Qsc - Mx2000A 电路图.pdf

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1、MX 2000a FEATURES A U D I O he MX 2000a 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 two rack spaces, providing high level performance under the most demand- ing conditions. A stepped linear output c

2、ircuit 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 40%. An automatic two- speed fan matches cooling capacity with ther- mal requirements. The rear panel uses Level 1 of Q

3、SCs 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 Phone:

4、 714/754-6175 Fax: 714/754-6174 MXa Series LOADFTC CONTINUOUS AVERAGEEIA WATTS 20Hz-20kHz, 0.1% THD1kHz, 1% THD Stereo (W/Ch) 8450 watts475 watts 4650 watts725 watts 21000 watts* Mono-Bridged 16900 watts950 watts 81300 watts1450 watts 42000 watts* *typical 1000 watts per channel at 2 ohms 725 watts

5、per channel at 4 ohms High efficiency, 2-step output circuit for improved thermal performance and lower AC current consumption Dual mono configuration independent power supply on each channel, for greater reliability Quiet 2-speed fan Independent DC, sub audio speaker protection one yellow LED signa

6、l 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 a removable panel to permit upgrades. The

7、 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 standard input panel shall contain switches for

8、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 wide by 4.1 “ deep. The multi-pin connect

9、or 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 both channels driven: Sine-wave output power

10、 of 450 watts into eight ohms, and 650 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 56, equivalent to 35dB, and the input sensitivity shall be 1.07 Vrms. The signal to noise

11、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 two rack spaces, with provision for securing the rear corners. Depth from mounting surface to tips of rear supports shall be 17.9 (45 5 cm). Weight shall no

12、t exceed 54 Ibs. (24.4 kg.). The amplifier shall be the QSC Audio Products Model MX 2000a. BACK MX 2000a 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) 8 ohms, 20 Hz to 20 kHz, 0.1%THD, 450 watt

13、s 8 ohms, 1kHz,1%THD, 475 watts 4 ohms, 20 Hz to 20 kHz, 0.1%THD, 650 watts 4 ohms, 1 kHz,1%THD, 725 watts 2 ohms, 1 kHz,1%THD, 1000 watts* OUTPUT POWER (bridged mono) 8 ohms, 20 Hz to 20 kHz, 0.1%THD, 1300 watts 4 ohms, 1 kHz,1%THD 2000 watts* *typical DISTORTION: SMPTE-IM, less than 0.05% FREQUENC

14、Y 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: 1.07 Vrms for rated power (8 ohms) VOLTAGE GAIN: 56 (35 dB) INPUT IMPEDANCE: 10K unbalanced, 20K balanced C

15、ONTROLS: 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 binding posts COOLING: Two-speed fan, rear-to-fro

16、nt air flow. AMPLIFIER PROTECTION: Full short circuit, open circuit, ultrasonic, and RF protection. Stable into reactive or mismatched loads. LOAD PROTECTION: On/off muting. DC-fault load grounding relay with internal fault fuses. OUTPUT CIRCUIT TYPE: Complementary linear outputs, 2 step high effici

17、ency 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): 37 amps, 120 Vac (4450 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: 54 Ibs (24.4 kg) net, 62 Ibs (28.0 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