Ruthless Audio 1200.4 Micro 4 Channel Amplifier
Description
Description
The Ruthless Audio 1200.4 Micro 4-Channel Amplifier is the flagship of the Ruthless Audio Micro series — a true stealth powerhouse that packs an incredible 1,200 watts of total RMS power into a chassis measuring just 10.875" in overall length. Built for serious audio warriors who refuse to compromise on output or install flexibility, the 1200.4 Micro delivers maximum performance from the smallest possible footprint. Whether you're building a high-output daily driver, a custom stealth install, or a powersports audio system that demands serious authority, the 1200.4 Micro stands alone at the top of the compact 4-channel amp category.
The 1200.4 Micro runs a high-fidelity Class-D topology rated at 300W x 4 @ 2 ohms and 180W x 4 @ 4 ohms at 14.4V — real, rated power with ultra-low distortion across both impedance loads. A signal-to-noise ratio of 95dB keeps your music clean and distortion-free at any volume, while onboard high-pass (20Hz–8kHz) and low-pass (50Hz–8kHz) filters give you precise crossover control without external processors. A 120A fuse rating and 9–16V operating voltage range ensure reliable, stable performance across a wide range of vehicle electrical systems. Bridge channels in pairs for a 2-channel configuration and you have a compact, high-output solution capable of driving a pair of subwoofers or high-power component midranges alongside your full speaker stage.
At just 10.875" overall length (9.9" heatsink), 4.7" wide, and 2.2" tall, the 1200.4 Micro fits under seats, behind panels, and inside custom enclosures where full-size amps simply won't go. It's the amp that proves you don't have to choose between power and packaging — small footprint, ruthless performance.
Why Choose the Ruthless Audio 1200.4 Micro Amplifier?
- 1,200W Total RMS Power — 300W x 4 @ 2Ω delivers flagship-level 4-channel output in a micro chassis — the most powerful amp in the Ruthless Audio Micro lineup.
- Ultra-Compact Micro Form Factor — 10.875" overall length fits under seats, behind panels, and in space-limited custom builds where traditional amps won't fit.
- High-Fidelity Class-D Design — Premium Class-D circuitry delivers ultra-low distortion and high-efficiency power transfer while keeping operating temperatures in check under sustained load.
- Bridgeable 4-Channel Configuration — Bridge channels in pairs for a 2-channel setup with higher per-channel output — ideal for driving subwoofers or high-power component midranges.
- Onboard High & Low Pass Filters — 20Hz–8kHz HPF and 50Hz–8kHz LPF let you dial in crossover points without additional signal processors or active crossovers.
- 95dB Signal-to-Noise Ratio — Exceptionally quiet background noise floor for crystal-clear audio reproduction at any volume level.
- 120A Fuse Rating — Heavy-duty fusing supports the 1200.4's elevated current demands and protects your vehicle's electrical system under sustained high-output operation.
- Wide Operating Voltage Range — 9–16V compatibility handles everything from stock alternators to high-output charging systems without issue.
Amplifier & Wiring Recommendations
The Ruthless Audio 1200.4 Micro is an ideal match for high-end component speakers or coaxial drivers rated in the 150–300W RMS range per channel. Pair it with a quality 4-channel RCA signal from your head unit or DSP processor for best results. For wiring, a 4-gauge power and ground kit is the minimum recommendation to support the 120A fuse rating and ensure clean, stable power delivery. If bridging to 2 channels, verify your speakers or subwoofer can handle the increased output and are rated for a minimum 4-ohm bridged load.
Keep power and ground runs as short as possible, and route RCA cables away from power wiring to eliminate noise. At just 2.2" tall, the 1200.4 Micro is an excellent choice for under-seat installs — ensure at least 1–2" of airflow clearance around the heatsink for optimal thermal management in enclosed spaces. For maximum tuning precision, pair the 1200.4 Micro with a DSP processor upstream to handle time alignment, EQ, and crossover duties before the signal reaches the amp.
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: A 4-gauge power and ground wiring kit is recommended as the minimum to support the 120A fuse rating and deliver clean, stable power to the amplifier.
Q: Can I bridge the 1200.4 Micro to run subwoofers?
A: Yes — bridge channels 1+2 and 3+4 for a 2-channel configuration with higher per-channel output. Ensure your subwoofers are rated for the bridged impedance load (minimum 4Ω bridged) before wiring.
Q: How does the 1200.4 Micro compare to the 800.4 Micro?
A: The 1200.4 Micro is the flagship of the Ruthless Audio Micro lineup, delivering 300W x 4 @ 2Ω vs. the 800.4 Micro's 200W x 4 — 50% more power per channel in the same ultra-compact form factor. Choose the 1200.4 when you need maximum headroom for demanding component speakers or pro-audio drivers.
Q: Is the 1200.4 Micro suitable for motorcycle or powersports installs?
A: Yes — the compact 10.875" footprint and wide 9–16V operating voltage range make the 1200.4 Micro a strong choice for motorcycle, ATV, UTV, and marine audio builds where space is limited but output demands are at their highest.
