Qsc - 3800 Spec Sheet 电路图.pdf

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1、? ? c SERIES THREE AMPLIFIERS FROM QSC MODEL 3800 Series Three has been designed to be the most advanced ampli- fier line available. It was conceived, engineered, and refined with input from many leading pro audio system designers, operators, and users. Its a combination of advanced features not fou

2、nd else- where. Low profile chassis, front-removable channel modules, detented and recessed gain controls, true dual-mono configu- ration, high efficiency low heat output circuit, and the latest in high-performance/high quality components. The Model 3800 is an ultra high-power amplifier designed exp

3、licitly for the most demanding and heavily loaded professional applications. As such, it makes a perfect match with todays new FEATURES I Low Profile Chassis. I 375 watts per channel at 8 ohms. I 600 watts per channel at 4 ohms. I 850 watts per channel at 2 ohms. I Dual-Mono Configuration. I High-Ef

4、ficiency Output Circuit. I Passive Cooling. I Front-Removable Channel Modules. I Recessed Front Controls. high power handling speakers. The Model 3800 is a high cur- rent version of our Model 3500 but with a larger power supply, more output devices, and 50% more heatsink area. Its capable of deliver

5、ing tremendous amounts of power at low impedances. The Model 3800 has an extremely conservative and rugged output section consisting of 20 Large SOA (Safe Operating Area), high-speed, MESA output devices per channel (40 total). This abundant use of costly output devices combined with our patented OU

6、TPUT AVERAGING short-circuit protection assure years of trouble-free service even under the most abusive conditions. I Precision 31-Step Gain Controls. I Complete LED Monitoring. I Octal Input Socket. I Active Balanced Inputs. I 1/4 RTS, XLR, and Barrier Inputs. I Dual Binding Post Outputs per Chann

7、el. I Three-Year Warranty RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS ARCHITECTS AND MODEL 3800 OUTPUT POWER (per channel) Continuous Average Output Power Bridged-mono operation. both channels driven 16 ohms, 2020kHz, 0.1% THD 720 8 ohms, 2020kHz, 0.1% THD 375 1 kHz, 1% THD 880 1 kHz, 1% THD 440 8 ohms,

8、2020kHz, 0.1% THD 1,200 4 ohms, 2020kHz, 0.1% THD 600 1 kHz, 1% THD 1,500 1 kHz, 1% THD 750 4 ohms, 2020kHz, 0.2% THD 1,700 2 ohms, 2020kHz, 0.2% THD 850 1 kHz, 1% THD 2,200 1 kHz, 1% THD 1,100 DISTORTlON (8 ohms) THD: 2020kHz at rated power shall be less than 0.1% SMPTE-IMD: less than 0.025% at rat

9、ed power FREQUENCY RESPONSE 2020kHz, 0.1dB 8300kHz, +0/-3dB DAMPING FACTOR Greater than 200 DYNAMIC HEADROOM 2dB at 4 ohms NOISE SENSITlVlTY INPUT IMPEDANCE CONTROLS -100dB 2020kHz at rated power 1V RMS for rated power at 8 ohms 20K balanced or 10K unbalanced Front: Recessed detented gain control, A

10、C switch/circuit breaker far each channel. INDICATORS (per channel) COOLING Rear: Mono-bridging and input accessory module switches. Bicolor LED indicating DC power, OK/Protect mode, LED clip indicator, -30dB and -6dB signal level indicators, flashing overtemp indicator. Passive-combined with high-e

11、fficiency output stage for 50% reduction in dissipated heat. Unique circuit configuration provides direct-metal mounting of output devices to minimize short-term thermal excursions of power transistors. Fan-assisted cooling recommended for high duty cvcles at 2 ohms. AMPLIFIER PROTECTION LOAD PROTEC

12、TION lndefinite short-circuit* open-circuit, over-temp, ultrasonic and RF protection. Stable into reactive and mismatched loads. Inputs protected from overload *Output Averaging Short Circuit Protection (US Patent 4,321,554) lndividual channel output relays provide DC Fault, 3 second delayed turn-on

