Qsc - Cx12T 电路图.pdf

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1、CX12T FEATURES 1675 MacArthur Boulevard Costa Mesa, California 92626-1468 USA Phone: 714/754-6175 Fax: 714/754-6174 CX Series Toroidal Output Transformers Provide Full Electrical Isolation and Meet Worldwide Safety Agency Approval Automatic Two-Speed, High Efficiency Fan CoolingFor Quiet Normal Oper

2、ation with Maximum Cooling on Demand Rear-to-Front Air FlowKeeps Equipment Racks Cool Front Panel Status LEDsIndicate Clip, Protect, Power and Signal Presence Rear Panel Detented Gain Controls For Security and Resetability Open Input ArchitectureFlexible Input Options Detachable Euro-Style Barrier S

3、trip InputEasy and Economical Connections Stereo, Bridge, or Parallel Operating ModesSwitch Selectable Double Thickness Rack EarsFor Extra Strength Covered Barrier Strip Output ConnectionsMeets Safety Agency Requirements Simple Barrier Strip Connection Determines Output Mode25 V, 70 V, 100 V and Dir

4、ect Outputs Available Simultaneously Built-in 45 Hz Subsonic Filter Prevents Speaker Transformer Saturation With Minimal Effect on Program Material he CX12T amplifier is ideal for use in any perma- nently installed sound system. Designed to meet the specialized needs of high power, high quality audi

5、o systems, the CX12T offers the features requested most by contractors and installers from around the world. The CX12T resides in a rugged three rack- space steel chassis approximately 17.9 inches deep. With high quality internal isolation transformers, the CX12T features built-in capability for dri

6、ving 25, 70 or 100 volt distributed sound systems as well as di- rect output voice coil loads. Versatile design allows a 25, 70 or 100 volt connection on one channel and a direct connection on the other channel. For maxi- mum flexibility, you can even drive a distributed line and a low impedance loa

7、d on the same channel at the same time! The CX12T features a built-in 45 Hz subsonic filter that reduces saturation of speaker transformers caused by excessively low frequencies. High output power, versatile loading options, high thermal capacity and rugged reliability make the CX amplifiers ideal f

8、or any high quality sound system installation. LOADOUTPUT POWER (Direct Outputs)OUTPUT POWER (Isolated Outputs) 45Hz-20kHz, 0.1% THD1kHz, 1% THD1 kHz, 0.1% THD Stereo (W/Ch) 8400 watts475 watts 4600 watts700 watts 2900 watts* 25 volts400 watts 70 volts500 watts 100 volts500 watts Mono-Bridged 16800

9、watts950 watts 81200 watts1400 watts 41800 watts* 50 volts800 watts 140 volts1000 watts 200 volts1000 watts *typical RadioFans.CN 收音机爱 好者资料库 FPO/BACK CX12T Specifications POWER OUTPUT Direct output, watts per channel, both channels driven 8, 45 Hz-20 kHz, 0.1% THD400 8, 1 kHz, 1% THD475 4, 45 Hz-20

10、kHz, 0.1% THD600 4, 1 kHz, 1% THD700 2, 1 kHz, 1% THD*900 Isolated outputs, watts per channel, both channels driven 70V or 100V, 1 kHz, 0.1% THD500 25V, 1 kHz, 0.1% THD400 Direct Outputs, bridged mono 8, 45 Hz-20 kHz, 0.1% THD1200 4, 1 kHz, 1% THD*1800 Isolated outputs, bridged mono 50V, 1 kHz, 0.1%

11、 THD800 140V, 1 kHz, 0.1% THD1000 200V, 1 kHz, 0.1% THD1000 DISTORTIONSMPTE-IM, less than 0.05%, direct outputs FREQUENCY RESPONSE Direct outputs:-3 dB 45 Hz*, -0.2 dB 20 kHz Isolated outputs:45 Hz*-16 kHz, +0, -3 dB * Low frequency response on “T” versions is limited by 18 dB/octave 45-Hz high-pass

12、 filter. DAMPING FACTOR200 ( direct outputs) OUTPUT REGULATION100V1.1 dB; 70V1.2 dB; 25V2.0 dB NOISE100 dB below rated output (20 Hz to 20 kHz) VOLTAGE GAIN direct outputs56.5x (35 dB) INPUT SENSITIVITY, VRMS for rated power, 81.00 INPUT IMPEDANCE10K unbalanced, 20K balanced CONTROLS Front: AC Switc

13、h Rear: Parallel/Stereo/Bridge Switch, Ch.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 he

14、ader Output:Covered barrier strips COOLING2-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 rel

15、ay with internal fault fuses OUTPUT CIRCUIT 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

16、power 2 per channel Multiply current by 0.5 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 25V, 70V, 100V21 A10.9 A5.7 A0.8 A DIMENSIONS Faceplate Wi

17、dthStandard 19 (48.3 cm) Rack Mounting Chassis Depth17.9 (45.5 cm) deep (to rear support ears) Faceplate Height5.25 (13.3 cm) WEIGHTShipping75 lb; 34 kg; Net67 lb; 30.4 kg ARCHITECTS AND ENGINEERS SPECIFICATIONS The amplifier shall contain all solid-state circuitry, using complementary silicon outpu

18、t devices. The amplifier shall exceed the efficiency of an or- dinary class-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 v

19、oltages 100,120, or 220-240 VAC. The amplifier shall operate from a normal 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

20、 intended operating voltage. The amplifier shall employ forced-air cooling 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

21、. The amplifier shall be capable of continuous operation at 1/8 power, into 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 sh

22、all be self resetting upon removal of fault, and the re- maining channel shall 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, an

23、d shall trigger fan speed boost, and if neces- sary, signal muting to prevent 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,

24、 consisting of a load-grounding relay with fault fusing to interrupt power. 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/

25、Stereo/Parallel mode switch, front panel displays consist of a green LED power-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 shro

26、uded barrier strip connectors. The input connector shall be mounted on a removable 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, a

27、nd a common mode rejec- tion of at least 50 dB from 20 Hz to 20 kHz. The standard 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 s

28、hall have enough space behind it to contain a circuit board measuring up to 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. Option

29、al XLR and 1/4” RTS input connectors may be installed in place of a standard blank panel, mounted above the standard input panel. Internally-mounted toroidal output transformers shall provide electrically isolated output taps for 25, 70, and 100 volt distributed lines. The direct amplifier output sh

30、all also be available to drive voice coil loads. The use of voice coil and distributed line operation is independent on each chan- nel. It is possible to use both the direct and isolated outputs simulta- neously on a single channel, as long as the total power rating of the am- plifier is not exceede

31、d. A built-in 45 Hz, third-order subsonic filter shall be provided to reduce saturation of speaker transformers, due to exces- sive low frequency program material. The filter is non-defeatable and affects all outputs. Each channel shall be capable of meeting the following performance cri- teria with

32、 both channels driven: Sine-wave output power of 400 watts into eight ohms, and 600 watts into four ohms, 45 Hz to 20 kHz, with less than O.1% THD. Frequency response at 3 dB below rated power shall be - 3 dB at 45 Hz and -0.2 dB at 20 kHz. The voltage gain shall be 56.5, equiva- lent to 35 dB, and

33、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 for the direct outputs. Output regula- tion, of the isolated outputs, shall not exceed 1.1 dB at 100 volts, 1.2 dB at 70 volts and 2.0 dB at

34、25 volts. The amplifier chassis shall 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 75 Ibs. (34 kg). The amplifier shall be the QSC Audio Products Model CX 12T. 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