QX300D

High Performance 2 x 150W Power Amplifier with Dante/AES67

The QX300D is a high performance 2 x 150W power amplifier incorporating Dante™/AES67 network audio connectivity to enable seamless integration into modern AV networks. Retaining the high-performance features of its analogue counterpart—including advanced auto load sensing, efficient UMAC™ Class-D circuitry, and a compact form factor—this model meets stringent Energy Star and ErP standards with minimal standby power consumption. Ideal for installations requiring both top-tier performance and network audio interoperability.

Key Specifications:

Channels: 2 x 150W (Low-Z) or 1 x 300W (Bridge Mono for Low-Z & 70/100V)
Features: Auto Load Sensing, Dante/AES67 connectivity
Rack Density: 10 units per 3RU

SPECIFICATIONS

POWER

NORMAL OPERATION (PEAK)
Load	Total Power	8 Ω	4 Ω	70V	100V	8 Ω	4 Ω	70V	100V
Maximum Dynamic Power (@ 1khz, 1% THD)	550 W	2 x 200 W	2 x 275 W	N/A	N/A	1 x 550 W	1 x 550 W	1 x 550 W	1 x 550 W

NORMAL OPERATION (RMS)
Load	Total Power	8 Ω	4 Ω	70V	100V	8 Ω	4 Ω	70V	100V
Maximum Continuous Power (@1kHz, 1% THD)	280 W	2 x 140 W	2 x 140 W	N/A	N/A	1 x 280 W	1 x 260 W	1 x 250 W	1 x 240 W

I/O

OUTPUT CIRCUITRY	UMAC™ Class-D – full bandwidth PWM modulator with ultra-low distortion
OUTPUT CHANNELS	Four Speaker Level Output via 2-pin Euroblock/Phoenix connector with 5.08 mm pitch and screw-lock
INPUT CHANNELS	Four Analogue Balanced Line Level Inputs via 3-pin Euroblock/Phoenix connector with 5.08 mm pitch and screw-lock
DEFAULT GAIN	32 dB
FREQUENCY RESPONSE	20 Hz to 20 kHz (±0.3 dB)
TOTAL HARMONIC DISTORTION	0.006% (1 kHz @ 1/8th Power / 8 Ω load)
DYNAMIC RANGE	104 dB (A-weighted)
MAXIMUM INPUT LEVEL	'+24 dBu
INPUT IMPEDANCE	10kΩ
LATENCY	N/A

CONTROLS AND INDICATORS (FRONT)	Per Channel: Volume Potentiometer, 80 Hz HPF Switch, 100 Hz LPF Switch, Bridge-Mono Switch, Limiter Switch and Auto-Standby Switch
CONTROLS AND INDICATORS (REAR)	N/A
CONTROL AND MONITORING	N/A
DIGITAL SIGNAL PROCESSING	N/A
PROTECTION CIRCUITS	Thermal protection, Over-Current Protection, DC Protection, HF Protection

MAINS POWER INPUT	Universal Mains, 100-240V, 50-60 Hz
MAINS CONNECTOR	Standard IEC C14
POWER CONSUMPTION - STANDBY	3.8 W
POWER CONSUMPTION - IDLE	16 W
POWER CONSUMPTION - 1/8TH POWER / 8 Ω Load	75 W
POWER CONSUMPTION - 1/3RD POWER / 8 Ω Load	200 W

HEAT GENERATED - STANDBY	13 BTU/hr / 3.2 kJ per hour
HEAT GENERATED - 1/8TH POWER / 8 Ω Load	154 BTU/hr / 38 kJ per hour
COOLING	Fan-Forced Air Cooling – Temperature-Dependent
FAN NOISE (ANECHOIC CHAMBER @ 1 m)	38 dB(A)

RACK SIZE	1RU
DIMENSIONS (W x H x D)	482 x 44.5 x 344 mm (19 x 1.75 x 13.5")
WEIGHT	5.3 kg (11.7 lbs)
SHIPPING DIMENSIONS (W x H x D)	590 x 80 x 410 mm (23.2 x 3.1 x 16.2")
SHIPPING WEIGHT	7.5 kg (16.5 lbs)

ACCESSORIES (INCLUDED)	Mains Cable, Feet, User Manual, Euroblock/Phoenix Plugs
ACCESSORIES (AVAILABLE SEPARATELY)	Dante® 4CH Input Card (QDNT4D), Dante® 4CH Input Card with Switched Output (QDNT4DS), Volume Control Card (QVR4), Wall Plate Volume Control (WPV1)
OPTIONS	Dante® Expansion Card (additional 4 inputs, Dante® AoIP, AES67 compatible)