13、 (transient protection), and excessive Iow- frequency protection. Instant turn-off, pop suppression and power interrupt protect is also provided. OUTPUT TYPE OUTPUT DEVICES (total) POWER SUPPLIES POWER REQUIREMENTS DIMENSIONS WEIGHT Full complementary two-level high efficiency 40 A complete separate

14、 power supply for each channel including AC switch/circuit breaker and AC cord. 120, 220, or 240V 5060 Hz, 13A (each channel) Faceplate 19x5.25 Depth 17.9 (with rear supports) 15.9” (chassis only) 75 Ib. (Net) 83 Ib. (Shipping) Specifications subject to change without notice. ENGINEERS SPECIFICATION

15、S The amplifier shall contain all solid-state circuitry, using complementary silicon transistors and integrated circuits It shall be capable of operating from 120, 220 or 240V 5060Hz AC mains with internally selectable jumpers. The amplifier shall contain two fully independent channels, with separat

16、e AC breaker/switches, power transformers, and protective systems. Each channel shall have independent protective circuitry against open-circuit, short-circuit or mismatched loads; independent thermal warning and shutdown circuits, and independent load protection circuits for turn on/off transients

17、includ- ing momentary AC dropouts and DC faults within or preceding the amplifier All protective cir- cuits except AC circuit breaker shall be self-resetting. The remaining channel shall continue to operate, in stereo or bridged-mono mode. Each channel of the amplifier shall be capable of meeting th

18、e following performance criteria, with both channels driven simultaneously. Output power into 8 ohms 375 watts, 2020kHz, less than 0.1% THD. Output power into 4 ohms 600 watts, 2020kHz, less than 0.1% THD. Output power into 2 ohms 850 watts, 2020kHz, less than 0.2% THD. Frequency response shall be 2

19、020kHz, with less than 0.1 dB deviation. The voltage gain shall be 34.5dB at full Gain. The power gain (into 8 ohms) shall be 65.5 dB at full gain. The input sensitivity for rated 8-ohm power shall be 1V RMS. Balanced bridging input circuitry shall be standard, and the amplifier shall meet all perfo

20、rmance criteria in the balanced or unbalanced mode. Input impedance shall be 20k ohms balanced, or 10k ohms unbalanced. Noise level shall be at least 100dB below rated power, at full Gain. IHF damping factor shall exceed 200. The amplifier shall be passively cooled, with no fans or moving parts. Eac

21、h channel shall have the following controls, functions, and indicators: 31-detent Gain control, with 1 dB steps over the highest 14dB of adjustment range, with accuracy within 1 dB; Green/Red LED for power/protect indication; Yellow LED signal presence indicators with thresholds 6dB and 30dB below r

22、ated power. Red LED clipping indicator for output clipping greater than 0.1%; Flashing red LED indicator for heat sink temperatures within 10C of thermal shutdown. Balanced/Unbalanced input jacks of the inch RTS, female XLR, and barrier strip screw terminal types; Speaker connectors comprising two s

23、ets of 5-way bindlng posts on -inch centers and barrier strip screw terminals. Octal socket with DC power for passive and active input accessories. 8-way microswitches for octal socket bypass, mono-bridged mode, channel cross-connection, and XLR input polarity. Each channel shall be front-removable

24、with the amplifier mounted in a rack and without dis- connecting the input/output cables. All active components, except AC power transformer, AC breaker/switch, and input/output connectors, shall be mounted on the removable channel mod- ule. Module connectors shall be flexible to withstand shocks an

25、d vibration for long term integrity. The chassis shall feature permanently attached AC cords, and a ground-lift barrier strip shall permit separation of audio ground from chassis/AC ground. The chassis shall have front and rear rack supports, and shall occupy 3 rack spaces (5.25) Chassis depth, including rear supports, shall be 17.9. Weight shall be 75 Ib. The power amplifier shall be the QSC Audio Products Model 3800. QSC AUDIO PRODUCTS INC 1926 PLACENTIA AVENUE COSTA MESA, CA 92627 714-645-2540 RadioFans.CN 收音机爱 好者资料库