Évaluations - 3, GPA: 4.3
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When switched into bridged-mono mode, the amplifier it shall deliver at least 2400 watts into an 8 ohm load. The amplifier shall be immune to damage from shorted, open, or mismatched loads. The amplifier shall have a gain of 38 dB per channel and an input sensitivity of 1 Volt RMS for full rated output. Frequency response shall be 20Hz to 20kHz +/- .2dB. It shall be stable into any load, including pure capacitors and inductors. Hum and noise shall be at least 105dB below full output and total harmonic distortion shall be less than .025% below 1KHz. The amplifier shall have rear panel switching for parallel mono and bridging modes and rear mounted level controls. The inputs shall be of balanced bridging type with female XLR connectors as well as 1/4” phone jacks and barrier strips. A three-color LED type indicator shall be employed to show the power level of each channel and two speed forced air cooling shall be used. Each channel shall have a PROTECT LED which indicates an open relay due to short-circuit, ultrasonic, DC, or turn-on delay. A LIMIT LED shall indicate any limiting action and a THERMAL LED shall indicate excessive temperature. The power output devices shall be complementary bipolar transistors. The amplifier shall weigh 61 lbs net and mount in a standard 19 inch rack using three spaces (5.25” high). The power requirement shall be 110-125VAC, 50-60-Hz. The power amplifier shall be an Ashly MFA-8000. Features: • Turn-on Delay • 5-Year Worry-Free Warranty • Bipolar Output Devices • Class-A Full Complementary Front End • Modular Construction • XLR, 1/4", and Barrier Strip inputs • Stereo, Parallel Mono & Bridging Modes • LED Level meters and Status LEDs • Stable Into Any Load • Self Protecting Under Virtually All Conditions • Input Transformers Optionally Available • PowerCard Input Option Ready • Speakon and Binding Post Outputs • High-efficiency 3-Step Power Supply General Specifications MFA-8000 Amplifier Protection: Fuseless short-circuit protection, OUTPUT POWER ultrasonic and RF protection, (Per Channel, Both Driven at, 1KHz, 0.1% THD) advanced thermal protection 8 ohms: 750 Watts RMS Load Protection: Turn-on delay with level ramp-up, 4 ohm: 1200 Watts RMS DC fault protection, ultrasonic limit 2 ohm: 1500 Watts RMS ing, clip limiting Cooling: Forced air with 2-speed fan (BRIDGED MONO MODE) Indicators: 11 segment level meters with true 8 ohms: 2400 Watts RMS clipping red LED, Green Limit LED 4 ohm: 3000 Watts RMS indicates when electronic attenuator is active. Yellow Therm LED (Per Channel from 20Hz to 12KHz*, <.25% THD) indicates a higher than normal oper 8 ohm: 720 Watts RMS ating temperature. Red Protect LED 4 ohm: 1100 Watts RMS indicates when output relay is open. Frequency Response: +/-0.2dB (20Hz - 20KHz) Power Requirement: 110-125VAC, 50-60Hz +/-3dB (8Hz - 100KHz) (240V Available) Total Harmonic Distortion: 0.025% (720 Watts into 8 ohms, 1.2 amps idle current draw, 20 Hz - 1KHz increasing to <.25% at 12 amps maximum for typical stereo 12KHz operation into 4 ohm loads Output Hum and Noise: -105dB from full output (20Hz - Size: 19”L x 5.25”H x 16.5”D 20KHz unweighted) Shipping Weight: 68 lbs Damping Factor: >200, 8 ohm, 20Hz - 1KHz Crosstalk -90dB (20Hz - 1KHz) *Protection circuits will prevent full output voltages above 12KHz Input Sensitivity: 1 Vrms for full output Voltage Gain: 80X (38dB) Specification conditions are:120VAC mains at 60Hz, 25° C Input Impedance: 20K ohm balanced Rear Panel MFA-8000 Applications: Churches, Studios, Concerts, Dance/Night Clubs, PA Systems, Auditoriums, Lecture Halls, Sports Stadiums, Outdoor Festivals Ashly manufactures a complete and comprehensive line of Graphic and Parametric Equalizers, Electronic Crossovers, Power Amplifiers, Compressor-Limiters, Mixers, and Amplifier Input Options. Please call, write or visit our web site for information on any of these Ashly Products. Ashly Audio Inc., 847 Holt Road, Webster, NY 14580-9103, Toll Free (800) 828-6308, Telephone (585) 872-0010, FAX (585) 872-0739 Internet: email: info@ashly.com...