Speaker Selectors
Models SSW-4 and SSW-6
User Manual
(SSW-4)
(SSW-6)
Table of Contents
Important Safety Precautions............................................................. 2
What’s Included...................................................................................2
Introduction..........................................................................................3
Front Panel...........................................................................................3
Rear Panel ............................................................................................3
Typical Hook up...................................................................................4
Installation Tips...................................................................................4
Installation............................................................................................ 4
Operation.............................................................................................. 5
Trouble Shooting .................................................................................7
Technical Specifications......................................................................7
Limited Warranty................................................................................ 8
Important Safety Precautions
When using this product, basic safety precautions should always be followed to reduce
the risk of fire and electric shock, including the following:
Read and understand all instructions.
Follow all warnings and instructions marked on this product.
Do not use liquid or aerosol cleaners. Use a damp cloth for cleaning.
To prevent fire or shock hazard, do not expose this product to rain or moisture. Do
not use near a bath tub, wash bowl, sink, or laundry tub; do not use in a wet
basement or in a swimming pool.
To avoid electrical shock, do not open the case of this product.
The unit should be situated away from heat sources such as radiators, stoves, etc.
What’s Included
1 - SSW Speaker Selector
1 - Sheet of labels
1 - This instruction manual
Date Purchased: ___________, Model: ___________
©1999 by Sima Products Corp.
All rights reserved. No part of this publication may be reproduced or transmitted
in any form or by any means without prior written permission from Sima
Products Corp.
Page 2
Introduction
The Sima speaker selectors have been
designed to let you add additional
speakers around your home or office
and turn them on and off without
purchasing additional amplifiers.
The Sima speaker selectors have the
following features:
• Ability to add up to 4 (SSW-4) or 6
(SSW-6) speaker pairs to your
amplifier
Front Panel
Figure 1, Front Panel (SSW-6 shown)
• Left and right “commons” are isolated
to work with all types of amplifiers
• Protection for amplifier and unit
• Small size to fit with any system
• No power required for operation
• Easy installation
• Can handle up to 100 watts amplifier
power with unique protection circuitry
Controls
1 Speakers 1 through 4/6 - Press
button in to select desired speaker.
Orange indicator will show which
speakers are active.
2 Indicators - Indicates selected
speakers when orange.
Rear Panel
Figure 2, Rear Panel (SSW-6 shown)
5 - Connection from amplifier -
from the speaker output of your
receiver or amplifier (100 watts
max).
Page 3
3 Labels - To customize your selector
to make speaker selection foolproof.
4 Protection Switch: Press in, with
the white indicator showing, to
activate impedance protection to
protect your amplifier from low
speaker impedance.
6 - Speaker Connections - Connect
your speakers to these terminals.
Typical Hook up
The diagram below shows a overview of a typical system with the SSW-6 using 6
speaker pairs.
Figure 3, Overview of typical system (SSW-6 shown)
Installation Tips
• It is recommended to use 18 or 16 AWG gauge stranded wire. For runs longer
than 50’, 14 gauge is recommended.
• You can mix 4, 6, 8 and 16 ohm speakers.
• Since speakers have different efficiencies, more efficient speakers will sound
louder than less efficient speakers. Either select your speakers to have the
same efficiencies (a typical measurement is 90 db/watt) or add a speaker
volume control between the SSW-4/6 and the speaker in the room where the
speaker is located where you want to adjust the volume.
• Wire according to state and local laws. Most places require that you use
special in-wall speaker wire with a specific “CL” fire rating. Consult your
dealer about obtaining such wire.
• Keep the speaker wiring from running close to AC power wiring for safety
and to avoid any noise pick up.
Installation
Make sure power is turned off on your receiver or power amplifier before doing
any wiring
• To make a connection, using a wire stripper, strip 3/8” of insulation from the
end of the wire. To avoid short circuits and possible amplifier damage, do not
strip too much insulation from the wire.
• Tightly twist the end of the wire so that there are no frayed wires.
Page 4
• Push the tab and simultaneously insert the wire into the correct hole.
• Verify that there are no wire frays.
Connect the wires from the speaker output from your receiver or amplifier to the
SSW-4/6 terminals marked AMPLIFIER. Pay attention and connect the “+”
output from the right front output on the amplifier to the right “+” input on the
SSW-4/6 and connect the “-” output from your amplifier to the “-” input on the
SSW-4/6. Likewise, connect the left channel wires to the left input of the
SSW-4/6.
Next, connect the wires from each of the speakers to the corresponding connection
on the SSW-4/6.
Finally, attach one of the pre-printed labels to the front of the unit in the recessed
area so the button matches the location of the speaker.
Operation
Initial connection
It is recommended that you select only one speaker pair in the same room you are in
for initial turn on. Select this speaker pair and turn on your receiver/amplifier. Make
sure sound is coming from both speakers. Before you turn on additional speakers, read
the information below.
