XPA U 4004 FX – Four Channel Configurable Output Audio Power Amplifier
Four Channel Configurable Output Audio Power Amplifier – 400 Watts Per Channel
Key Features
- Four 400 watt channels into 8 ohms, 4 ohms, 70V, or 100V
- Configurable output mode per channel
- Flexible power allocation to match system requirements
- InstaWake+™ exits auto-standby mode in under 5 milliseconds
- ECO Standby delivers power only when needed, maximizing energy savings
- ENERGY STAR® qualified amplifier
| Feature | Specification |
|---|---|
| Channels & Power | 4 × 400 W RMS (all driven); up to 800 W per channel (bridged pair) |
| Output Modes | Independent per channel: 4 Ω/8 Ω/70 V/100 V with selectable HPF |
| Power Sharing | Adjacent channel pair shares up to 800 W dynamically |
| Standby Efficiency | ECO Standby <1 W, InstaWake+ <5 ms wake-up time |
| Audio Performance | THD ≤0.1 %, SNR ~100 dB, CMRR ~75 dB |
| Cooling & Form Factor | 1U full rack, rack-stackable, fan-cooled, washable filters |
| Controls & Protection | Rear rotary switches, LEDs, clip/thermal/DC protection |
| Power & Certifications | Internal PSU, power factor correction, ENERGY STAR®, CE, UL |
| Size & Weight | ~44 × 440 × 419 mm; 6.4 kg |
| Warranty | 3 years amp / 7 years PSU |
The Extron XPA U 4004 FX is a professional-grade, ENERGY STAR® certified four‑channel power amplifier, delivering 400 W RMS per channel into 8 Ω, 4 Ω, 70 V, or 100 V loads. Each channel’s output mode is independently selectable via rear rotary switches, enabling flexible multi-zone or hybrid system configurations where low‑impedance and distributed‑line speakers coexist.
Advanced ECO Standby technology works in tandem with InstaWake+™, allowing the amplifier to automatically enter low-power standby when idle (≤ 1 W), yet resume full operation in under 5 milliseconds when a signal is detected—ensuring announcements or music start cleanly with no clipping.
The amp uses pair-based flexible power sharing: each adjacent channel pair can combine output (up to 800 W on one channel) depending on system demand, for optimal power allocation.
The unit is rack-mountable (1U full rack width) and features front-to-rear cooling with long‑life variable-speed fans, plus washable filters—allowing stack installation without empty space.