Qsc - Cx12 电路图.pdf

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1、CX12 FEATURES 1675 MacArthur Boulevard Costa Mesa, California 92626-1468 USA Phone: 714/754-6175 Fax: 714/754-6174 CX Series Automatic Two-Speed, High Efficiency Fan CoolingFor Quiet Normal Operation with Maximum Cooling on Demand Rear-to-Front Air FlowKeeps Equipment Racks Cool Front Panel Status L

2、EDsIndicate Clip, Protect, Power and Signal Presence Rear Panel Detented Gain Controls For Security and Resetability Open Input ArchitectureFlexible Input Options Detachable Euro-Style Barrier Strip InputEasy and Economical Connections Stereo, Bridge, or Parallel Operating ModesSwitch Selectable Dou

3、ble Thickness Rack EarsFor Extra Strength Covered Barrier Strip Output ConnectionsMeets Safety Agency Requirements he CX12 amplifier is ideal for use in any permanently installed sound system. Designed to meet the specialized needs of high power, high quality audio systems, the CX12 offers the featu

4、res requested most by contractors and installers from around the world. Rear panel gain controls offer extra security and front panel status LEDs offer easy indication of the amplifier conditions. Per channel power ratings of 400 watts at 8 ohms, LOADOUTPUT POWER 20Hz-20kHz, 0.1% THD1kHz, 1% THD Ste

5、reo (W/Ch) 8400 watts475 watts 4600 watts700 watts 2900 watts* Mono-Bridged 16800 watts950 watts 81200 watts1400 watts 41800 watts* *typical 600 watts at 4 ohms and 900 watts at 2 ohms make the CX12 an economical choice for direct output applications that dont require the output transformers of the

6、CX 12T. The CX12 resides in a rugged three rack-space steel chassis approxi- mately 17.9 inches deep. High output power, high thermal capacity and rugged reliability make the CX amplifiers ideal for any high performance sound system installation. RadioFans.CN 收音机爱 好者资料库 FPO/BACK CX12 Specifications

7、POWER OUTPUT Direct output, watts per channel, both channels driven 8, 20 Hz-20 kHz, 0.1% THD400 8, 1 kHz, 1% THD475 4, 20 Hz-20 kHz, 0.1% THD600 4, 1 kHz, 1% THD700 2, 1 kHz, 1% THD*900 Direct Outputs, bridged mono 8 20 Hz-20 kHz, 0.1% THD1200 4, 1 kHz, 1% THD*1800 *typical DISTORTIONSMPTE-IM, less

8、 than 0.05% FREQUENCY RESPONSE20 Hz-20 kHz, 0.2 dB DAMPING FACTOR200 NOISE100 dB below rated output (20 Hz to 20 kHz) VOLTAGE GAIN56.5x (35 dB) INPUT SENSITIVITY, VRMS for rated power, 81.00 INPUT IMPEDANCE10K unbalanced, 20K balanced CONTROLS Front: AC Switch Rear: Parallel/Stereo/Bridge Switch, Ch

9、.1 and Ch. 2 Attenuator Knobs (11 detents: 0, -2, -4, -6, -8, -10, -12, -14, -18, -24, off) FRONT PANEL/INDICATORS (per channel) PROTECT:Red LED CLIP:Red LED SIGNAL:Yellow LED POWER:Green LED REAR PANEL/CONNECTORS (each channel) Input:Euro-style detachable header Output:Covered barrier strips COOLIN

10、G2-speed fan, with back-to-front air flow AMPLIFIER PROTECTION Output Averaging short circuit protection, open circuit, ultrasonic, RF, thermal muting Stable into reactive or mismatched loads LOAD PROTECTIONTurn-on/turn-off muting, DC-fault load grounding relay with internal fault fuses OUTPUT CIRCU

11、IT TYPEClass H complementary linear stage, with 2-step high-efficiency circuit POWER REQUIREMENTS:100, 120, 220-240 VAC, 50/60 Hz POWER CONSUMPTION Normal operation: 1/8 power 4 per channel Worst case continuous program: 1/3 power 2 per channel Maximum: full power 2 per channel Multiply current by 0

