QXD-5K

4 x 750W DSP Enabled Power Amplifier

The QXD5K is a high-powered 2RU, 4 x 750W Class-D amplifier engineered for performance-critical installations. Delivering up to 2500W per channel in bridged mode and supporting 70V/100V operation, it is built on UMAC™ Class-D architecture for exceptional dynamic range, ultra-low distortion, and high-efficiency power delivery. With integrated 32bit/96kHz DSP, the QXD-5K provides precise signal management via FIR and IIR filters, peak and RMS limiters, and onboard Quest speaker presets. Front-panel control is available via a high-resolution TFT display and LED-illuminated encoder, while network control and GPIO are accessible via RJ45. The amplifier features Neutrik speakON® outputs and powerCON® mains connection for professional-grade reliability. Optional Dante™/AES67 expansion adds network audio capability for flexible system integration in complex AV environments.

Key Specifications:

Channels: 4 x 750W (Low-Z), 2 x 2500W (Bridged), 2 x 1500W (70V/100V)
DSP: 32bit/96kHz FIR/IIR Filters, Limiters, Speaker Libraries
Mounting: 2RU Rack
Control: RJ45 & GPIO, Front TFT Display
Options: Dante™/AES67 Expansion Card

SPECIFICATIONS

POWER

NORMAL OPERATION (PEAK)					Bridged-Mono Mode (Peak)
Load	Total Power	8 Ω	4 Ω	70V	100V	8 Ω	4 Ω	70V	100V
Maximum Dynamic Power (@1kHz, 1% THD)	5000 W	4 x 400 W	4 x 750 W	N/A	N/A	2 x 1500 W	2 x 2500 W	2 x 1200 W	2 x 1500 W

NORMAL OPERATION (RMS)					BRIDGED-MONO MODE (RMS)
Load	Total Power	8 Ω	4 Ω	70V	100V	8 Ω	4 Ω	70V	100V
Maximum Continuous Power (@1kHz, 1% THD)	5000 W	4 x 400 W	4 x 750 W	N/A	N/A	2 x 1500 W	2 x 2500 W	2 x 1200 W	2 x 1500 W

I/O

OUTPUT CIRCUITRY	UMAC™ Class-D – full bandwidth PWM modulator with ultra-low distortion
OUTPUT CHANNELS	Four Speaker Level Output via Neutrik speakON® connectors
INPUT CHANNELS	Four Balanced Line Level Inputs via 3-pin Euroblock/Phoenix connector with 5.08 mm pitch and screw-lock
DEFAULT GAIN	25 dB
FREQUENCY RESPONSE	20 Hz - 20 kHz (±0.25 dB), 4 Hz - 40kHz (-3dB)
TOTAL HARMONIC DISTORTION	< 0.008% (1 KHz, 5 W, 8 Ω load)
DYNAMIC RANGE	> 108 dBA
MAXIMUM INPUT LEVEL	+28 dBu
INPUT IMPEDANCE	10kΩ Unbalanced, 20kΩ Balanced
LATENCY	<350 μs, flat setup

CONTROLS AND INDICATORS (FRONT)	High-Resolution TFT Display, Encoder with LED Halo
CONTROLS AND INDICATORS (REAR)	N/A
CONTROL AND MONITORING	RJ45 & GPIO
DIGITAL SIGNAL PROCESSING	32bit/96 kHz with FIR/IIR Filters, Peak and RMS Limiters, Custom Quest Speaker Libraries
PROTECTION CIRCUITS	Thermal Protection, Over-Current Protection, DC Protection, HF Protection

MAINS POWER INPUT	Universal Mains, 100-240VAC, 50-60 Hz
MAINS CONNECTOR	Neutrik powerCON®
POWER CONSUMPTION - STANDBY	<0.5W
POWER CONSUMPTION - IDLE	28 W
POWER CONSUMPTION - 1/8TH POWER / 8 Ω Load	260 W
POWER CONSUMPTION - 1/3RD POWER / 8 Ω Load	650 W

HEAT GENERATED - STANDBY	1.7 BTU/hr / 1.7 kJ per hour
HEAT GENERATED - 1/8TH POWER / 8 Ω Load	205 BTU/hr / 214 kJ per hour
COOLING	Fan-Forced Air Cooling – Temperature-Dependent
FAN NOISE	36 dB(A) (Anechoic Chamber, @ 1 m)

RACK SIZE	2RU
DIMENSIONS (W x H x D)	482 x 88 x 416 mm (19" x 3.5" x 16.4")
WEIGHT	10.2 kg (22.5 lbs)
SHIPPING DIMENSIONS (W x H x D)	610 x 135 x 550 mm (24" x 5.3" x 21.6")
SHIPPING WEIGHT	12 kg (26.5 lbs)

ACCESSORIES (INCLUDED)	Mains Cable, User Manual, Euroblock/Phoenix Plugs, Wi-Fi Antenna
ACCESSORIES (AVAILABLE SEPARATELY)	Rear Rack Ears
OPTIONS	Dante® Expansion Card (additional 4 inputs, Dante® AoIP, AES67 compatible)