Ashly MFA-6000 manual

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Table of contents for the manual

  • Page 1

    MF A-8000 MF A-6000 Power Amplifier Operating Manual ASHL Y AUDIO INC. 847 Holt Road W ebster , NY 14580-9103 Phone: (716) 872-0010 T oll-Free: (800) 828-6308 Fax: (716) 872-0739 Internet: http://www .ashly .com/ Off On 0(Cl ip) -3 -6 -9 -12 -15 -18 -21 -2 4 -27 -30 Dual M onaura l Amplifier Channel One Output Level Li mit Thrm Protect AC Po w er 0[...]

  • Page 2

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 2 T abl e Of Contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 UNP ACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 AC POWER REQUIREMENTS . . . .[...]

  • Page 3

    3 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier Caut ion: This power amplifier can produce danger ous output voltage levels, high power levels, and high sound pr essure levels in loudspeakers. In order to minimize the risk of injur y , damage, or hearing loss, please r ead the entire owner's manual befor e connecting to a sound sy[...]

  • Page 4

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 4 1. INTRODUCTION The MF A Series amplifiers achieve the very high ener gy levels used in today’ s professional sound systems, carefully maintaining control and accuracy while deliv- ering high power to modern loudspeaker configurations. The MF A 8000 (MF A 6000) will deliver 1200 W atts [...]

  • Page 5

    5 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier peaking at the clipping level, the following AC line cur- rent capacities are recommended for system design pur- poses: Load MF A-6000 MF A-8000 Idle 1 Amp 1.2 Amps 8 Ω × 2 7.5 Amps 10 Amps 4 Ω × 2 10 Amps 15 Amps 2 Ω × 2 15 Amps 20 Amps T able 3.1: Recommended AC line current ca[...]

  • Page 6

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 6 6. FRONT P ANEL FEA TURES 6.1 Power Switch When the unit is switched on there is a 2 second delay , during which time the PROTECT and LIMIT cir- cuits will activate. The load is disconnected during this power -up sequence, and the input signal is attenuated. When turning of f the amplifie[...]

  • Page 7

    7 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 6.5 Thermal Indicator This yellow LED indicates that the internal tem- perature of the amplifier is too high in one or more places. Intensity of the LED is proportional to temperature above normal. Note that if the thermal LED occasionally comes on dimly , this is not considered excessive[...]

  • Page 8

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 8 7. REAR P ANEL FEA TURES 7.1 Inputs The standard input panel of the MF A series amps is equipped with balanced 1/4" tip-ring-sleeve (TRS) phone jacks, balanced XLR jacks, and balanced screw- terminal inputs. The three types of connectors are inter- nally wired in parallel and may be [...]

  • Page 9

    9 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier Input Gr ound The CHASSIS GROUND terminal is internally connected to the chassis, the AC earth ground, and the power amplifier ’ s signal ground. The INPUT GROUND terminal is tied to the XLR pin 1 and the 1/4" jack sleeve. It is recommended that the input and chassis ground ter- mi[...]

  • Page 10

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 10 7.6 Speaker Outputs - Speakon Connectors Neutrik Speakon connectors are provided to con- nect with the Neutrik NL4FC 4-conductor plug. For the channel 1 and 2 Speakon connectors, the following pin assignment is used: Pin 1+ = speaker hot Pin 1- = speaker ground The third Speakon connecto[...]

  • Page 11

    11 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier Limiter In/Out Le v el Ch a nnel 2 (+) (-) In p u t G roun d C ha ssi s Ground (-) (+) Le v el Limiter In/Out Chann el 1 ( M ono ) CL-2 POW ERCARD Input Optio n Stereo Li mi ter 10 0 1 2 3 4 5 6 9 01 0 1 4 5 6 7 8 9 L im it L im it Ch .2 Limiter Thresho l d (dB) Ch .1 Limiter Thresho l d[...]

  • Page 12

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 12 9. TYPICAL APPLICA TIONS 9.1 Stereo Operation 9.2 Parallel Mono Operation (Both switches out, both inputs used, both level controls used, both outputs used) (Parallel mono switch in, channel 1 input used, both level controls used, both outputs used)[...]

  • Page 13

    13 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier Sophisticated power amp monitoring circuits de- tect any abnormal conditions which may cause damage to the amplifier or speakers. A highly accurate clip de- tector illuminates the CLIP LED at the onset of clipping. Further increases in signal level will activate a limiter circuit which p[...]

  • Page 14

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 14 1 1 . TROUBLESHOOTING TIPS 1 1.1 No Audio Output Power switch not lit: Line fuse is blown or power outlet is dead. Power switch is lit but no LEDs lit: Ther e is no input signal applied or input level contr ols ar e off. Note: In parallel mono mode, be sur e that only one signal sour ce [...]

  • Page 15

    15 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 12. DIMENSIONS[...]

  • Page 16

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 16 13. SPECIFICA TIONS 13.1 Output Power Per channel, both channels driven at 1KHz, < .1% THD, 120V AC 60Hz MF A-8000 MF A-6000 8 Ω : 750W 525W 4 Ω : 1200W 800W 2 Ω : 1500W 900W bridged mono mode 8 Ω : 2400W 1600W 4 Ω : 3000W 1800W ( ± 1dB) per channel from 20Hz to 12KHz*, <[...]

  • Page 17

    17 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 14. W ARRANTY POLICY W e thank you for your expression of confidence in Ashly products. The unit you have just purchased is pro- tected by a limited five year warranty . T o establish the warranty , you must first complete and mail the warranty card attached to your product. Fill out the[...]

  • Page 18

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier 18[...]

  • Page 19

    19 Operating Manual - MF A-8000 and MF A-6000 Power Amplifier[...]

  • Page 20

    Operating Manual - MF A-8000 and MF A-6000 Power Amplifier ASHL Y AUDIO INC. 847 Holt Road W ebster , NY 14580-9103 Phone: (716) 872-0010 Fax: (716) 872-0739 T oll Free (800) 828-6308 Internet: http://www .ashly .com/  1997 by Ashly Audio Corporation. All rights reser ved worldwide. MF A Rev 2 Printed in USA 8/97[...]