QD-4240 / QD-4480 / QD-4960:Quad Amplifier
The QD-4240/4480/4960 are four-channel amplifiers capable of driving 4Ω loads. Their clean sound quality makes them ideal for permanent installation in professional PA systems or for portable use for live performances.
Inputs are XLR/TRS “Combo” connectors; outputs are via rugged five-way binding post connectors. Clip-limiters are supplied on each channel to help prevent distortion due to excessive signal levels. All units have soft-start protection circuitry and feature power, signal, protection, and clip indicators on the front panel.
For added versatility, they may be operated in stereo, dual mono or bridged mono mode. The quad series amplifiers are powered by 100-120VAC or 220-240VAC 50/60Hz(depending on country requirements) and are packaged in 3.5” (2RU) high rack mount enclosures.
- FOUR CHANNEL AMPLIFIER
Four channels in a single chassis.
- ADVANCED PROTECTION CIRCUITRY
Thermal overload protection, DC detection circuitry and power-on delay help protect your amplifier and system components.
- BRIDGED MONO OPERATION
Can operate in monaural mode for high-power and performance.
- SLIM DESIGN, COMPACT SIZE
Streamlined design fits in a compact 2RU space.
- INTEGRATED CROSSOVER
The QX-4960 features a built-in crossover for easy and convenient system integration.
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) |
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Protection | Power SW ON/OFF muting Heatsink Temp ≥ 100˚C (212˚F) |
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PC Limiter | RL≺2Ω | RL=2Ω | ||||
Fan Circuit | –50˚C (122˚F)–60˚C (140˚F)– Low-Speed – Variable – Hi-Speed |
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Controls | (Front) Power SW: Push up On/Push down Of Attenuator: 21-position dB calibrated (Rear) Mode SW: Bridge=BTL/Stereo/Parallel |
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Power Source | AC 100–240V, 50/60Hz (Supplied AC mains transformer depends on country requirements) |
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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 |
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