3
West Mountain Radio
Operating Manual
SPKR OUT:
This 1/8” jack connects to a low-impedance external speaker. The
CLRdsp uses a bridge amp type output which means it is important that your
external speaker is not grounded. The tip is positive and the sleeve is negative.
Use one of the 6ft. stereo cables provided to connect to the external speaker.
Recommended for a 4 or 8-ohm external speaker. Do not use a powered
external speaker with this jack as these typically have grounded sleeves.
Power Jack:
The CLRdsp comes with a 6ft. power cable. One end is a 2.1 mm
power plug (tip hot) and the other is a pair of Powerpole
®
connectors. RED is
for PLUS 13.8 VDC and BLACK is for Ground. If using other connectors, just
remove the Powerpole
®
and connect the white striped wire to PLUS 13.8 VDC
and the other wire to ground. The CLRdsp is protected from a reverse polarity
power connection. A small 1-amp 12 or 15-volt, wall mount power supply (wall
wart) may be used to power the CLRdsp. The plug required is 5mm OD with a
2.1 mm pin, and the pin is positive. West Mountain Radio carries an appropriate
supply for 117 VAC.
Front Panel
Headphone Jack:
The front panel headphone jack can work with mono or
stereo headphones. A jumper (J8) is provided on the main circuit board to
select which type of headphones will be used with the CLRdsp. Remove the
case screws carefully and locate jumper J8.
Jumper J8 ON: Stereo headphones (audio fed to both tip and ring)
Jumper J8 OFF: Mono headphones (audio on the tip only)
Warning: Do not connect shield contact on HDPH or Spkr Out to DC ground.
The high level audio works fine with modern 8 to 600 ohm headphones.
Plugging in headphones will mute the external speaker.
Important:
The headphone jack should only be used with headphones. Do
not make a connection here that would cause the sleeve to be grounded, for
example a connection to external equipment.
Controls
Volume Control
: The desired volume level from the external speaker may be
controlled with the volume knob on the front of the CLRdsp unit. Headphone
volume will also be affected. Adjust the radio’s volume control and this control
to achieve the desired audio output.
Tone Control:
Adjust the tone control for desired level of bass/treble response.
Filter Control:
Adjusts the amount of active DSP filtering.
