Mustang M/8M, M2508/D, M100/SD, M1008/D, M250/SD MACRO range installation manual. Issue

MACRO range installation manual. Issue 6

GENERAL SPECIFICATIONS

MIXER AMPLIFIERS

Input channels

Input channel level & response Treble & Bass adjustment Power output (Watts RMS contin.) Current sinks

Auxiliary DC output

Mixer facility level

Power amplifier input

Power amplifier power freq. resp.

Loudspeaker matching

AC mains supply input

24V DC supply input (22-28V)

DC quiescent consumption (approx)

SLAVE AMPLIFIERS

Power output (Watts RMS contin.) Audio input level

Power amplifier power freq. resp.

Loudspeaker matching

AC mains supply input

24V DC supply input (22-28V)

DC Quiescent consumption (approx)

MIXERS

Input channels

Input level & response

Treble & Bass adjustment

Current sinks

Auxiliary DC output

Audio output level

AC mains input

24V DC supply input (22-28V)

DC quiescent consumption (approx)

M1008		M2508
M1008/D		M2508/D
8		8
dependent upon input modules fitted
± 12dB @ 100Hz & 10kHz ref.1kHz
100		250
250mA maximum, each channel module
nominally +24V. 1A fused.
775mV nominal. 0dBV
775mV , 0dBV @ 10k ohms
-3dB @ 20Hz & 20kHz ref. 1kHz, low imp
-3dB @ 20Hz & 15kHz ref. 1kHz, 100V
100V/50V line balanced
240V 50-60Hz +5% -15%		18 Amp
6 Amp
350mA		350mA
M100		M250
M100/D		M250/D
100		250
775mV, 0dBV @ 10k ohms
-3dB @ 20Hz & 20kHz ref. 1kHz, low imp
-3dB @ 20Hz & 15kHz ref. 1kHz, 100V
100V/50V line balanced
240V 50-60Hz +5% -15%		18 Amp
6 Amp
250mA		250mA
M8M		M8M/D
8		8
dependent upon input modules fitted
± 12dB @ 100Hz & 10kHz ref.1kHz
250mA maximum, each channel module
nominally +24V , fused 1A
775mV nominal. 0dBV
240V 50-60Hz +5% -15%
ó	250mA (module dependent)
ó	150mA

FRONT PANEL CONTROLS & INDICATORS

By design, user accessible controls are kept to a minimum to avoid inadvertent maladjustment which could render the system ineffective.

Each input channel of a MACRO mixer or mixer-amplifier may be adjusted for gain by using the front panel controls. Should the commissioning engineer deem it prudent, he may remove any of the complete control knob/spindle assemblies, after adjustment is complete, simply by pulling the knob. The resulting holes may then be blanked off using the blanking plugs supplied. The controls may be refitted at any time subsequently. Slave amplifiers to standard specification are not fitted with a front gain control. An illuminated power switch controls AC power input (and if applicable, DC power input simultaneously).

A series of LED indicators provides a simple means of assuring the user of correct amplifier operation. A 10 segment ladder gives an indication of output level expressed in decibels - i.e. dB relative to maximum output amplitude. Under normal programme conditions this will fluctuate between the extreme left and extreme right segments in accordance with the amplitude of the programme at any particular instant. No segment is illuminated when the amplifier output is zero. If the illuminated segment is predominantly to the extreme right (maximum) then it is likely that the amplifier is being over-driven and that the resulting sound will be distorted on peaks. Reduce the corresponding front input gain control accordingly.

A fast attack/slow decay circuit is used to drive the display so that amplitude peaks are recognised.

Two further LEDs indicate the status of the power supply in use, and of the power amplifier module where appropriate. For further details see page 19.

TONE CONTROL & MASTER GAIN ADJUSTMENT

Tone control facilities are provided on the line driver module, type TB.6 which is located at second right, on a mixer or mixer amplifier when viewed from the front. Two trimmer potentiometers are located at the bottom of the module, just above the edge connection tabs. Viewed from the front, the nearest is the bass adjustment and the furthest is the treble. Each controls a cut & lift correction circuit with the central position of the rotator giving nominally flat response. At the extremities of rotation, the corrections are ± 12dB at 100Hz and 10kHz respectively. Rotate controls clockwise to increase the gain at bass or treble frequencies. On

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