Ruthless Audio
Ruthless Audio 1500.1 Micro
Ruthless Audio 1500.1 Micro
MICRO MONOBLOCK • RATED AT 14.4V
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Don’t let the size fool you — the Ruthless Audio 1500.1 Micro is a full-blown bass amp packed into a chassis barely over a foot long. It delivers a true 1,500W RMS at 1 ohm with exceptional efficiency, making it a strong choice for tight installs, stealth builds, and daily systems that need serious subwoofer authority without a full-size amplifier footprint.
WHY CHOOSE THE RUTHLESS AUDIO 1500.1 MICRO?
- 1,500W RMS @ 1Ω (14.4V) — serious monoblock power from an ultra-compact chassis.
- 84% / 89% / 93% Efficiency — published efficiency at 1, 2, and 4 ohms helps reduce wasted energy and heat.
- 1-Year 1Ω Warranty Coverage — standard manufacturer defect coverage includes operation down to 1 ohm when warranty conditions are met.
- 12-13/16 in. Overall Length — fits in spaces where a traditional full-size monoblock simply will not.
- High-Speed Class-D Architecture — compact, efficient power delivery with strong transient control.
- 10Hz–250Hz Frequency Response — deep low-frequency extension for subwoofer duty.
- 0–180° Phase Control — helps integrate the subwoofer system with the rest of the vehicle’s audio stage.
- 4 AWG Power Inputs / 150A Fuse — straightforward current requirements for a compact 1,500-watt build.
FULL SPECIFICATIONS
| RMS Power @ 1Ω (14.4V) | 1,500W @ 84% efficiency |
| RMS Power @ 2Ω (14.4V) | 1,050W @ 89% efficiency |
| RMS Power @ 4Ω (14.4V) | 600W @ 93% efficiency |
| Standard Warranty Load | Down to 1Ω when warranty conditions are met |
| Amplifier Class | Class-D |
| Channels | 1 (Monoblock) |
| Input Sensitivity | 0.2V–6V |
| Frequency Response | 10Hz–250Hz |
| Phase Control | 0–180° |
| THD | <0.01% @ 4Ω |
| Power Inputs | 4 AWG |
| Fuse Rating | 150A |
| Overall Length | 12-13/16 in. |
| Heatsink Length | 11-13/16 in. |
| Width | 4-11/16 in. |
| Height | 2-1/4 in. |
SUBWOOFER & ELECTRICAL RECOMMENDATIONS
Use quality 4 AWG OFC power and ground wiring, a properly sized inline fuse, and a short low-resistance ground. The 150A fuse rating means the electrical system still needs to be healthy even though the amplifier itself is compact.
For full-output 1-ohm use, make sure the vehicle’s charging and battery capacity can keep voltage stable. Operation below 11V is not covered under warranty. Calculate the final impedance of the complete subwoofer/voice-coil network before connecting the amplifier.
Give the heatsink airflow. The Micro chassis saves space, but it still needs ventilation when used hard for long periods.
FREQUENTLY ASKED QUESTIONS
Is the 1500.1 Micro warrantied at 1 ohm?
Yes. The standard 1-year manufacturer defect warranty covers operation down to 1 ohm when all Ruthless warranty requirements are met.
How small is it?
The amplifier measures 12-13/16 inches overall, 4-11/16 inches wide, and 2-1/4 inches tall — small enough for many under-seat, behind-panel, and stealth installations.
Do I need upgraded electrical?
That depends on the vehicle and how hard the system is used, but a healthy charging system, strong grounds, quality 4 AWG OFC wiring, and stable voltage are required. At full 1-ohm output, additional electrical reserve may be necessary.
Why are the efficiency numbers important?
Higher efficiency means a larger percentage of the electrical power drawn from the vehicle becomes amplifier output instead of heat. That helps a compact amplifier deliver serious power without requiring an oversized chassis.
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 1 ohm 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.
SMALL FOOTPRINT. REAL SUBWOOFER POWER.
1,500 WATTS IN 12.8 INCHES.
The Ruthless 1500.1 Micro is built for tight installs and stealth systems that still need real monoblock output. It delivers 1,500 watts RMS at 1 ohm, 1,050 watts at 2 ohms and 600 watts at 4 ohms at 14.4 volts in a chassis only 12-13/16 inches long overall.
Ruthless lists efficiency at 84% at 1 ohm, 89% at 2 ohms and 93% at 4 ohms. The amp uses 4-gauge power inputs, a 150-amp fuse, 0.2–6V input sensitivity, 10–250Hz response and 0–180° phase control, with a 1-ohm / 1-year warranty.
WHY THIS AMP?
THE REASON IT EXISTS.
Full-size bass output in a chassis designed to disappear into space-limited installs.
Ruthless publishes efficiency figures at 1, 2 and 4 ohms, helping explain how the Micro keeps heat and current demand under control.
4-gauge power inputs and a 150-amp fuse keep the current path appropriately sized for the platform.
12.8125 inches overall, 4.6875 inches wide and 2.25 inches tall.
VERIFIED SPECIFICATIONS
THE NUMBERS.
MICRO DOESN’T MEAN ZERO CURRENT.
GIVE IT CLEAN, STABLE VOLTAGE.
The 1500.1 Micro still needs a healthy charging system, proper 4-gauge power and ground wiring, a 150-amp fuse and solid grounds to deliver rated output. Running it at 1 ohm puts more demand on the electrical than the chassis size suggests.
The published efficiency is strong, but voltage drop still costs output. Keep the power path short, clean and properly protected.
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.