Extron NetPA U 4004 FX – Four Channel Dante Amplifier with DSP, 400W

Product Overview

The Extron NetPA U 4004 FX is a four channel Dante power amplifier built for multi-zone commercial AV systems that need networked audio transport, onboard signal processing, and high output in a single rack space. Each of its four channels delivers 400 watts and can be independently set to drive 8 ohm, 4 ohm, 70V, or 100V loads, so one chassis can feed a distributed ceiling speaker zone and a low impedance subwoofer at the same time. Audio arrives over the Dante network or through balanced analog line inputs, and an integrated 12x16 mix matrix handles gain, filtering, dynamics, and delay before amplification. For integrators standardizing on networked audio, this Dante enabled amplifier consolidates DSP, routing, and amplification into one 1U device with AES67 interoperability.

Product Description

Commercial AV system designers deploying a four channel Dante amplifier usually face a tradeoff between channel count, load type, and rack depth. The NetPA U 4004 FX removes that tradeoff by making output mode and power allocation software configurable per channel. Total power within each adjacent channel pair is shared, so a single channel can be driven to 800 watts when the paired channel needs less, matching the amplifier to actual zone loading rather than a fixed nameplate rating. A software configurable high pass filter, defaulted to 80 Hz with a 12 dB per octave rolloff, protects speaker transformer cores in 70V and 100V constant voltage modes.

The onboard 12x16 mix matrix routes any analog or Dante input to any amplifier output, Dante output, or analog line output, with the post-DSP line outputs processed separately from the amplifier outputs so downstream amplifiers can receive their own delay and level settings. Dante transport runs 8 channels in and 8 channels out at 24-bit/48 kHz with Dante Domain Manager and AES67 support, and the two Gigabit LAN ports can be merged for single cable operation or split to keep control traffic off the audio VLAN. PoE on the LAN/AT 1 port keeps DSP, Dante routing, and analog line I/O alive if mains power is lost, and lets the unit be configured on the bench before installation.

Installation-side details matter in dense equipment racks, and this network power amplifier is built for them. Front-to-rear variable speed fan cooling means no empty rack units are required above or below the chassis, and front plus rear rack mounting hardware ships in the box for racks from 15.48 to 26.13 inches deep. Power factor correction and ultra low inrush current allow multiple NetPA Ultra FX units to be energized simultaneously without a power sequencer. InstaWake auto-standby drops the amplifier to standby after 25 minutes of inactivity and returns it to full power in under 50 milliseconds on signal detection, fast enough that program audio is not clipped at the head. Control integration is handled over IP or RS-232 with Extron SIS commands, two digital input ports, two digital output ports, and an internal web interface for logging and hardware configuration.

If your deployment does not require networked audio, the Extron XPA U 4004 FX offers the same four channel configurable output architecture with analog inputs only. For lower power zones, the NetPA U 2004 FX provides an identical feature set at 200 watts per channel. Browse matched processors, amplifiers, and speakers in the Extron collection.

Key Features

• Four 400 watt configurable channels — Each channel independently drives 8 ohm, 4 ohm, 70V, or 100V loads, allowing one amplifier to serve mixed low and high impedance zones in the same system.
• Software configurable power allocation — 800 total watts per channel pair can be balanced between adjacent channels, delivering up to 800 watts to a single channel where a zone demands it.
• Dante and AES67 audio networking — 8 channels of Dante receive and 8 channels of transmit at 24-bit/48 kHz, with Dante Domain Manager support for enterprise network deployments.
• Onboard DSP with 12x16 mix matrix — Route any analog or Dante input to any amplifier, Dante, or line output with gain, filters, dynamics, and delay applied per path.
• InstaWake auto-standby — The amplifier enters standby after 25 minutes of inactivity and returns to full output in under 50 milliseconds on signal detection, with minimal inrush current.
• Configurable dual LAN ports — Dante and control traffic can share a single port for one-cable installs or be separated across two ports on a converged network.
• PoE powered DSP and routing — With PoE applied to the LAN/AT 1 port, DSP, Dante routing, and analog line I/O continue operating during a mains power loss, and the unit can be configured on PoE alone before installation.
• Configurable high pass filter for constant voltage modes — Frequency and slope are adjustable to prevent saturation of 70V and 100V speaker transformer cores.
• Analog line inputs and post-DSP line outputs — Four balanced line inputs accept legacy analog sources, and four processed line outputs feed additional amplifiers with independent delay and level.
• 1U full rack width chassis with no ventilation spacing — Front-to-rear variable speed fan cooling eliminates the need for empty rack units, and front and rear rack brackets are included.
• Power factor correction and low inrush current — Multiple units can be powered on simultaneously without a sequencer, and harmonic content is kept off the AC line.
• Extron Everlast internal power supply — Worldwide 100 to 240 VAC compatibility backed by a 7-year parts and labor power supply warranty in addition to the 3-year product warranty.

