Ashly MFA-8000 User manual

MFA-8000
The power amplifier, being of two channels, shall deliver a minimum
power of 750 watts RMS per channel into 8 ohm loads and 1200 watts
RMS per channel into 4 ohm loads, or 1500 watts per channel into 2 ohm
loads with both channels operating. 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 mis-
matched 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 paral-
lel 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.
TECHNICAL NOTES & SPECIFICATIONS
ARCHITECTS SPECIFICATIONS
MFA-8000 Bi-Polar Amplifier
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

Ashly Audio Inc., 847 Holt Road, Webster, NY 14580-9103, Toll Free [phone], Telephone [phone], FAX [phone]
Internet: http://www.ashly.com, email: [email protected]
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.
Applications:
Churches, Studios, Concerts, Dance/Night Clubs, PA Systems, Auditoriums, Lecture Halls, Sports Stadiums, Outdoor Festivals
General Specifications MFA-8000
OUTPUT POWER
(Per Channel, Both Driven at, 1KHz, 0.1% THD)
8 ohms: 750 Watts RMS
4 ohm: 1200 Watts RMS
2 ohm: 1500 Watts RMS
(BRIDGED MONO MODE)
8 ohms: 2400 Watts RMS
4 ohm: 3000 Watts RMS
(Per Channel from 20Hz to 12KHz*, <.25% THD)
8 ohm: 720 Watts RMS
4 ohm: 1100 Watts RMS
Frequency Response: +/-0.2dB (20Hz - 20KHz)
+/-3dB (8Hz - 100KHz)
Total Harmonic Distortion: 0.025% (720 Watts into 8 ohms,
20Hz - 1KHz increasing to <.25% at
12KHz
Output Hum and Noise: -105dB from full output (20Hz -
20KHz unweighted)
Damping Factor: >200, 8 ohm, 20Hz - 1KHz
Crosstalk -90dB (20Hz - 1KHz)
Input Sensitivity: 1 Vrms for full output
Voltage Gain: 80X (38dB)
Input Impedance: 20K ohm balanced
Amplifier Protection: Fuseless short-circuit protection,
ultrasonic and RF protection,
advanced thermal protection
Load Protection: Turn-on delay with level ramp-up,
DC fault protection, ultrasonic limit
ing, clip limiting
Cooling: Forced air with 2-speed fan
Indicators: 11 segment level meters with true
clipping red LED, Green Limit LED
indicates when electronic attenuator
is active. Yellow Therm LED
indicates a higher than normal oper
ating temperature. Red Protect LED
indicates when output relay is open.
Power Requirement: 110-125VAC, 50-60Hz
(240V Available)
1.2 amps idle current draw,
12 amps maximum for typical stereo
operation into 4 ohm loads
Size: 19L x 5.25H x 16.5D
Shipping Weight: 68 lbs
*Protection circuits will prevent full output voltages above 12KHz
Specification conditions are:120VAC mains at 60Hz, 25° C
Rear Panel MFA-8000