Inter-M Power Amplifier QD Series

 


MODEL QD-4240 QD-4480 QD-4960 QX4960
Rated Output (RMS) f=1kHz, THD+N≤0.05% (Typical)
QUAD RL=8Ω 40W 80W 170W
RL=4Ω 60W 120W 240W
BRIDGED STEREO RL=8Ω 120W 240W 480W
One Channel Driven
f=1KHz THD+N≤0.05% RL=4Ω 60W 120W 240W
Frequency Response RL=8Ω, P=1W 20Hz~50kHz (±0.5dB)
Power Bandwidth Half Power, THD+N≤0.1% QUAD RL=8Ω 10Hz~70kHz 10Hz~20kHz
Total Harmonic Distortion (THD+N)
f=20Hz~20kHz, Half Power
QUAD RL=8Ω ≤ 0.05%
RL=4Ω ≤ 0.07%
BRIDGED RL=8Ω ≤ 0.07%
Channel Separation Half Power RL=8Ω, f=1kHz, ATT. max. Input 600Ω shunt ≥ 80dB
Residual Noise (DIN Audio Filter) ≤ –70dB: ATT min. ≤ –85dB: ATT min.
Signal-to-Noise Ratio DIN Audio, Input 600Ω Shunt ≥100dB
Sensitivity (ATT max.) Rated Power into 4Ω 1kHz 0dB
Input Impedance (ATT max.) ≥ 20kΩ (Balance/Unbalance)
Indicators Power  (Red)
Protection (Mute) x 4 (Red)
Clip x 4 (Red)
Signal x 4 (Green)
Power  (Red)
Protection (Mute) x 4 (Red)
Clip x 4 (Orange)
Signal x 4 (Green)
Protection Power SW ON/OFF muting
Heatsink Temp ≥ 100˚C (212˚F)
PC Limiter RL≺2Ω RL=2Ω
Fan Circuit –50˚C (122˚F)–60˚C (140˚F)–
Low-Speed – Variable – Hi-Speed
Controls (Front) Power SW: Push up On/Push down Of
Attenuator: 21-position dB calibrated
(Rear) Mode SW: Bridge=BTL/Stereo/Parallel
Power Source AC 100–240V, 50/60Hz
(Supplied AC mains transformer depends on country requirements)
Power Consumption (1/8 Power) 300W 420W 770W
Weight 11.5kg/25.3lb 15.5kg/34.2lb 17kg/37.5lb
Dimensions  482(W) x 88(H) x 369(D) mm/19(W) x 3.5(H) x 14.5(D) in
Connectors  Input : Combination Jack (balance)
Output : 5-Way binding posts x 4