POWER AMPLIFIERS

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(1) 기능

본 기기는 4채널 앰프로서 QSC PowerLight 기술을 특정 기능들과 결합하여 고정 설치 요건을 충족시켜야 하며 HD15 Data Port 커넥터가 있어 이를 QSControl(컴퓨터 제어 음향장치)와 연결하여 이더넷 망을 통해 앰프를 원격으로 모니터링, 제어를 할 수 있어야 한다. 최상의 음질과 고출력이 요구된 설치 환경에 적합한 기기이어야 하고, AC전원의 험 노이즈를 제거하고 음질을 개선시키면서도 앰프 자체 무게를 줄일 수 있는 PowerLight 전원 공급 기술을 채택한 기기이어야 한다.

(2) 기기특성

- Stereo mode(both channels driven)

8Ω/20Hz~20kHz/0.05% THD	: 170W

4Ω/20Hz~20kHz/0.05% THD	: 250W

2Ω/1kHZ/1% THD	: 450W

70V/20Hz~20 kHz/0.05% THD	: -

70V/1kHz/0.05% THD	: -

70V/1kHz/1% THD	: -

- Bridge mono mode

16Ω/20Hz~20kHz/0.1% THD	: 340W

8Ω/20Hz~20kHz/0.1% THD	: 500W

4Ω/1kHz/1% THD	: 900W

140V/20Hz~20kHz/0.1% THD	: -

140V/1kHz/0.05% THD	: -

140V/1kHz/1% THD	: -

Noise(20Hz~20kHz)	: -106dB

- Input sensitivity	: 1.22Vrms

- Gain	: 29dB at 8Ω

Input clipping	: 10Vrms(+22dBu)

- Output circuitry	: Class AB+B

- Distortion(SMPTE-IM)	: < 0.01%

- Distortion(typical)

20Hz~20kHz:10dB below rated power	: < 0.01% THD

1.0kHz and below: full rated power	: < 0.01% THD

- Frequency response	: 20Hz~20kHz, ±0.2dB

8Hz~50kHz, +0/-3dB

- Damping factor	: > 500(1kHz and below)

- Input impedance	: 6k ohms unbalanced,

12k ohms balanced

Cooling	: Variable-speed fan/

rear-to-front air flow

through tunnel heat sink

- Connectors

Input	: 3position euro style detachable

barrier block, Ch1, 2, 3&4

Dataport/HD-15 connector,

Ch1+2, Ch3+4

Output	: Six-position barrier strip with dual

channel and bridge mono

connections, Ch1+2, Ch3+4

Controls

Front	: AC swith, Ch1, 2, 3&4 gain knobs

Rear	: DIP switch for Ch1, 2, 3&4,

clip limiter on/off, LF filter on/off,

LF filter freq select 33Hz or 75Hz

CX254 and CX404: 50Hz or 75Hz

CX204V: inputs parallel or stereo,

bridge mode

Indicatiors

Parallel inputs	: Yellow LED

Bridged	: Yellow LED

Power-on	: Green LED

Clip-port	: Red LED

Level -10dB	: Green LED

Level -20dB	: Green LED

Signal –35dB	: Green LED(1per channel)

- Amplifier protection	: Full short circuit, open circuit,

thermal, ultrasonic, RF protection.

stable into reactive or mismatched

loads

- Load protection	: On/off muting,

DC-fault power supply shutdown

- Dimensions(HxWxD)	: 3.5”(8.9cm) 2RU x 19”(48.3cm)

rack mounting x 14”(35.6cm)

from front mounting rails

- Weight

Net	: 21Ib(9.5kg)

Shipping	: 27Ib(12.3kg)

- Power Requirements	: 100, 120, 230 VAC,

50~60Hz(configured at factory)

120V current consumption	: Idle/0.7A

1/8 power pink noise(typical of program	: 8Ω/5.8A, 4Ω/9.2A, 2Ω/14.3A

material at maximum unclipped power)	70V/-

1/3 power pink noise(typical of program	: 8Ω/8.8A, 4Ω/14.2A, 2Ω/21.7A

material with servere clipping)	70V/-

** CX254 또는 동등 이상품 이어야 한다.