Monoprice SS-4 Premium 4-Channel Speaker Selector
Product # 38157
UPC # 889028123072
$79.99
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Key Features
- Connect and safely control multiple speaker pairs with a single amplifier
- Automatic impedance protection circuitry
- 100 watts RMS per channel power capacity
- 5‑ohm minimum amplifier impedance with four 4‑ohm speakers selected, 6‑ohm minimum with 8‑ohm speakers
- Supports 12‑16 AWG speaker wire
- Individual zone on/off buttons
- Heavy‑duty screw‑type connectors
- Isolated left/right circuit grounds provide a safe connection for amplifiers with floating grounds or bridged configurations
- Accurate, noise‑free switching
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Browse 9 questions
Browse 9 questions
and 8 answers
Do I need to connect the amp input on the switch to two speaker outputs on my receiver? I'm currently only getting sound from 2 out of 4 speakers.
Laurance B
on Apr 29, 2021
Yes, you'll need to connect the input on the switch to both a Right and Left output from the amp (should be 4 wires total, a +/- for each).
- Reply
- Inaccurate
- Adam R on May 21, 2021
- Purchased on Nov 27, 2020
There should be 4 wires from receiver to switch: L+/- & R+/-. Then 16 wires going to 4 speakers.
- Reply
- Inaccurate
- Randy on May 21, 2021
- Purchased on Jul 31, 2020
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Because this switch has impedance matching, do the volume controls after this switch need to be impedance matching also?
Kevin B
on Mar 14, 2020
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Will this work in the opposite way - connect / switch between two amps to one set of speakers?
A shopper
on Dec 31, 2020
BEST ANSWER: No it’s not possible to do that unless you run 1 amp to 1 speaker and the 2nd amp to the other speaker.
- Reply
- Inaccurate
- Dwayne W on Dec 31, 2020
- Purchased on Dec 2, 2020
BEST ANSWER: No it’s not possible to do that unless you run 1 amp to 1 speaker and the 2nd amp to the other speaker.
- Reply
- Inaccurate
- Dwayne W on Dec 31, 2020
- Purchased on Dec 2, 2020
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Is there a recommended rack setup for this product?
Christopher K
on Dec 28, 2021
BEST ANSWER: It has padded feet to keep it from sliding on a shelf (or on top of other equipment) but it is not designed to rack mount.
- Reply
- Inaccurate
- Scott M on Dec 28, 2021
- Purchased on Jun 28, 2021
BEST ANSWER: It has padded feet to keep it from sliding on a shelf (or on top of other equipment) but it is not designed to rack mount.
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- Inaccurate
- Scott M on Dec 28, 2021
- Purchased on Jun 28, 2021
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Can you have multiple speakers selected at the same time?
Rob D
on Jun 21, 2022
BEST ANSWER: you can...be careful as it will drive more of the amp power and you could clip the amp.
- Reply
- Inaccurate
- Todd P on Jun 21, 2022
- Purchased on Aug 17, 2021
BEST ANSWER: you can...be careful as it will drive more of the amp power and you could clip the amp.
- Reply
- Inaccurate
- Todd P on Jun 21, 2022
- Purchased on Aug 17, 2021
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Hi, Hope all is well. My goal is to connect two 8ohm center channel speakers to my AV Receiver. Can I wire from the center speaker terminal from the receiver to just the left terminal input of the selector(for example), then connect both center channel speakers to Zone 1 left and Zone 1 right output? And will they remain at 8 ohms? thanks, Antoine
A shopper
on Jul 12, 2024
BEST ANSWER: Using two center channel speakers will tend to cause more problems than solve.
- Reply
- Inaccurate
- New User U Staff on Jul 15, 2024
BEST ANSWER: Using two center channel speakers will tend to cause more problems than solve.
- Reply
- Inaccurate
- New User U Staff on Jul 15, 2024
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If the 100watts is max RMS power handling, what is the peak power handling short term? Does this have a protection switch to increase power handling? Thank you!
A shopper
on Oct 2, 2021
Can I use this with in wall impedance matching volume control switches? I don’t need impedance matching speaker selector as my in wall volume controller dos the impedance matching.
Ara G
on Aug 15, 2022
I purchased SS4 Premium.
There is a one page manual with very limited information.(!) Where can I get more complete understanding of how this should work in coordination with vintage stereo (Nikko STA-7070 35watts per channel). Does this unit modify impedance to provide the same impedance to each set of speakers no matter the number of sets involved? What happens to the “power” at each set of speakers? -when one, two, three, or four zones are activated?
There is a one page manual with very limited information.(!) Where can I get more complete understanding of how this should work in coordination with vintage stereo (Nikko STA-7070 35watts per channel). Does this unit modify impedance to provide the same impedance to each set of speakers no matter the number of sets involved? What happens to the “power” at each set of speakers? -when one, two, three, or four zones are activated?
A shopper
on Oct 20, 2025
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Rated 5 out of 5
Good Quality and Value
Excellent product, just as advertised and great value.
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Rated 5 out of 5
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Rated 5 out of 5
Fit the bill almost perfectly
After years and years, I finally finished connecting my outdoor speakers by adding this to my system. I ordered the SS-4 and it arrived within a few days. Another few days and I finally got around to installing it. It was a snap to install. Another few days later and I installed my outdoor speakers. I turned on my system and tested the switch out - it worked and on the first try (that's a knock on my usual project outcome). My only complaint is that I should have bought the unit with the volume control. I have a long speaker wire run (50 ft. or so but used 12 ga. wire) and there is a significant volume difference between the speakers on the different switches. I'm guessing with the volume control I could address that. Overall though I am very pleased with the quality of the unit, ease of install and that my receiver does not seem affected by the added load.
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