium sound systems may require additional hardware or signal processing.
For the cleanest installation, identify the factory speaker wiring and audio signal connections before removing the radio or modifying the harness.
DIY Stereo Wiring Diagrams and Speaker Installation Guides
Planning to install the BOSS Audio R1004 in your vehicle? My Pro Street Online provides automotive wiring references to help with aftermarket stereo and speaker upgrades.
Honda Civic Stereo Wiring
Use our Honda Civic Stereo Wiring Diagram to help identify factory radio connections and speaker wiring before installing an aftermarket amplifier.
Nissan 240SX Stereo Upgrade
Building an S13 or S14 audio system? Review the Nissan 240SX Stereo Wiring Diagram when replacing the factory head unit or upgrading the speaker system.
Nissan Altima Speaker Wiring
Our Nissan Altima Stereo Wiring Diagram provides a starting point for identifying factory audio connections during a four-channel amplifier installation.
Find additional DIY car audio installation tutorials and electrical resources at My Pro Street Online.
Pro Street Installation Tip: Always verify speaker polarity and impedance before connecting an aftermarket amplifier. Factory wiring diagrams help identify audio connections, but amplifier power must be supplied through properly protected power wiring.
BOSS Audio R1004 Technical Specifications
| Specification | Details |
|---|---|
| Brand | BOSS Audio Systems |
| Model | R1004 |
| Series | Riot |
| Amplifier Type | Four-Channel |
| Amplifier Class | Class A/B |
| Maximum Advertised Power | 400W |
| Maximum Output at 2 Ohms | 100W × 4 |
| Maximum Output at 4 Ohms | 50W × 4 |
| Speaker Impedance | 2–8 Ohms |
| Frequency Response | 12 Hz–22 kHz |
| Signal-to-Noise Ratio | 90 dB |
| Listed THD | 0.01% |
| Power Supply | MOSFET |
| Fuse | 1 × 15A ATO Blade |
| Dimensions | 7.75 × 9 × 2 Inches |
| Weight | 3.09 Pounds |
| Advertised Warranty | 6 Years Parts and Labor, Subject to Terms |
Installation Tips for the BOSS Audio R1004
Before installation, verify that your speakers fall within the amplifier’s supported impedance range.
Choose a secure mounting location with adequate ventilation and sufficient clearance for wiring connections.
Use properly sized power and ground cables according to the amplifier manufacturer’s instructions.
Install suitable circuit protection close to the battery to protect the amplifier’s power cable.
Connect the amplifier to a compatible audio signal source and verify speaker polarity before powering the system.
Begin with conservative gain settings and adjust the source-unit volume to avoid audible distortion.
For smaller factory replacement speakers, use appropriate high-pass filtering through the head unit or another compatible audio processor when needed.
Do not connect a speaker load below 2 ohms per channel.
Why Choose the BOSS Audio R1004?
The BOSS Audio R1004 offers a budget-friendly introduction to four-channel aftermarket car audio amplification.
Its compact design, Class A/B circuitry, MOSFET power supply, and 2-ohm stable speaker outputs make it a practical option for modest speaker upgrades.
For drivers who want dedicated amplification without purchasing a larger, more expensive amplifier, the R1004 provides a straightforward solution.
Upgrade Your Car Audio with Pro Street Online
Get more from your aftermarket speakers with the BOSS Audio Systems R1004 Riot 400W 4-Channel Class A/B Amplifier.
Pair it with compatible front and rear speakers, quality amplifier wiring, and the appropriate stereo integration hardware for your vehicle.
Explore more car audio amplifiers, aftermarket stereos, speakers, and installation accessories at Pro Street Online.
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