Ruthless Audio
Ruthless Audio 800.4 Micro
Ruthless Audio 800.4 Micro
MICRO 4-CHANNEL • RATED AT 14.4V
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The Ruthless Audio 800.4 Micro is the sweet spot between stealth and strength. It delivers 800 watts of total RMS power from a chassis only 9.25 inches long, giving you enough output for serious component speakers and pro-audio mids without giving up the install flexibility that makes the Micro line so useful.
WHY CHOOSE THE RUTHLESS AUDIO 800.4 MICRO?
- 200W × 4 @ 2Ω (14.4V) — strong output for demanding component sets and pro-audio drivers.
- 120W × 4 @ 4Ω — clean full-range power for daily-driver systems.
- 1-Year 2Ω Warranty Coverage — standard manufacturer defect coverage includes operation down to 2 ohms per channel when warranty conditions are met.
- Ultra-Compact 9.25 in. Chassis — fits under seats, behind panels, and in tight custom installs.
- High-Efficiency Class-D Design — keeps power density high while controlling heat.
- Bridgeable 4-Channel Layout — channels can be paired for higher-output 2-channel applications when wired to the correct bridged load.
- Onboard HPF & LPF — wide filter ranges give you useful crossover control without requiring a separate processor for basic system setup.
- 95dB Signal-to-Noise Ratio — designed for clean full-range reproduction at high output.
FULL SPECIFICATIONS
| RMS Power @ 2Ω (14.4V) | 200W × 4 |
| RMS Power @ 4Ω (14.4V) | 120W × 4 |
| Total RMS Power | 800W |
| Standard Warranty Load | Down to 2Ω per channel when warranty conditions are met |
| 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 | 80A |
| Operating Voltage | 9–16V |
| Overall Length | 9.25 in. |
| Heatsink Length | 8.25 in. |
| Width | 4.7 in. |
| Height | 2.2 in. |
AMPLIFIER & WIRING RECOMMENDATIONS
Use quality OFC power and ground wiring with proper fusing and a short, low-resistance ground. A correctly installed 4 AWG kit is a strong choice for many 800.4 Micro installations. Keep RCA and signal wiring separated from high-current power runs.
For bridged operation, use a minimum 4-ohm bridged load. Standard warranty coverage is down to 2 ohms per channel in stereo operation when all warranty requirements are met.
Give the heatsink room to breathe in enclosed installations. Operation below 11V, excessive clipping, and wiring below the covered impedance are not covered under warranty.
FREQUENTLY ASKED QUESTIONS
Is the 800.4 Micro warrantied at 2 ohms per channel?
Yes. The standard 1-year manufacturer defect warranty covers operation down to 2 ohms per channel when Ruthless warranty requirements are met.
Can I bridge the 800.4 Micro?
Yes. Channels can be bridged in pairs for a 2-channel configuration. Keep the bridged load at 4 ohms or higher.
How is it different from the full-size 800.4?
The Micro version is built around packaging efficiency: a much smaller chassis with 200W × 4 at 2 ohms. The full-size 800.4 produces 220W × 4 and adds the larger Korean platform, Tiffany-style RCA inputs, clip-light function, and wider x10 crossover controls.
Is it good for a stealth install?
Yes. At only 9.25 inches long and 2.2 inches tall, it can fit in locations where a traditional full-size amplifier cannot.
What can void warranty coverage?
Warranty does not cover vibration damage, wire or debris inside the amplifier, wiring below the covered impedance, external RCA damage, excessive clipping, or operation below 11V. Full warranty terms apply.
EXTENDED WARRANTY
No – Standard Warranty (1 Year)
Includes the standard 1-year manufacturer defect warranty, including covered operation down to 2 ohms per channel when all warranty requirements are met.
Yes – Extended Warranty (2 Years Total)
Adds 1 additional year of manufacturer defect warranty coverage for 2 years total.
THE MICRO SWEET SPOT.
BIG FRONT-STAGE POWER. SMALL INSTALL.
The Ruthless 800.4 Micro is built for systems that need more than a basic four-channel without giving up install space. It is rated at 200 watts RMS × 4 at 2 ohms and 120 watts RMS × 4 at 4 ohms at 14.4 volts.
Ruthless uses a compact Class-D platform with 20Hz–8kHz response, a 20Hz–8kHz high-pass filter, a 50Hz–8kHz low-pass filter, 9–16V operating range and an 80-amp fuse rating. It can run a full four-channel stage or be bridged where the system calls for more power per load.
WHY THIS AMP?
THE REASON IT EXISTS.
Enough output for serious component speakers and pro-audio front stages.
Useful real-world output for conventional four-ohm speaker systems.
A published 9–16V operating range gives the installer a clear voltage window.
Overall dimensions are 9.25 × 4.7 × 2.2 inches for space-limited installs.
VERIFIED SPECIFICATIONS
THE NUMBERS.
80A FUSE. CLEAN POWER PATH.
STEALTH INSTALLS STILL NEED GOOD WIRING.
The 800.4 Micro carries an 80-amp fuse rating and a 9–16V operating range. Use properly sized power and ground wiring, short low-resistance grounds and secure connections so the compact chassis gets the voltage it needs.
A clean install matters as much as the amplifier. Poor grounds and undersized wire can erase the advantage of a high-efficiency Class-D design.
SHOP POWER + GROUND →WARRANTY OPTIONS
STANDARD OR EXTENDED.
The standard product option includes a 1-year manufacturer defect warranty. Where offered on the product, the extended-warranty option adds one additional year for 2 years total coverage. Any special low-impedance warranty requirement shown above still depends on the installation meeting Ruthless requirements.
FINISH THE SYSTEM
MATCH THE REST OF THE BUILD.
Choose the speaker or subwoofer load, electrical support, wire size, fuse protection and signal chain before the install starts. The amplifier performs best when the entire system is designed as one package.