4
UNPACKING AND RECORD KEEPING
Save the box and its interior packing material in a
dry, protected space. The box and packing are vitally
important to protect the amplifier should it need to be
transported for service or relocation in the future.
The information below is critically important for warranty
claims, advanced troubleshooting, parts inquiries and
insurance replacement. The amplifier’s serial number is
located on a label on the back panel below a bar code. In
addition, please keep a copy of your dealer’s sales invoice
listing the amplifier with the serial number in a secure
place. These are crucial time-saving steps for the future, if
a warranty claim becomes necessary.
S/N: ___________________________________________
DATE OF SALE:__________________________________
DEALER NAME:_________________________________
CONTACT INFO:_________________________________
STACKING MULTIPLE AMPLIFIERS
Multiple amplifiers can be directly stacked with the feet
removed for use in low to moderate output applications.
For high output applications, provide at least 1U space
(1.75”/44.4mm) between amplifiers for increased
ventilation.
OPERATING THE AMPLIFIER
The 16-50 and 8-50 were designed to be ultra-simple
to operate once installed. When the ‘Sense’ mode is set
to ‘Voltage’ and a 3-30V DC voltage is applied, the unit
will produce sound after approximately one second.
When 3-30V DC is removed, the amplifier will enter a low
power standby state after ten seconds. When the ‘Sense’
mode is set to ‘Audio’ and an audio input above 1.5mV is
detected, the unit will produce sound after approximately
1. Ensure the 16-50 or 8-50 is in the OFF state. The rear
panel Power Switch should be in the down position.
2. Decide on the appropriate Power Sensing Mode:
Voltage, Audio Signals or the “always on” OFF position
such as for passing paging or doorbell chimes.
3. Set the Sense DIP switch accordingly.
4. If using the voltage trigger feature, connect a two-
conductor wire from the 12 volt output of a zone
preamp or DC power supply into the ‘V Trigger’
inputs on the amplifier.
5. Connect a pair of RCA cables from the single source
into the left and right Bus A inputs on the amplifier.
6. Set the channel Input Assignment DIP switches to
Bus A.
7. Connect speaker wire from the speakers to their
dedicated Speaker Output Block Connector.
8. If the AC cord is disconnected, then reconnect it.
9. Push the power switch up to the ON position.
10. With the volume on the source turned down to a low,
speaker friendly level, activate the amplifier to play
music. If you do not hear any sound, refer to the ‘No
Audio’ section of the Troubleshooting chapter of this
manual.
11. Adjust volume output with Zone Level controls.
12. Follow the steps in the chapter entitled, ‘Protecting
Speakers from Damage’.
Application Two
Four analog audio sources, such as four music streamers
or four line-level outputs of a multi-zone preamp into the
local (direct) inputs.
1. Ensure the amplifier is in the OFF state. The rear
panel power switch should be in the down position.
2. Decide on the appropriate Power Sensing Mode:
Voltage, Audio Signals or the ‘always on’ OFF position
(such as for the passing paging or doorbell chimes).
ZONE 1
ZONE 2
ZONE 4
ZONE 3
Application One
One Analog audio source, such as a music streamer, into
the Bus A inputs for internal distribution to all eight (16-
50) or four (8-50) stereo Zone outputs.
Figure 1: Single Audio Source
OFF
3. Set the Sense DIP switch accordingly.
4. If using the voltage trigger feature, connect a two-
conductor wire from the 12 volt output of a zone
preamp or DC power supply into the ‘V Trigger’
inputs on the amplifier.
5. Connect a pair of RCA cables from each stereo
source into their dedicated local source inputs.
6. Connect 14/4 speaker wire from the remote zones to
their dedicated Speaker Output Block Connector.
7. If the AC cord is disconnected, then reconnect it.
8. Push the power rocker switch up to the ON position.
9. With the source volume turned down to a low,
speaker friendly level, turn the amplifier on and play
music. If you do not hear any sound, refer to the ‘No
Audio’ section of the Troubleshooting chapter.
10. Adjust volume output with Zone Level control.
11. Follow the steps in the chapter entitled, ‘Protecting
Speakers from Damage.’
