Qsc - Mx3000A 电路图.pdf

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1、MX 3000a FEATURES A U D I O he MX 3000a is a high power, low profile pro- fessional power amplifier with advanced fea- tures and a flexible input. It delivers tremen- dous power in only three rack spaces, provid- ing high level performance under the most de- manding conditions. A stepped linear outp

2、ut circuit combines high power with high efficiency to provide greater average and dynamic audio performance, while reducing normal system cooling and AC require- ments by greater than 50%. An automatic vari- able speed fan matches cooling capacity with heat requirements. The rear panel uses Level 1

3、 of QSCs exclusive Open Input Architecture which allows the use of optional input connectors, input transform- ers, cinema crossovers, power limiters, preci- sion attenuators, and other signal processing cards as they become available. 1675 MacArthur Boulevard Costa Mesa, California 92626-1468 USA P

4、hone: 714/754-6175 Fax: 714/754-6174 MXa Series LOADFTC CONTINUOUS AVERAGEEIA WATTS 20Hz-20kHz, 0.1% THD1kHz, 1% THD Stereo (W/Ch) 8800 watts825 watts 41200 watts1250 watts 21600 watts* Mono-Bridged 161600 watts1650 watts 82400 watts2500 watts 43200 watts* *typical 1600 watts per channel at 2 ohms 1

5、250 watts per channel at 4 ohms High efficiency, 3-step output circuit for improved thermal performance and lower AC current consumption Built-in clip limiter Dual mono configurationfor greater reliability, independent power supply on each channel Quiet variable speed fan Independent DC and sub audi

6、o speaker protection one yellow LED signal indi- cator, triggering at -30 dB; a red LED showing true amplifier clipping; and a red LED which indicates muting when illuminated. The output connectors for each channel shall include a touch proof bind- ing post. The input connectors shall be mounted on

7、a removable panel to permit upgrades. The standard input panel shall provide barrier strip and 1/4 connections for each channel. Inputs shall be electronically balanced, with a minimum impedance of 10 kilohms per side, and a common mode rejec- tion of at least 50 dB from 20 Hz to 20 kHz. The standar

8、d input panel shall contain switches for mono-bridging and parallel inputs, and solder pat- terns for input isolation transformers, gain reduction resistors, and first- order high and low pass filters . The input panel shall have enough space behind it to contain a circuit board measuring up to 5.9

9、wide by 4.1 “ deep. The multi-pin connector to the amplifier circuitry shall supply positive and negative DC supply cur- rents, and for each channel, balanced input signals, output signal, and clip/protect signal. Each channel shall be capable of meeting the following performance cri- teria with bot

10、h channels driven: Sine-wave output power of 800 watts into eight ohms, and 1200 watts into four ohms, 20Hz to 20kHz, with less than O.1% THD. Frequency response at 3dB below rated power shall be 20Hz to 20kHz within O.15 dB. The voltage gain shall be 80, equivalent to 38dB, and the input sensitivit

11、y shall be 1.0 Vrms. The signal to noise ratio over the range of 20 Hz to 20 kHz shall exceed 100 dB unweighted. IHF damping factor shall exceed 200. The amplifier chassis shall occupy three rack spaces, with provision for securing the rear corners. Depth from mounting surface to tips of rear suppor

12、ts shall be 17.9 (45 5 cm). Weight shall not exceed 69 Ibs. (31.2 kg.). The amplifier shall be the QSC Audio Products Model MX 3000a. BACK MX 3000a Specifications A U D I O 1675 MacArthur Boulevard Costa Mesa, California 92626-1468 USA Phone: 714/754-6175 Fax: 714/754-6174 OUTPUT POWER (per channel)

13、 8 ohms, 20 Hz to 20 kHz, 0.1%THD, 800 watts 8 ohms, 1kHz,1%THD, 825 watts 4 ohms, 20 Hz to 20 kHz, 0.1%THD, 1200 watts 4 ohms, 1 kHz,1%THD, 1250 watts 2 ohms, 1 kHz,1%THD, 1600 watts* OUTPUT POWER (bridged mono) 8 ohms, 20 Hz to 20 kHz, 0.1%THD, 2400 watts 4 ohms, 1 kHz,1%THD 3200 watts* *typical D

14、ISTORTION: SMPTE-IM, less than 0.05% FREQUENCY RESPONSE: 20 Hz to 20 kHz, 0.15 dB 8 Hz to 100 kHz, +0/-3 dB DAMPING FACTOR: Greater than 200 DYNAMIC HEADROOM: 3 dB at 4 ohms NOISE: 100 dB below rated output (20 Hz to 20 kHz) SENSITIVITY: 1.0 Vrms for rated power (8 ohms) VOLTAGE GAIN: 80 (38 dB) INP

15、UT IMPEDANCE: 10K unbalanced, 20K balanced CONTROLS: Front: AC Switch, Ch 1 and Ch 2 Gain Knobs Back: Parallel/Stereo/Bridge Switch INDICATORS: PWR-ON:Green LED SIGNAL PRESENT: Yellow LED CLIP:Red LED PROT:Red LED CONNECTORS: (each channel) Input:Barrier strip and 1/4 RTS Speakers: Touch proof bindi

16、ng posts COOLING: Variable speed fan, rear-to-front air flow. AMPLIFIER PROTECTION: Full short circuit, open circuit, ultrasonic, and RF protection. Stable into reactive or mismatched loads. LOAD PROTECTION: On/off muting. Clip limiting. DC-fault load grounding relay with internal fault fuses. OUTPU

17、T CIRCUIT TYPE: Complementary linear outputs, 3 step high efficiency circuit. POWER REQUIREMENTS: 100,120, 240 Vac, 50-60 Hz POWER CONSUMPTION: Normal Operation: 4 ohms per channel: less than 12 amps, 120 Vac (1440 VA) maximum (full power, 2 ohms per channel): 58 amps, 120 Vac (7000 VA) DIMENSIONS: 19.0 (48.3 cm) rack mounting 5.25 (13.3 cm) tall (3 spaces) 17.9 (45.5 cm) deep (rear support ears) WEIGHT: 69 Ibs (31.2 kg) net, 77 Ibs (34.9 kg) shipping Output Averaging short circuit protection (US Patent 4,321,554) SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE. RadioFans.CN 收音机爱 好者资料库