Before connecting other equipment to Powered mixer, check the impedance and level of both.
If the impedances and levels do not match, mixing will be very difficult and the S/N ratio will
also be adversely affected.
Each input channel of the MX-601 is provided with a TRIM control. Thorough understanding of
the function of a TRIM control will make mixing easier.
Trim Control
Input
HEAD AMP
Output
The function of the TRIM control is to control the
negative feedback volume of the head-amp so
that the gain of the head-amp can also be
changed. Because of this, enough dynamic
range, even for high level signals is ensured.
Also, the S/N ratio will be better by decreasing
the gain of the head-amp.
For example, a keyboard, a musical instrument and a dynamic microphone with output levels of
-10dBm, -20dBm and -40dBm respectively are connected to the MX-601.
If the trim control is set as shown in the left fi-
gure, the input level controls can be set to the
same position.
The input level controls are used in general be-
tween -5 and -15.
The peak indicator LED illuminates if the head
amplifier or equalizer is clipping. The gain of the
head-amplifier must be decreased by turning the
trim control counterclockwise.
Key Board in -10dBm level
Musical Instrument in -20dBm level
Dynamic Microphone in -40dBm level
Fault Protection Table
Fault
Excessive current due to
overloads
Short circuits
(less than 0.4-ohm)
Temperature rise of heat
sink
(more than 105°C)
DC drift
Protection
Current limiter activates at
less than 1 ohm.
Current limiter activates,
input signal is lowered,
unit shuts down.
Input signal is lowered
Unit shuts down
Input signal is lowered
Unit shuts down.
Indication
Compressor LED
illuminates
Amp protection LED
illuminates
Amp protection LED
illuminates.
Amp protection
LED illuminates
Action
Remove excessive lords.
Minimum speaker loads 2
ohms
Check speaker lines/
systems for shorts
Check for adequate
ventilation.
Refer to qualified service
personnel.
Restoration
Automatic restoration
after normal loads are
obtained
Turn off power switch
Turn on into operational
loads.
Automatic restoration
after temperature lowers
(to 75°C - 95°C)
Automatic restoration
after normal bias is
regained
— 7 —
How to get a good mix
All manuals and user guides at all-guides.com
