Description
The ARC Audio X2 2500.1 is a high-output monoblock Class-D amplifier developed specifically for subwoofer systems. It delivers 900 watts RMS into 4 ohms, 1,500 watts RMS into 2 ohms, and 2,500 watts RMS into 1 ohm, making it suitable for high-power single- or multi-subwoofer installations.
The amplifier uses a high-frequency switching power supply, balanced differential input stage, and dedicated low-frequency signal path to maintain stable output and low noise at high power. Its adjustable low-pass crossover, variable-frequency bass boost, and included remote level control provide the tuning functions required for sealed, ported, and custom subwoofer systems.
The Stage 2 chassis combines an extruded aluminum body with a brushed hairline finish and illuminated rotatable badge. Single-side connections, quick-disconnect speaker terminals, automatic signal and DC-detect turn-on, and stored protection fault codes support clean installation and easier system diagnostics.
Specifications
| Amplifier class | Mono Class D |
|---|---|
| Channels | 1 |
| Rated power at 4 ohms | 900 watts RMS × 1 |
| Rated power at 2 ohms | 1,500 watts RMS × 1 |
| Rated power at 1 ohm | 2,500 watts RMS × 1 |
| Frequency response | 10 Hz–230 Hz |
| Low-pass crossover | 30 Hz–230 Hz at 24 dB/octave |
| Bass boost | 0–12 dB, adjustable from 30–125 Hz |
| Remote level control | Included |
| Input sensitivity | 200 mV–3.5 V |
| Input stage | Balanced differential |
| Automatic turn-on | Signal detect, DC detect, or remote turn-on |
| Fusing | 6 × 40-amp |
| Dimensions | 21.26 × 6.30 × 2.17 inches |
| Start/stop compatibility | Yes |
| Cosmetic package | Stage 2 brushed aluminum hairline chassis with an illuminated badge |
Features
- High-output 1-ohm-stable monoblock Class-D design.
- Dedicated frequency-limited subwoofer amplifier architecture.
- High-frequency switching power supply.
- Audiophile Class-D output filter networks.
- Balanced differential input stage.
- Speaker-level input compatibility through the RCA inputs.
- Adjustable low-pass crossover.
- Variable-frequency bass boost.
- Remote bass level control included.
- Signal-sensing and DC-detect automatic turn-on.
- Microprocessor-controlled protection and stored fault-code reporting.
- Ultra-low-ESR high-capacity power-supply capacitors.
- Single-side connection layout.
- Quick-disconnect speaker terminal plugs.
- Flexible horizontal or vertical mounting orientation.
- Brushed aluminum chassis with an illuminated rotatable badge.
How SMS Uses the X2 2500.1
The X2 2500.1 is selected around the subwoofer system, enclosure, final impedance, electrical support, and output target. SMS does not choose a 2,500-watt amplifier simply because a customer wants “more bass”; the subwoofer thermal capability, excursion, enclosure loading, charging system, wiring, and tuning all have to support the power.
Best System Fits
- High-output single- or multi-subwoofer systems wired to an appropriate final load.
- Sealed or ported systems where the enclosure is designed for the selected subwoofers and vehicle.
- ARC Audio systems using X2, ARC, A-Series, or other compatible subwoofer platforms when power and impedance match.
- Systems where the cabin DSP amplifier or stand-alone processor provides the subwoofer signal, crossover, delay, polarity, phase, and level control.
Common Pairings
The X2 2500.1 works well as the dedicated bass amplifier behind an X2 800.8 DSP, Blackbird, Falcon, or stand-alone ARC DSP system. The processor handles cabin integration and subwoofer alignment while the X2 2500.1 supplies the required low-frequency power.
Electrical and Enclosure Requirements
At this output level, power cable size, fuse protection, ground path, battery reserve, alternator capability, voltage behavior, amplifier ventilation, enclosure design, and final impedance are part of the amplifier decision. SMS verifies these items before recommending the X2 2500.1 and sets the final gain and filtering around the actual system.
Read the ARC Audio Subwoofer Guide | ARC Amplifier Guide | Electrical Upgrades | Plan an ARC Bass System