Contacta STS K020 User manual
Scott Smith
Contacta, Inc.
616-392-3400
STS K020 Microphone and
Overhead Speaker - Installation Guide
Preliminary Manual subject to changes and additions
STS K020 Microphone and Overhead
Speaker Installation Guide
Contacta, Inc.
The purpose of this guide is to assist in the installation of the STS K020 microphone and
overhead speaker kit. The STS K020 was designed to directly replace similar systems with a
simple and easy installation. Please read through the following instructions first before
attempting installation.
If you have any questions or comments, please feel free to contact us. Our contact information
is located at the end of this document.
Components:
A31 Amplifier
STS-C100 Microphone module and silicone gaskets
Customer overhead speaker
Staff combined speaker and microphone unit
Hearing Loop aerial window label
Power Supply
Steel tubing (for wiring)
(2) 8-32 mounting studs, (6) scored 8-32 mounting screws, wire clips, hearing
loop sticker (mounting screws for outside speaker)
Required tools –Drill with 3/16 bit, Small screwdriver. #2 Philips screwdriver. ¼”
tube bender and cutter
STS K020 Components
Step 1:
Remove the STS-S27 overhead customer speaker from
the box. Using a 2.5mm Allen wrench, loosen the
screws on the side and remove the bracket from the
speaker.
Also, remove the two-terminal connector on the end
of the wire.
Step 2:
Place the bracket above or below the window in the
desired position. The speaker should be placed as
close to the customer as possible to allow for the best
clarity and system performance.
Once the bracket is in the desired location, secure it to
the wall.
Step 3:
Slide the STS-S27 speaker into the bracket. Position
the speaker to the desired angle and tighten the Allen
screws.
For optimal performance and to aid in limiting
feedback, angle the speaker out away from the glass.
Step 4:
Drill the appropriate size hole near the speaker to
feed wires through the wall to the Staff side of
the booth.
Then, feed the wires through this hole.
Step 5:
Separate the front and rear microphone plates
keeping one of the gaskets on the front
microphone assembly.
Feed the microphone cable through the window.
Thread two of the long 8-32 studs into two
opposite holes as this will help with alignment.
Use painter’s tape to temporarily secure the front
face plate to the window.
Now slip on silicone gasket for the staff side of the
window
Step 6:
Please note the microphone wire and tubing can be
positioned vertically or horizontally
Determine if you would like the tubing vertical or
horizontal and align microphone/faceplate accordingly
Cut the feeder tube to the desired length and insert the
wire through it.
Now slowly bend the tubing to the desired configuration
and secure it in place.
Step 7:
Install the staff side silicone gasket over the 8-32 studs
Make sure all mounting holes align properly with the
direction of the microphone wire and tubing
Step 8
Secure backplate with the 8-32 screws provided.
The scored screws may need to be cut/broken
down to the desired length based on the glass
thickness. Replace the alignment studs with
screws
Tighten the screws in a “star” configuration, like
you would with the lug nuts on a car’s wheels
Step 9:
Locate the A31 Driver and mounting screws.
Cut the speaker wire to the desired length, allowing
for 2”-3” of excess wire (service loop) behind the
driver. Reconnect the two-terminal connector. The
polarity of the wire is not critical. However, for
consistency, many installers connect the wire with
the black stripe to the right-most terminal (screws
upward and wires toward you).
Next, plug this connector into the “Cust Spkr” slot on
the back of the Driver.
Step 10:
Locate the loose wires from the end of the
Microphone cable. Shorten the cable to the desired
length, allowing for 2”-3” of excess wire behind the
driver. It is recommended to strip the red wire back
far enough to bend the wire into a tight loop, then
“tin” this wire. Next, strip, then solder the white
wire to the copper wire (If you do not have a
soldering iron handy, tightly twist the white wire and
copper wire together). Connect these wires to the
extra two-terminal connector provided with your STS
K020 kit. Secure the wires in the terminals as shown
with the Red wire on the right and the white/copper
wires on the left.
Plug this connector into the “Cust Mic” slots on the
back of the Driver.
Step 11:
Locate the Staff/STS Mic included in your STS K020 kit.
NOTE –Actual model may vary from the model pictured.
The connector with the Yellow and Black wires plugs
into “Staff Spkr”.
The other connector (Red, White, and Black wires)
connects to the “Staff Mic” slot on the back of the
driver.
Step 12: Install your window aerial loop or your under-the-
counter loop with the appropriate signage.
Plug the connector into the back of the driver marked,
“Loop”.
Step 13: Locate the power supply included in your
STS K020 Microphone kit. Mount this with the
included metal bracket wherever convenient. It is
recommended to install this power supply under
the counter near the A31 Driver. Connect the barrel
jack from this power supply to the connector on the
back of the driver.
Step 14: Using the included mounting screws.
Mount the A31 Driver under the counter in a
convenient location. Ensure the control panel is
facing outward for easy access to the settings. If
possible, it is recommended to leave plenty of room
behind the Driver for access to the connectors.
Then, bundle the wires with a small service loop to
conceal and protect the cables. Make sure all wires
are bundled and secured in a professional manner,
using a track, or conduit.
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