Owner's Manual

Example-2: Factory Radio (2-in/4-out) with AUX
Note: For systems with a main speaker level source and an auxiliary source, select system Type-2 at the multi-function
remote. This provides master volume control for AUX input as well as independent CH3/4 level adjustment for both
sources. In this 5-channel system example, note that the link4’s CH1/2 output needs to be split with y-adapters for the
amplifier’s front/rear channels (unless it has an input select switch) in order to reserve CH3/4 for sub level control.
Adjust for any desired gain difference between front and rear at the amplifier.
Example-4: Fixed Level Main Source (2-in/4-out) with AUX
Notes:
Ÿ For factory amplified systems with non-defeatable effects such as volume dependent EQ or where the only clean
signal available is a fixed level (e.g. volume control via CAN bus), select system Type-4 at the multi-function remote.
This enables all remote functions and sets knob priority to master volume control for both Main and AUX inputs.
Independent CH3/4 level mode is also selectable for each source.
Ÿ Some fixed level or before-the-amp factory signals may actually be low level (e.g. less than 5Vrms) and not perform
well when loaded down to speaker level impedances. To bypass the link4’s built-in loading, remove the internal
jumpers (labeled LOAD) located near the input terminal for each channel as needed.
CH3/4
CH1/2
+12V
GND
Type-4
Ÿ Main Vol
Ÿ Main CH3/4
Ÿ AUX Vol
Ÿ AUX CH3/4
REM
OUT
AUX IN
RLC
6
Note: For stand-alone systems where only the AUX input is used, select system Type-3 at the multi-function remote.
This disables the remote’s source select function and sets knob priority to master volume control for AUX input. In this
front/rear full-range system example, CH3/4 level mode can be used to adjust rear level as needed. Portable devices
such as smartphones or MP3 players typically have an output voltage of 1Vrms or less, so it is recommended to maximize
the device’s unclipped output level. Adjust AUX gain accordingly and use the remote as the system’s master volume.
Example-3: Stand-Alone AUX
CH3/4
CH1/2
+12V
GND
REM OUT
AUX IN
RLC
Type-2
Ÿ Main CH3/4
Ÿ AUX Vol
Ÿ AUX CH3/4
+12V
GND
Type-3
Ÿ AUX Vol
Ÿ AUX CH3/4
REM OUT
AUX IN
RLC
CH3/4
CH1/2
CH3/4 SPK IN
CH3/4
SPK IN