Ruthless Audio 1200.4 Micro 4 Channel Amplifier
Need substantial four-channel output but have limited room to mount an amplifier? The Ruthless Audio 1200.4 Micro 4-Channel Amplifier combines a listed 1,200W total RMS rating with a 10.875" overall length. It can power a high-output speaker stage or serve a carefully matched bridged setup without the footprint of a larger amp. Measure your available space, plan the wiring, and leave room for airflow.
This Class-D amplifier is listed at 300W x 4 @ 2 ohms and 180W x 4 @ 4 ohms at 14.4V. The published signal-to-noise ratio is 95dB, and onboard high-pass (20Hz–8kHz) and low-pass (50Hz–8kHz) filters provide adjustment for different speaker arrangements. Its 120A fuse rating and 9–16V operating range make electrical planning important. Bridge the four channels into two when your speakers or subwoofers and the final impedance suit the amplifier's requirements.
The chassis measures 10.875" overall length, including a 9.9" heatsink, by 4.7" wide and 2.2" high. Those measurements make under-seat, behind-panel, and custom placement worth exploring, but a tight fit still needs adequate ventilation and safe access to the connections.
Why Choose the Ruthless Audio 1200.4 Micro Amplifier?
- 1,200W Total RMS Rating — Four channels rated at 300W each into 2Ω at 14.4V.
- Compact Micro Chassis — A 10.875" overall length offers mounting options when space is limited.
- Class-D Design — An amplifier topology suited to a compact high-output installation.
- Bridgeable Four-Channel Layout — Run four speaker channels or bridge them in pairs for a suitable two-channel load.
- Onboard High-Pass and Low-Pass Filters — Listed HPF range of 20Hz–8kHz and LPF range of 50Hz–8kHz.
- 95dB Signal-to-Noise Ratio — A published specification to consider when comparing amps.
- 120A Fuse Rating — Use the listed rating when planning wiring and protection according to the manufacturer's instructions.
- 9–16V Operating Range — Confirm your vehicle's supply remains within the stated range under load.
Amplifier & Wiring Recommendations
Consider the 1200.4 Micro for component or coaxial speakers with appropriate impedance and RMS handling in the 150–300W-per-channel range. Feed it a compatible four-channel RCA signal from your head unit or DSP. The original listing recommends a 4-gauge power and ground kit as a starting point for the 120A fuse rating; confirm the final wire size, run length, grounding, and protective fusing for your vehicle. When bridging channels 1+2 and 3+4, check the bridged power requirements and keep each load at a minimum of 4Ω.
Route RCA cables away from power wiring where practical, secure the amp, and allow approximately 1–2" of airflow clearance around the heatsink in an enclosed mount. An upstream DSP can add time alignment, EQ, and more crossover options if your system needs them. For motorcycle or powersports use, plan for weather-protected connections and check electrical capacity; compact dimensions alone do not make an amplifier weatherproof.
Full Specifications
| Specification | Value |
|---|---|
| RMS Power @ 2Ω (14.4V) | 300W x 4 |
| RMS Power @ 4Ω (14.4V) | 180W x 4 |
| Total RMS Power | 1,200W |
| Amplifier Class | Class-D |
| Channels | 4 (Bridgeable to 2) |
| Frequency Response | 20Hz – 8kHz |
| High Pass Filter | 20Hz – 8kHz |
| Low Pass Filter | 50Hz – 8kHz |
| Signal-to-Noise Ratio | 95dB |
| Fuse Rating | 120A |
| Operating Voltage | 9–16V |
| Overall Length | 10.875" |
| Heatsink Length | 9.9" |
| Width | 4.7" |
| Height | 2.2" |
| Warranty | 1 Year Standard / 2 Year Extended Available |
Frequently Asked Questions
Q: What size wiring kit do I need for the Ruthless Audio 1200.4 Micro?
A: The original listing recommends 4-gauge power and ground cable for its 120A fuse rating. Confirm the cable and fuse sizing for your run and follow the manufacturer's installation instructions.
Q: Can I bridge the 1200.4 Micro to run subwoofers?
A: The amplifier is listed as bridgeable to two channels. Use subwoofers that suit the resulting output and maintain at least a 4Ω load on each bridged pair. Verify the bridged power specification for your system design.
Q: How does the 1200.4 Micro compare to the 800.4 Micro?
A: At 2Ω and 14.4V, this model is rated at 300W x 4 versus 200W x 4 for the 800.4 Micro. It is also longer, 10.875" compared with 9.25", so weigh both the speaker power requirement and your mounting space.
Q: Is the 1200.4 Micro suitable for motorcycle or powersports installs?
A: Its dimensions may suit a space-limited build. Check charging capacity, ventilation, secure mounting, and weather protection before choosing an installation location.
