2958
2952
2953
2957
How to Install and Use
DirectSelect
™
Volume Control /Headphone Modules
The Model 2958 adds SilenTouch
™
switch interval muting and volume control capability to DirectSelect
™
Series switching systems or anywhere these functions are needed. SilenTouch
™
is Audio Authority’s exclusive
process for eliminating switching noises and protecting the relay contacts in audio switching systems. A
digital rotary encoder is used for volume control, eliminating potentiometer noise and protecting against
damage due to over-rotation. Optionally, up/down push-buttons can be used to control volume instead of
the rotary control.
Model 2959 is similar the 2958 but adds eight stereo headphone outputs, making it useful for headphone
demonstrations with volume control.
By adding just a 12-volt power pack (Audio Authority part number 805-021), either version can be used as a
stand-alone volume control in any kind of audio system having RCA or 3.5mm signal jacks. In volume control
applications that demand a more comprehensive set of features, such as wider volume control range or
adjustable limits, use the Model 988CP0 or 988CP3.
Installation
1. If the volume control knob is not needed, omit this step. The volume
control can be mounted on any panel surface up to
3
⁄
4
inch thick. Determine
where the volume knob is to be located and use this template to cut out the
panel. First drill the
1
⁄
2
“ hole, then drill the 1
1
⁄
4
“
hole
5
⁄
8
“ to the right of the
first hole. Mount the volume control sub-board to the back of the panel
using two screws according to the table below. Install the spinner knob on
the volume control shaft using the hex key provided. Use two strips of
paper to space the knob out for panel clearance. Plug the volume control
cable into the 6-pin header on the main board.
Panel Thickness
Fastener
Drill
Notes
Up to 1/4 inch
6-32 machine screw and nut
5/32"
Reverse the two plastic spacers
3/8 to 5/8 inch
#6 sheet metal or drywall screw
7/64"
Use the plastic spacers as-shipped
3/4 inch
#6 drywall screw
7/64"
Remove the two plastic spacers
2. Mount the main board close to the rest of the system using the supplied screws.
3. In switching systems, plug the source output
bus into the RCA or stereo mini-phone Bus Input
jacks. Plug the amplifier input bus into the 2958/
2959 Bus Output jacks. Connect the System Bus
of each switching system product group to a
different System Bus port on the 2958 or 2959.
Sources, amps/receivers and speakers are
examples of DirectSelect
™
product groups. Do
not cut any of the yellow interlock wires in the
bus harnesses when using the 2958 or 2959. See
the DirectSelect
™
instruction manual for further
switching system application details.
5/8”
1
2
1
⁄
2
” hole
1-
1
⁄
4
” hole
Sources
Volume
Receivers
Speakers
The location of a 2958 in the signal flow of
a stereo DirectSelect
™
switching system.
System Bus