Table Of Contents; Ld-1A Signal Flow Diagram - Meyer Sound LD-1A Operating Instructions Manual

LD-1A Signal Flow Diagram................................ 3
Introduction ......................................................... 4
Audio Input ......................................................... 4
AC Power ............................................................. 4
Main Channels 1 and 2 ........................................ 5
Common mode:
425 kHz low-pass
Normal mode:
142 kHz low-pass
XLR
3
Input
fc
2
10 kW
RF & ESD
1
FILTER
Earth and Chassis GND
10 W on
power supply board
Full range
Low-cut
160Hz
Q=0.8
-12 dB/oct
Channels 1& 2 only
80Hz
Elliptical
65Hz
Q=0.9
-12 dB/oct
Contents

LD-1A Signal Flow Diagram

SIGNAL
& CLIP
DETECTOR
80 dB CMRR
Master
Laser Trimmed
Level
DIFF
AMP
-12 to +6 dB
Audio GND
Mid-Hi
Level
Flat
ArrayEQ
-12 to +6 dB
Ð6 dB at
220Hz;
0.6 octave
bandwidth
DS-2
Level DS-2 Mute
Switch
Full range
Crossover
-12 to +6 dB
DS-2 & Sub
Crossover
Sub
Level
Sub Mute
Switch
Full range
Crossover
-12 to +6 dB
Auxiliary Channels 3-8 ............................................ 6
Example Configurations .......................................... 7
Safety Summary ..................................................... 9
Specifications ....................................................... 10
GRN
RED
LED
MUTE SWITCHES
Master Mute
Switch
Channels 1& 2
only
High Current
Mid-Hi Mute
Switch
DIFFERENTIAL
DRIVER
High Current
Polarity
normal
DIFFERENTIAL
DRIVER
Polarity
inverted
High Current
Polarity
normal
DIFFERENTIAL
DRIVER
Polarity
inverted
XLR
PWR-ON RF 3
PWR-OFF BLOCK
MUTE
2
1
Earth and Chassis GND
XLR
PWR-ON RF 3
PWR-OFF BLOCK
DS-2 or
MUTE 2
2nd Sub
Output
1
Earth and Chassis GND
XLR
PWR-ON RF 3
PWR-OFF BLOCK
MUTE 2
1
Earth and Chassis GND
Mid-Hi
Output
Sub
Output
3