Set to “OFF” if:
You will NOT turn zones on and off using the zone buttons
AND
You are utilizing impedance matching volume controls to adjust the overall system impedanc
e
Note: it is ok to daisy-chain a second speaker selector using the connectors labeled “OUTPUT” when the protection switch is “OFF” and you are utilizing a planned system
of impedance matching. Connecting the “OUTPUT” of one speaker selector to the “INPUT” of a second speaker selector creates a “parallel” connection.
Warranty
All HTD electronics carry a two-year parts and labor warranty. Warranty registration occurred automatically
at the time your order was placed. There is no need to complete or mail in additional paperwork.
Setting the Protection Circuit
Set to “ON” if:
You plan to turn zones on and off using the zone buttons
AND/OR
You are NOT using impedance matching volume controls
Note: do NOT daisy-chain multiple speaker selectors (using the connectors “OUTPUT”) when setting the protection switch to “ON”
PROTECTION
CIRCUIT
SWITCH
OFF ON
If you have any questions, we can be reached at...
info@htd.com or toll free 1-866-HTD-AUDIO (483-2834)
Stereo Amplifier
Speaker Selector
Impedance
Match X4
Speaker Outputs
R
L
+
-
-
+
Impedance
Match X4
Impedance
Match X4
Zone 2
Zone 1
Zone 3
Impedance Matching
Stereo Volume Control
Stereo Amplifier
Speaker Selector
*
Stereo Volume Control
Speaker Outputs
R
L
+
-
-
+
Zone 2
Zone 1
Zone 3
**
Stereo Volume Control
*
Stereo Volume Control
If using impedance matching
stereo volume controls:
*
= set to X1
**
= set to X2
2nd pair only pos-
sible with impedance
matching stereo
volume control set
to X2
Impedance Matching
Stereo Volume Control
Impedance Matching
Stereo Volume Control
PROTECTION
CIRCUIT
SWITCH
OFF ON
