CEILING SPEAKER

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(1) 기능

본 기기는 4.5인치 2웨이 천장형 스피커로 일정한 출력의 평탄한 음을 재생 가능하게 하는 DMT™기능이 있어야 하며, 하이임피던스 용 트랜스포머가 장착되어 16옴 뿐 아니라 70V 및 100V로 변환하여 전관방송에도 적합한 기기이어야 한다.

(2) 기기특성

- LF transducer	: 110mm[4.5in] weather treated

paper cone woofer

- HF transducer	: 19mm[.75in] aluminum dome

tweeter

- Effective frequency range	: 70Hz~20kHz

- Rated noise power/voltage	: 30watts/22volts (rms)

- Sensitivity[dB]	: Rated @1W, 1m; 87

EN54-24 @1W, 4m; 73

- Coverage(‐6dB)[°]	: Rated; 150 conical DMT

Horizontal/Vertical	500Hz; 176/176, 1kHz; 160/160

2kHz; 156/152, 4kHz; 103/111

- Declared values of SPL,	: 500:59.1; 630:59.4; 800:60.0;

1/3rd octave band CPB, 1W, 4m,	1,000:60.0; 1,250:61.0; 1,600:60.5;

EN54-24 eq applied[Hz:dB]	2,000:62.3; 2,500:61.0; 3,150: 58.0;

4,000: 62.2

- EN54-24 Equalization	: High Pass, 24dB/oct, Butterworth,

Fc; 70Hz

Low Shelf, 12dB/oct, (Q)1.2/

(BW)1.17, Fc; 340Hz, Gain; -5dB

High Shelf, 12dB/oct, (Q)0.8/

(BW)1.70, Fc; 6kHz, Gain; +5dB

- Directivity factor	: 4.5

- Directivity index[dB]	: 6.5

- Maximum SPL[dB]	: Rated, 1m (continuous/peak);

102/108

EN54-24, 4m (low-Z/Highest-tap);

85.51/86.52

- Recommended amplifier	: 60watts

- Transformer taps/impedance	: Bypass;16Ω

3.75W(70V); 7.5W(100V)

Tap; 1,333Ω

7.5W(70V); 15W(100V) Tap; 667Ω

15W(70V); 30W(100V) Tap; 333Ω

30W(70V); N/A(100V) Tap; 167Ω

- Input connector type	: Euroblock connector with parallel

output

- Enclosure material	: ABS baffle on powder coated steel

back can

- Grille material	: Powder coated steel

- Ingress protection	: IP-34

- Operating environment	: Designed for indoor use

- Operating temperature range	: -20 to 50 °C [-4 to 122 °F]

- Cutout dimension	: Φ195mm[Φ7.68in]

- Net weight	: 2.9kg[6.4lb]

- Product dimensions(Φ x H)	: Φ230 x 176 mm

[Φ9.06 x 6.94 in.]

- Shipping weight	: 9.3kg[20.5lb] (pair packed)

- Shipping dimensions(H x W x D)	: 279 x 711 x 318 mm

[11 x 28 x 12.5 in] (pair packed)

** AD-C4T 또는 동등 이상품 이어야 한다.