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A4 Two-Channel Amplifier

Product discontinued

Features: -Excellent Sound Quality -2 Channel Class-D/T Amplifier -DC and short circuit protected outputs -Ultra Light-Weight and Compact Design -Self Contained module -96kHz DSP Processor Built-in -RS485 Networking - Hardware ready awaiting future software -USB PC Link for program updates -Manual memory recall -Low noise, self regulated fans


The A4 amplifier is the result of a five year collaboration between Funktion One and leading audio electronics specialists XTA to produce a sonically excellent and reliable amplifier module. It is a 2 channel Class-D/T Power Amplifier with power provided from a Switching Power Supply. It is fully self protected and fan-cooled and gives exceptional power, remarkable clarity and all from a 3.2kg package. The module also includes renowned XTA 96kHz DSP for plug and play simplicity meaning that a product like the Resolution 2A or Resolution 4EA-CP can be simply operated from a full range signal input. Furthermore, there is enough power in reserve to drive an unpowered slave enclosure.


Output Power per channel: 8Ω @ 1kHz 650W 4Ω @ 1kHz 1250W

THD at Rated Power into 4Ω 20Hz - 20kHz less than 0.03%

Input CMRR: >90dB

Hum & Noise: -105dB

Gain: 32dB

Frequency Response: 20Hz - 20kHz, +0/-0.5dB

Input Impedance (actively balanced): 20kΩ

Dimensions: 50 x 213 x 287mm

Weight: 3.2kg

Power requrement: 230VAC @ 8A MAX 115VAC @ 12A MAX

Connections: Mains Power: Neutrik Powercon

Speaker Output: NL4 (Ch1, Pins 1+ and 1-) (Ch2, Pins 2+ and 2-)

Data Signal: 3-Pin XLR (RS485)

USB (Type B)

Technical Drawings:

A4 Two-Channel Amplifier Technical Drawing
All dimensions in mm and inches © Copyright Funktion One Research Ltd 2008 - 2024

Downloadable Files:


Product in Action: