QX500D
High-Performance 2-Channel 500W Power AmplifierThe Quest QX500D is a high-performance 2 x 250W power amplifier engineered for versatile installation applications. Utilizing advanced UMAC™ Class-D technology, it offers exceptional efficiency and intelligent auto load sensing for both Low-Z and High-Z configurations. Its compact design supports wall or table mounting and high-density installation with up to 10 units per 3RU rack space. Robust construction—including a diecast base and comprehensive protection circuits—ensures reliable operation in demanding environments, making the QX500 a dependable solution for professional audio systems.
Key Specifications:
- Channels: 2 x 250W (Low-Z) or 1 x 500W (Bridge Mono for Low-Z & 70/100V)
- Mounting: Wall/Table
- Rack Density: 3 units per 1RU
SPECIFICATIONS
POWER (PEAK)
Total Power
500 W
Normal Operation
8Ω
2 x 250W
4Ω
2 x 250W
70V
N/A
100V
N/A
Bridge-Mono Mode
8Ω
1 x 500W
4Ω
1 x 500W
70V
1 x 500W
100V
1 x 500W
POWER (RMS)
Total Power
300 W
Normal Operation
8Ω
2 x 150W
4Ω
2 x 150W
70V
N/A
100V
N/A
Bridge-Mono Mode
8Ω
1 x 300W
4Ω
1 x 300W
70V
1 x 300W
100V
1 x 300W
I/O
OUTPUT CIRCUITRY
UMAC™ Class-D – full bandwidth PWM modulator with ultra-low distortion
OUTPUT CHANNELS
Two Speaker Level Outputs via 4-pin Euroblock/Phoenix connector with 5.08 mm pitch.
INPUT CHANNELS
Two Analogue Balanced Line Level Inputs via 6-pin Euroblock/Phoenix connector with 3.50mm pitch summed with Two digital audio inputs via Dante/AES67, provided on RJ45 connector. Out 1 = A1 + D1, Out 2 = A2 + D2
DEFAULT GAIN
26 dB (Stereo Mode), 32dB (Bridged-Mono Mode)
FREQUENCY RESPONSE
20Hz - 20kHz (+/-0.3dB), 4Hz - 48kHz (-3dB)
TOTAL HARMONIC DISTORTION
<0.005% (1kHz, 5W, 8ohm load)
DYNAMIC RANGE
104 dBA
MAXIMUM INPUT LEVEL
+22 dBu (Analogue), 0dBFS (Digital)
INPUT IMPEDANCE
10kohm
LATENCY
N/A
CONTROL
CONTROLS AND INDICATORS (FRONT)
Per channel: Volume potentiometer. Per unit (applies to both channels): 80 Hz HPF switch, 100 Hz LPF switch, Bridge-Mono switch and Auto-Standby switch. LED Indicators: A (Blue/Orange) - Active/Standby/Mute P (Orange) - Protection/Mute S (Green) - Signal Detection L (Orange) - Limiter For a full list of possible combinations of LEDs during operation, please see Quick Start Guide.
CONTROLS AND INDICATORS (REAR)
ERR / CTRL / SNC / SYS (Dante Status) RST (Dante Factory Reset Switch)
CONTROL AND MONITORING
N/A
DIGITAL SIGNAL PROCESSING
N/A
PROTECTION CIRCUITS
Thermal protection, Over-Current Protection, DC Protection, HF Protection
ELECTRICAL
MAINS POWER INPUT
Universal Mains, 100-240V, 50-60 Hz
MAINS CONNECTOR
Standard IEC C14
POWER CONSUMPTION - STANDBY
2.0 W
POWER CONSUMPTION - IDLE
9.0 W
POWER CONSUMPTION - 1/8TH POWER / 8 ohm Load
53 W
POWER CONSUMPTION - 1/3RD POWER / 8 ohm Load
125 W
HEAT
HEAT GENERATED - STANDBY
1.4 BTU/hr / 0.3 kJ per hour
HEAT GENERATED - 1/8TH POWER / 8 ohm Load
43 BTU/hr / 11 kJ per hour
COOLING
Fan-Forced Air Cooling – Temperature-Dependent
FAN NOISE (ANECHOIC CHAMBER @ 1 m)
38 dB(A)
SIZE
RACK SIZE
1RU High and 1/3-Rack Width
DIMENSIONS (W x H x D)
125 x 44.5 x 330 mm (5.5 x 1.75 x 13")
WEIGHT
1.52 kg (3.5 lbs)
SHIPPING DIMENSIONS (W x H x D)
255 x 75 x 415 mm (10.0 × 2.95 × 16.3")
SHIPPING WEIGHT
2.6 kg (5.7 lbs)
ACCESSORIES
ACCESSORIES (INCLUDED)
Mains Cable, Feet, Euroblock/Phoenix Plugs, Rack Ears
ACCESSORIES (AVAILABLE SEPARATELY)
uRAK2 and WBQX300
OPTIONS
Analogue Version Available - QX500A
| Maximum Dynamic Power (@ 1kHz, 1% THD) (PEAK) |
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| Maximum Continuous Power (@ 1kHz, 1% THD) (RMS) |
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INSTALLATION ACCESSORIES
uRAK2
1RU rack mount for up to three QX300A/D or QX-500A/D amplifiers.
WBQX300
Wall/desk mount bracket for discreet QX300A/D or QX-500A/D amplifier installation.