Inputs
Pushing an input button on the front panel will select another speaker pair to turn
on. The orange indicator above the button will indicate the active button.
Protection Circuit
When to use the protection switch
When you have more than one speaker pair selected (see chart on page 6). This
circuit provides additional impedance so your amplifier does not drive too low of a
impedance. In addition, the protection circuit has an electronic circuit breaker to
automatically turn off if the volume level is excessive. It will automatically reset
when the overload is removed and/or the volume is reduced.
It is recommend
When you want to listen to just one speaker pair, especially at loud levels.
not to use the protection when:
Page 5
Refer to your amplifier or receiver’s user manual or on the rear panel of the
amplifier to determine the minimal speaker impedance that your amplifier can
handle.
If your amplifier can handle 4 ohm loads
1 selected
2 selected
3 selected
4 selected
5 selected
6 selected
4 ohm
speakers
Protection OFF Protection OFF Protection OFF Protection OFF
Protection ON Protection ON Protection OFF Protection OFF
Protection ON Protection ON Protection ON Protection OFF
Protection ON Protection ON Protection ON Protection OFF
Protection ON Protection ON Protection ON Protection ON
Protection ON Protection ON Protection ON Protection ON
6 ohm
speakers
8 ohm
speakers
16 ohm
speakers
If your amplifier can handle 2 ohm loads
1 selected
2 selected
3 selected
4 selected
5 selected
6 selected
4 ohm
speakers
Protection OFF Protection OFF Protection OFF Protection OFF
Protection OFF Protection OFF Protection OFF Protection OFF
Protection ON Protection OFF Protection OFF Protection OFF
Protection ON Protection ON Protection OFF Protection OFF
Protection ON Protection ON Protection ON Protection OFF
Protection ON Protection ON Protection ON Protection OFF
6 ohm
speakers
8 ohm
speakers
16 ohm
speakers
Calculating Impedance
If you want to calculate the impedance of speakers with different impedance here is
how to do it.
Parallel Impedance is equal to (R1 x R2) / (R1 + R2).
Say you had a 6 ohm and an 8 ohm speaker. The parallel impedance if you
selected these two speakers would be:
(6 x 8) / (6+ 8) =48 / 14 = 3.4 ohms.
If the calculated impedance is less than the minimal amplifier allowed impedance,
turn the PROTECTION mode on.
Page 6
Trouble Shooting
Problem Solution
No sound Make sure correct speaker is selected.
Make sure no wires are touching each other or the
case of the amplifier or SSW-4/ SSW-6 selector.
One or both speakers
turn off when music is
playing
Slight drop in volume
when PROTECTION
is turned on
Unit gets very hot Reduce volume level.
Reduce volume level and unit will automatically
reset. Internal protection circuit is detecting
overload or excessive volume level and is shutting
off speakers.
Normal - This is due to the additional resistance
added to protect your amplifier.
Turn unused speakers off.
If only one speaker pair is used, turn PROTECTION
switch off.
Technical Specifications
Input
100 watt per channel max
Outputs
4 Speaker pairs (SSW-4), 6 Speaker pairs (SSW-6)
4 to 16 ohm impedance
Protection Circuit
Amplifier Protection: 3 ohm resistor per channel
Unit Protection: Automatic resetting poly switch
Wire gauge
14 to 22 gauge
Size: 11.75” wide, 6.5” deep, 2” high
Weight: 3 lbs
Supplied accessories
User Manual (this document)
Sheet of front panel labels
Design and specifications are subject to change without notice.
Page 7
Limited Warranty
Limited Warranty
Sima Products Corp. (“Company”) warrants that is the accompanying product proves to be
defective to the original purchaser in material or workmanship within 90 days from the
original retail purchase, the Company will, at the Company’s option, either repair or replace
same without charge (but no cash refund will be made).
What you must do to enforce Warranty
You must deliver, mail or ship the product, together with both the original bill of sale and this
limited Warranty statement as proof of warranty coverage to:
Sima Products Corp., Att: Customer Service, 140 Pennsylvania Ave., Bldg. #5, Oakmont, PA
15139
It is recommended that you contact Sima to obtain a return authorization number.
Limitation of Liability and Remedies
Sima shall have no liability for any damages due to lost profits, loss of use or anticipated
benefits, or other incidental, consequential, special or punitive damages arising from the use
of, or the inability to use, this product, whether arising out of contract, negligence, tort or
under any warranty, even if Sima has been advised of the possibility of such damages. Sima’s
liability for damages in no event shall exceed the amount paid for this product. Sima neither
assumes nor authorizes anyone to assume for it any other liabilities.
Some states do not allow the exclusion or limitation of incidental or consequential dama ges,
so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
Sima Products Corp.
140 Pennsylvania Ave., Bldg. #5
Oakmont, PA 15139 USA
412-828-3700, 800-345-7462
412-828-3775 FAX
Visit us at www.simacorp.com
E-mail us at custserv@simacorp.com Manual # 21610, rev A
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