Extron XPA U 4004 FX Four Channel Configurable Output Audio Power Amplifier 400 Watts Per Channel

Product Description

The Extron XPA U 4004 FX is an ENERGY STAR qualified four-channel configurable output audio power amplifier that delivers 400 watts per channel simultaneously into 8 ohm, 4 ohm, 70 volt, and 100 volt loads. Built for demanding multi-zone commercial AV installations, this Class D amplifier lets integrators assign an independent output mode to each channel using rear-panel rotary switches, so a single 1U chassis can drive low-impedance stereo speakers and distributed 70V/100V loudspeaker lines at the same time. As a high-power four-channel configurable output audio power amplifier, the XPA U 4004 FX consolidates rack space, simplifies bills of material, and standardizes amplifier inventory across rooms.

Flexible power allocation shares the combined 800 watts of each adjacent odd/even channel pair, directing power where each zone needs it most. The fan-cooled aluminum enclosure requires no adjacent empty rack spaces, and front and rear rack-mount hardware is included for stability in deep equipment racks. ECO Standby with InstaWake+ holds the amplifier in a sub-1-watt state during inactivity and returns to full output in under 5 milliseconds, reducing operating cost without clipping the start of program audio.

Typical deployments include corporate campuses, higher education lecture halls, houses of worship, retail and hospitality background music, and stadium concourse paging where multiple 70V distributed audio zones must coexist with foreground stereo reproduction. The XPA U 4004 FX integrates cleanly with Extron audio processors, matrix switchers, and control systems as part of a complete commercial-grade signal chain. For lower-power rooms, compare the four-channel XPA U 2004 FX (200 W/ch) and the eight-channel low-impedance XPA U 758 (75 W/ch), or browse the full Extron collection.

Key Features

• Four 400-Watt Configurable Channels — Each channel delivers 400 watts into 8 ohm, 4 ohm, 70V, or 100V loads, with all channels driven simultaneously for large multi-zone integration projects.
• Independent Per-Channel Output Modes — Rear-panel rotary switches let installers set each channel for low-impedance or constant-voltage operation, so one amplifier serves rooms with mixed loudspeaker types.
• Flexible Power Allocation — The combined 800 watts of each odd/even channel pair is shared between the two channels to match the SPL requirements of adjacent zones.
• InstaWake+ with ECO Standby — The amplifier drops below 1 watt during inactivity and returns to full output in under 5 milliseconds on signal detection, maximizing energy savings without cutting off audio.
• Selectable High Pass Filter — An 80 Hz, 12 dB-per-octave high pass filter can be engaged in 70V or 100V modes to prevent saturation of speaker transformer cores.
• Professional Audio Performance — The amplifier achieves a 100 dB signal-to-noise ratio and THD+N below 0.1 percent for clean reproduction across the 20 Hz to 20 kHz band.
• Low Inrush Current Design — Minimal inrush at power-up allows multiple XPA Ultra FX units to start simultaneously without external power sequencing hardware.
• Comprehensive Protection Circuitry — Automatic clip limiting plus thermal, short-circuit, and DC-fault protection safeguard both the amplifier and connected loudspeakers.
• Single Rack Space Enclosure — The fan-cooled 1U full-rack-width chassis needs no adjacent empty rack spaces and ships with front and rear rack-mount brackets.
• Extron Everlast Power Supply — The internal Everlast supply provides worldwide power compatibility and is backed by a 7-year parts and labor warranty.

Technical Specifications

Frequently Asked Questions

Can the XPA U 4004 FX drive both 70V distributed audio and low-impedance speakers at the same time?

Yes. Each of the four channels is independently configurable for 8 ohm, 4 ohm, 70V, or 100V operation using the rear-panel rotary switches, so a single amplifier can power a low-impedance stereo pair while simultaneously driving multiple 70V or 100V distributed loudspeaker zones.

How much rack space does the amplifier require, and does it need ventilation clearance?

The XPA U 4004 FX occupies a single rack unit (1U) at full rack width. Its front-to-rear variable-speed fan cooling means no adjacent empty rack spaces are required, allowing multiple units to be stacked directly in an equipment rack.

Do I need power sequencing hardware when installing several units?

No. The amplifier draws minimal inrush current at power-up, so multiple XPA Ultra FX series amplifiers can be powered on simultaneously without overloading branch circuits and without external power sequencing.

How does this model compare to the XPA U 2004 FX?

Both are four-channel configurable output amplifiers, but the XPA U 4004 FX delivers 400 watts per channel versus 200 watts per channel on the XPA U 2004 FX. Choose the 4004 FX for larger zones, higher SPL requirements, or longer 70V/100V speaker runs.

What warranty and support are included?

The amplifier carries a 3-year parts and labor warranty, and the internal Extron Everlast power supply is covered for 7 years parts and labor. Creation Networks provides pre-sale system design guidance and post-sale support for commercial AV integrators. Explore related models in the Extron collection.