Qsc - Pl24Mb 电路图.pdf

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1、FEATURES 1675 MacArthur Boulevard Costa Mesa, California 92626-1468 USA Ph: 714/754-6175 Fax: 714/754-6174 Web: E-mail: PowerLight? T PowerLightPowerLightPowerLightPowerLightPowerLight 2.42.42.42.42.4MB MBMBMBMB he PowerLight 2.4MB is an advanced, professional, mono-block audio amplifier featuring u

2、ncompromised audio performance. A new high frequency power supply, utilizing QSCs PowerWave Switching Technology, has been combined with the rugged audio amplification circuits of traditional QSC amplifiers to produce an amplifier with incredible reliability, thermal capacity and audio performance.

3、The PowerLight 2.4MB is rated at 1050 watts into 8 ohms, 1700 watts into 4 ohms, and 2400 watts into 2 ohms, making it ideal for powering subwoofers and high power, passive, full-range speaker systems. A high-efficiency, 3-step output circuit reduces AC current draw and improves performance with low

4、 impedance loads. Outstanding audio performance and reliability, networkability, and light weight make this amplifier ideal for all critical sound system applications. Ideal for powering subwoofers and high power, passive full- range speakers 2400 watts at 2 ohms 1700 watts at 4 ohms 1050 watts at 8

5、 ohms (guaranteed minimum specs) Advanced thermal management system Clip Limiter (user defeatable) reduces distortion, protects loud speakers PowerWave Switching Technologyfor improved audio performance Detented gain control with 2 dB steps for easy resetting Comprehensive LED status arrays High-eff

6、iciency, 3-step output circuit for improved thermal performance and lower AC current consumption120V units work on standard outlets Two variable speed fans, for quiet operation DC, sub audio, and thermal overload protection Patented Output Averaging short-circuit protection Neutrik ”Combo“ (XLR 2202

7、40 V units shall be equipped with a 320-C19 16A IEC mains connector and a removable power cord. The amplifier shall comply with FCC part 15 Class B requirements. The amplifier shall employ forced-air cooling with two variable speed fans for minimum acoustic noise. Air flow shall be from rear to fron

8、t to avoid tempera- ture rise inside the rack. Rack mounting shall be possible without clearance between amplifiers for ventilation. The amplifier shall be capable of continu- ous operation at 1/3 power into a four-ohm load, in ambient temperatures up to 104F (40C). The amplifier shall contain one a

9、mplifier channel with a switching power sup- ply. All amplifier protection systems shall be self-resetting upon removal of fault. The channel shall have protective circuitry against short circuit or mis- matched loads. The channel shall monitor heat sink temperature and shall trigger fan speed boost

10、, and if necessary, signal muting to prevent excessive temperature rise. The channel shall have on-off muting, acting for three sec- onds after turn-on, and within second after turn-off or loss of AC power. The channel shall have DC fault protection for the load, consisting of a power sup- ply shutd

11、own. The channel shall have a user-defeatable clip limiter. The front panel shall contain the AC power switch; a green LED power-on indicator; a yellow LED standby indicator and a red protect mode indicator. It shall also have the following controls and displays: a front panel detented gain control,

12、 with 11 gain settings (38 dB, 36 dB, 34 dB, 32 dB, 30 dB, 28 dB, 26 dB, 24 dB, 20 dB, 16 dB, -); a recessed front panel clip limiter defeat switch; a green signal present LED triggering at -30 dB; two yellow LED output indica- tors, triggering at -20 dB and -10 dB; a red LED showing true amplifier

13、clipping. The output connectors shall be “touchproof” binding posts, accepting banana plugs or up to 7 AWG (4 mm dia.) wire. The output connectors shall be ar- ranged in two parallel pairs. The rear panel input shall provide barrier strip and two Neutrik “Combo” con- nectors, connected in parallel t

14、o facilitate “daisy-chaining” the input sig- nal to other amlifiers. The XLR input shall be wired with pin 2 high, the TRS input shall be wired with tip positive, ring negative, and sleeve grounded. The inputs shall be electronically balanced, with a minimum impedance of 10 kilohms per side, and a c

15、ommon mode rejection of at least 50 dB from 20 Hz to 20 kHz. A High Density 15-pin Data Port connector shall carry both audio and amplifier operational status signals to and from a QSC MultiSignal Processor. A two-position barrier strip on the rear panel shall be used for remote Power Supply Enable;

16、 a contact closure shall place the both amplifier channels in standby mode, when the front panel power switch is in the on position. The front panel power switch shall function as a master switch that removes all AC power. The amplifier channel shall be capable of meeting the following performance c

17、riteria: sine-wave output power of 1000 watts into 8 ohms, and 1550 watts into 4 ohms, 20 Hz to 20 kHz, with less than 0.1% THD. Power into 2-ohm loads shall be 2400 watts at 1 kHz and no more than 1% THD. Frequency response at 3 dB below rated power shall be 20 Hz to 20 kHz within 0.15 dB. The volt

18、age gain shall be 80, equivalent to 38 dB, and the input sensitivity shall be 1.11 Vrms. The signal to noise ratio over the range of 20 Hz to 20 kHz shall exceed 108 dB relative to full output. IHF damping factor shall exceed 350. 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 not exceed 18 lbs. (8.2 kg.). The amplifier shall be the QSC Audio Products PowerLight 2.4MB. RadioFans.CN 收音机爱 好者资料库