IM1 M/S INSERT MASTER
IM1 Preliminary Manual 10.2017
www.zaehl.com
Page 4 of 7
OPERATION
I/O Stages
•
Dedicated INPUT and OUTPUT level setting
−
GAIN ±10 dB
−
L/R BALANCE ±2.5dB
•
Dedicated INPUT and OUTPUT level metering
−
SIGNAL (LED green): level present
−
O/L (LED red): overload warning reading multi-
ple points in the signal chain
•
BYPASS switch
INSERT
•
INSERT on/off switch inserts the connected sig-
nal processors into the signal chain. (An internal
jumper can be set to mute INSERT SEND when
INSERT off, or to keep INSERT SEND always active,
jumper setting see below.)
•
MID/SIDE Switch encodes the INSERT SEND ste-
reo signal from left/right to MID/SIDE and de-
codes the RETURN signal back from MID/SIDE in-
to left/right. The normally left channel carries the
MID signal (sum L+R) and the normally right
channel the SIDE signal (difference L-R). Individu-
al processing of MID and SIDE signals can be a
powerful technique to be used in mastering, in a
mix sum or in creative sound processing.
•
SEND BOOST control adds gain of up to +20 dB to the INSERT SEND output. This allows you to drive your out-
board gear to where it sounds best - especially useful for vintage/tube/transformer equipment.
•
Z switch offers selection of impedance on INSERT RETURN: LINE (>20 k
Ω
), 2 k
Ω
or 600
Ω
. Impedance matching
affects the sound and is in some cases essential. With this switch you will easily find the best match.
•
DRY/WET RETURN RATIO control balances between original signal (DRY) and processed signal (WET) at IN-
SERT RETURN - also called parallel processing. This can be used for example to add a small amount of heavy
processing while maintaining the overall integrity of the original signal - especially transients.
•
MONITORING matrix with four switches allows you to check what is being sent to your inserted equipment
and what is coming back - especially helpful in MID/SIDE mode. Push any button to set the unit to MONITOR-
ING mode. You can select INSERT SEND or RETURN for L/MID channel and for R/SIDE channel individually.
LEDs next to each switch indicate what is being monitored. Push again to return to normal operation. Monitor
signal is send to the main outputs.