Typical Applications

• Auditorium — Drives 70V or 100V distributed delay zones and low impedance front-of-house speakers from one chassis using per-channel output modes.
• All-hands room — Software configurable power allocation supports large-capacity spaces where zone loading varies across the room.
• Multi-purpose room — Suits combinable spaces where zone requirements change with the partition configuration.
• House of worship — Handles main worship space, overflow, and cry room zones over a single Dante network drop with independent processing per zone.
• Government space — Dual LAN ports allow Dante audio and control traffic to be segregated onto separate networks to satisfy IT security policy in council chambers and civic facilities.
• Training room — Onboard DSP replaces a separate zone processor for program audio and reinforcement in rooms that do not warrant a full matrix DSP.
• Conference room and boardroom — Pairs with a Dante-enabled matrix processor to deliver ceiling speaker reinforcement and a subwoofer channel from one rack unit.
• Broadcast studio — AES67 interoperability and deterministic 1.0 ms Dante latency support studio monitoring and paging feeds alongside third-party network audio devices.
• Commercial meeting space — Four constant voltage zones per chassis suit floor-by-floor distributed audio with centralized rack placement.

Technical Specifications

All values below are published by Extron for the NetPA U 4004 FX, part number 60-2035-01. Specifications are subject to change without notice.

Power Consumption and Thermal Dissipation

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Frequently Asked Questions

Can each channel be set to a different output mode?

Yes. Output mode is selectable per channel. Any of the four channels can be independently configured for 8 ohm, 4 ohm, 70V, or 100V operation, which allows a single NetPA U 4004 FX to feed a constant voltage ceiling speaker zone and a low impedance subwoofer from the same chassis.

How does power sharing between channel pairs work in a system design?

Total power is shared within each adjacent channel pair, with 800 watts available per pair. If one zone in a pair requires more headroom than the other, the amplifier can be configured to deliver up to 800 watts to that single channel. Size zone loading against the pair budget rather than treating all four channels as fixed 400 watt outputs.

What is required to get audio onto the amplifier over Dante?

A Dante-enabled source device and Dante Controller software to make the subscriptions. The NetPA U 4004 FX receives 8 Dante channels and transmits 8, and supports Dante Domain Manager and AES67 for interoperability with third-party network audio devices. In an Extron-based system it pairs directly with a Dante-equipped matrix processor such as the DMP 128 Plus AT or the DMP 64 Plus C AT.

How should the two LAN ports be configured on a corporate network?

The dual Gigabit ports are configurable. They can be merged so Dante audio and control traffic share a single cable drop, or split so Dante audio sits on a dedicated audio VLAN while control traffic reaches the AV control system on a separate network. The unit supports IEEE 802.1X, HTTPS, SSH, and SFTP, which typically satisfies IT security requirements for a device placed on an enterprise LAN.

Does this amplifier need empty rack units above it for ventilation?

No. The chassis uses front-to-rear variable speed fan cooling rather than convection, so no ventilation spacing is required and units can be stacked contiguously. The 1U full rack width enclosure includes both front and rear rack mounting brackets, and the rear ears accommodate rack depths from 15.48 to 26.13 inches. Washable, replaceable foam air filters are used, with replacements available as the Extron AFK 100 10-pack.

Do multiple units require a power sequencer?

No. The NetPA Ultra FX design uses ultra low inrush current at power up and includes power factor correction, so multiple amplifiers can be energized simultaneously without overloading the branch circuit or introducing harmonic content onto the AC line. This removes a sequencer from the rack bill of materials on multi-amplifier installations.

How is the amplifier controlled and monitored from an AV control system?

Control and status monitoring are available over IP or RS-232 using Extron Simple Instruction Set commands. Two digital input ports and two digital output ports allow the amplifier to respond to external triggers such as preset recall, and an internal web interface exposes hardware configuration plus plain-language CSV event logs for remote diagnostics. Configuration is performed in Extron DSP Configurator Pro.

What warranty and support coverage applies?

Extron covers the NetPA U 4004 FX with a 3 year parts and labor warranty, and the internal Extron Everlast power supply carries a separate 7 year parts and labor warranty. Creation Networks supports commercial AV integrators and procurement teams on specification, lead time, and volume pricing; contact us before finalizing amplifier count on a multi-zone design.

Related Products

• Extron XPA U 4004 FX — Same four channel configurable output architecture without Dante networking.
• Extron NetPA U 2004 FX — Four channel Dante amplifier with DSP at 200 watts per channel.
• Extron DMP 128 Plus C AT — 12x8 ProDSP matrix processor with AEC and Dante for conference room systems.
• Extron SF 26CT Ceiling Speakers — 6.5" two-way 70/100V ceiling speakers for distributed zones.
• Extron SF 26PT Pendant Speakers — 6.5" two-way pendant speakers for open ceiling installations.
• Extron Collection — Full range of Extron amplifiers, processors, and speakers at Creation Networks.