Specifications

10
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
INPUT IMPEDANCE
Mic input (balanced)                             12k Ohm
Line input (balanced)                              20k Ohm
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
MAXIMUM INPUT LEVEL
Mic input (with pad)                             +223dBu
Line input                                       +23dBu
MAXIMUM OUTPUT LEVEL
Transformer output    +242dBu @600 Ohm (+267dBu no load)
Line output                        +23dBu, RCA +135dBu
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"
WEIGHT
Unit weight                                11 lbs (50kg)
Shipping weight                            133 lbs (61kg)
DIMENSIONS
19" x 35" x 94" (483mm x 89mm x 239mm)
POWER REQUIREMENTS
100-240 VAC, 50-60 Hz, 30 watt
*unless otherwise stated, specication conditions are: 150Ω
source, maximum preamp gain, all other controls set at nomi-
nal, XLR output into 600Ω or greater.