Ashly MX-406 Operating Manual - Page 10

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Operating Manual -MX-406 Stereo Microphone/Line Mixer

8.3 Excessive Noise

If the noise is in the form of hiss, the problem is usually due to an input stage set for insufficient gain and then compen-

sating for it by increasing the level . Try increasing gain and reducing level . Also, check that the -20dB rear panel pad switch

is not unnecessarily enabled .

8.4 Excessive hum

This is usually caused by "ground loops" in the system wiring . A complex sound system with many sources separated

by significant distance and using several power outlets has many opportunities for this problem to occur . If possible, feed

everything in the system from one power source with a common ground . Use balanced input and output connections between

widely separated components .

If you need help, get in touch with your Ashly dealer or call an Ashly technical service representative .

9. SPECIFICATIONS

DISTORTION

THD at +4dBu output, 20Hz-20KHz . . . . . . . . . . . . . . . . . <0 .05%

THD at +12dBu output, 30Hz-10KHz . . . . . . . . . . . . . . . . <0 .05%

IMD (SMPTE) at +12dBu output . . . . . . . . . . . . . . . . . . . . <0 .05%

HUM & NOISE (20Hz-20KHz at max preamp gain)

equivalent input hum and noise . . . . . . . . . . . . . . . . . . . . <-128dBu

residual output noise

all levels at minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . <-100dBu

master levels at nominal

all channel levels at minimum . . . . . . . . . . . . . . . . . . . . . . <-90dBu

aux master at nominal

all channel aux at minimum . . . . . . . . . . . . . . . . . . . . . . . . <-90dBu

master levels and one

channel level at nominal . . . . . . . . . . . . . . . . . . . . . . . . . . <-68dBu

MAXIMUM VOLTAGE GAIN (±2dB)

MASTER

Mic/Line Input to Master Outputs . . . . . . . . . . . . . . . . . . . . . +84dB

Mic/Line Input to Mono Output, 600 ohm load . . . . . . . . . . +84dB

AUX SENDS

Mic Input to Aux Master Output, pre ch . level . . . . . . . . . . . . 84dB

Mic Input to Aux Master Output, post ch . level . . . . . . . . . . . . 97dB

Stereo Line In to Master Output . . . . . . . . . . . . . . . . . . . . . . . 27dB

FREQUENCY RESPONSE

20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+0 .5/-1 .0dB

EQUALIZATION

Bass

. . . . . . . . . . . . . . . . . . . . . . . . . ±12dB at 70Hz, shelving

Treble

. . . . . . . . . . . . . . . . . . . . . . . . . ±12dB at 8KHz, shelving

CROSSTALK

adjacent inputs, 20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . <-65dB

VU METERS

Stereo outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -21 to +6 VU

0VU = +4dBu

PEAK INDICATORS

Peak Clip indicator on each input channel and left and right outputs,

illuminates 3dB below clipping

PHANTOM POWER

+48 VDC applied to all Mic Inputs, switchable on rear panel . Maxi-

mum total current draw = 80mA . Maximum single channel current

draw = 14mA . Gradual power-up and down to eliminate "pops" .

SHIPPING WEIGHT

13 lbs . (5 .9kg)

POWER REQUIREMENTS

100-240 VAC, 50-60 Hz, 30 watt

DIMENSIONS

19" x 3 .5" x 9 .4" (483mm x 89mm x 239mm)

*unless otherwise stated, specification conditions are: 150Ω

source, maximum preamp gain, all other controls set at nomi-

nal, XLR output into 600Ω or greater.