Inter-M QD-4240 เครื่องขยายเสียง 4 CHANNEL PROFESSIONAL AMPLIFIER, 4 CHANNEL 40W (8Ω)/60W (4Ω), BRIDGED STEREO 120W (8Ω), 2U SIZE
Overview
The QD-4240 is a quad, four channel power amplifier 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. Primarily designed for multi-zone use such as in bars and restaurants, where separate control of the music in several areas is required, these designs may be applicable for use in any situation where a number of low-power amplifiers are required, such as for cue-feeds, effects-loudspeakers, museum displays etc. Three models are available; each combines four separate low-impedance amplifiers in a single 2U rack-mounted case. Each amplifier has an individual input XLR/TRS "Combo" balanced input connector, a level-control with associated signal-present and clip LED’s, and 5 way binding-post speaker output terminals. For added versatility, an input-selector switch allows each pair of amplifiers to be driven either separately (stereo), with inputs in parallel (dual mono), or bridged into mono. 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. These amplifiers are fan-cooled with circuit-protection and turn-on delay. The quad series amplifiers are powered by 100-120VAC or 220-240VAC 50/60Hz (depending on country requirements).
Feature
Specification
QD-4240
QD-4480
QD-4960
Power Output
4 Ω (Quad Ch)
40W
80W
170W
8 Ω (Quad Ch)
60W
120W
240W
8 Ω BridgedMono
480W
Input Sensitivity (8 Ω , 1kHz)
0.775Vrms
Input Impedance
20k Ω Balanced
Slew Rate ( 8 Ω , Full Swing)
± 30V/ μsec
Frequency Response ( ±0.5dB)
20Hz - 50kHz
THD
<0.03%
Signal-to-Noise Ratio
105dB
Damping Factor (8 Ω, 1kHz)
>100
Residual Noise
-85dB
Channel Separation (8 Ω , 1kHz)
80dB
Voltage Gain (4 Ω )
26dB
29dB
32dB
Power Source
100-120VAC or 220-240VAC
Power Consumption
300W
420W
770W
Weight (SET)
11.5kg/30.8lb
15.5kg/41.5lb
17kg/45.5lb
Dimensions (SET)
482(W) x 88(H) x 369(D)mm / 19(W) x 3.5(H) x 14.5(D)in