12、.5 for 220-240 VAC operation Channel LoadAC Current, Full PowerAC Current, 1/3 PowerAC Current, 1/8 PowerAC Current, Idle 8 + 814.7 A8.4 A4.5 A0.8 A 4 + 423 A12.4 A6.1 A0.8 A 2 + 233 A16.5 A8.0 A0.8 A DIMENSIONS Faceplate WidthStandard 19 (48.3 cm) Rack Mounting Chassis Depth17.9 (45.5 cm) deep (to

13、rear support ears) Faceplate Height5.25 (13.3 cm) WEIGHTShipping58 lb; 26.3 kg; Net50 lb; 22.7 kg ARCHITECTS AND ENGINEERS SPECIFICATIONS The amplifier shall contain all solid-state circuitry, using complementary silicon output devices. The amplifier shall exceed the efficiency of an or- dinary clas

14、s-B linear output circuit. Overall electrical efficiency, with four or eight-ohm loads, shall exceed 40% at 1/3 power and 30% at 1/8 power. The amplifier shall operate from 50-60 Hz AC power, with internal taps for selecting voltages 100,120, or 220-240 VAC. The amplifier shall operate from a normal

15、 household AC outlet, drawing less than 750 VA when driven with random program material at 1/8 rated power into four ohm loads. The amplifier shall be supplied with a single molded AC cord having an appropriate AC plug for the intended operating voltage. The amplifier shall employ forced-air cooling

16、 with a two speed fan for minimum acoustic noise. Air flow shall be from rear to front to avoid tem- perature rise inside the rack. Rack mounting shall be possible without clearance necessary between amplifiers for ventilation. The amplifier shall be capable of continuous operation at 1/8 power, int

17、o four-ohm loads, for ambient temperatures up to 104 F (40 C). The amplifier shall contain two independent channels, with separate AC transformer secondaries, power supplies, and protection systems. All pro- tection systems shall be self resetting upon removal of fault, and the re- maining channel s

18、hall continue to operate. Each channel shall have inde- pendent protective circuitry against open circuit, short circuit, or mis- matched loads. Each channel shall monitor temperature of its heat sink and power transformer, and shall trigger fan speed boost, and if neces- sary, signal muting to prev

19、ent excessive temperature rise. Each channel shall have on-off muting, acting for three seconds after turn-on, and within 1/4 second after turn-off or loss of AC power. Each channel shall have DC fault protection for the load, consisting of a load-grounding relay with fault fusing to interrupt power

20、. Fault fuses shall be adequately large to prevent nuisance blowing at any output power the amplifier is capable of delivering. Each channel shall have the following controls and displays: A rear panel Gain control and Bridge/Stereo/Parallel mode switch, front panel displays consist of a green LED p

21、ower-on indicator; one yellow LED signal indica- tor, 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 be shrouded barrier strip connectors. The input connector shall be mounted on a r

22、emovable panel to permit upgrades. The standard input panel shall provide detachable Euro-style header con- nections 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 s

23、tandard 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 t

24、o 5.9 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. Optional XLR and 1/4” RTS input connectors may be installed in place of a standa

25、rd blank panel, mounted above the standard input panel. Each channel shall be capable of meeting the following performance cri- teria with both channels driven: Sine-wave output power of 400 watts into eight ohms, and 600 watts into four ohms, 20 Hz to 20 kHz, with less than O.1% THD. Frequency resp

26、onse at 3 dB below rated power shall be within 0.2 dB. The voltage gain shall be 56.5, equivalent to 35 dB, and the input sensitivity shall be 1.00 Vrms. The signal to noise ratio over the range of 20 Hz to 20 kHz shall exceed 100 dB. IHF damping factor shall exceed 200. The amplifier chassis shall

27、occupy three 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 not exceed 50 Ibs. (22.7 kg). The amplifier shall be the QSC Audio Products Model CX12. 1675 MacArthur Boulevard Costa Mesa, California 92626-1468 USA Phone: 714/754-6175 Fax: 714/754-6174 RadioFans.CN 收音机爱 好者资料库