Description
Description
The ARC Audio X2 450.4 is a compact four-channel Class-D amplifier designed to provide efficient full-range power in automotive and powersports systems. Its microprocessor-controlled architecture, high-frequency switching power supply, and balanced input stage are intended to maintain clean signal delivery while fitting into limited installation space.
The amplifier produces 85 watts per channel into 4 ohms or 125 watts per channel into 2 ohms. It can also be bridged to deliver 250 watts to each of two 4-ohm loads. Front and rear crossover sections, variable bass boost, speaker-level-compatible RCA inputs, and automatic turn-on functions allow it to work with aftermarket radios or many factory-audio sources.
The X2 450.4 uses an extruded aluminum heatsink, audiophile Class-D output filter networks, high-capacity low-ESR power-supply storage, nickel-plated RCA connections, quick-disconnect speaker terminals, and stored fault-code protection. Its single-side connection layout and rotatable logo support horizontal or vertical mounting.
Specifications
| Amplifier Class | Class D |
|---|---|
| Channels | 4 |
| Power Output at 4 Ohms | 85 watts x 4 |
| Power Output at 2 Ohms | 125 watts x 4 |
| Bridged Power at 4 Ohms | 250 watts x 2 |
| 2-Ohm Bridged Operation | Not recommended |
| Frequency Response | 20 Hz to 20 kHz |
| Front Crossover Range | 50 Hz to 3 kHz |
| Rear High-Pass Range | 10 Hz to 1 kHz |
| Rear Low-Pass Range | 50 Hz to 3 kHz |
| Crossover Slope | 12 dB/octave |
| Bass Boost | Variable 0 to 9 dB at 45 Hz |
| Remote Level Control | Optional accessory; not included |
| Input Sensitivity | 200 mV to 3.5 V |
| Maximum Current Draw | 125 A at 1,060 W / 20% THD |
| Fuse Rating | 2 x 25 A |
| Dimensions | 8.173 x 6.268 x 2.086 inches |
| Power Supply | High-frequency switching design |
| Input Stage | Fully balanced |
| RCA Inputs | Nickel-plated; speaker-level compatible |
| Speaker Connections | Quick-disconnect terminal plugs |
| Protection | Microprocessor-controlled with stored fault codes |
| Automatic Turn-On | Signal-sense and DC-detect |
| Vehicle Compatibility | Stop/start compatible |
| Mounting Orientation | Horizontal or vertical |
Features
- Four-channel full-range Class-D amplifier
- Bridgeable channel pairs for two-channel high-power operation
- High-frequency switching power supply
- Fully balanced input stage
- Speaker-level-compatible RCA inputs
- Signal-sense and DC-detect automatic turn-on
- Front and rear crossover controls
- Variable bass boost
- Audiophile Class-D output filter networks
- Ultra-low-ESR high-capacity power-supply storage capacitors
- Microprocessor-controlled protection with stored fault codes
- Nickel-plated RCA terminals
- Quick-disconnect speaker terminal plugs
- Single-side connection layout
- Extruded aluminum heatsink chassis
- Horizontal or vertical mounting with rotatable center logo