Monoprice

Monoprice 138176 60W Volume Control with A/B Switch

Effortless Audio Control for Multi-Speaker Setups The Monoprice 60-Watt Volume Control with A/B Switch (Model 138176) is the ideal solution for connecting multiple speaker pairs to a single amplifier or receiver. This impedance-matching device protects your amplifier by increasing (or decreasing)...

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*Price sourced from Amazon.com. Last updated:Jun 28, 2026.Price and availability are subject to change.

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Overview

Effortless Audio Control for Multi-Speaker Setups

The Monoprice 60-Watt Volume Control with A/B Switch (Model 138176) is the ideal solution for connecting multiple speaker pairs to a single amplifier or receiver. This impedance-matching device protects your amplifier by increasing (or decreasing) the impedance of connected speakers, ensuring safe and optimal performance. Supporting amplifiers up to 60 watts, it fits seamlessly into standard single-gang low-voltage junction boxes or mounting brackets. The integrated A/B switch allows you to effortlessly select between two sets of speakers in the same or different rooms, providing ultimate control over your audio environment.

Specifications:

  • Brand: Monoprice
  • Model: 138176
  • Power Handling: Up to 60 Watts
  • Functionality: Impedance Matching Volume Control with A/B Switch
  • Installation: Fits Standard Single-Gang Low-Voltage Junction Boxes
  • Switching: A/B Speaker Selection

Key Features

Allows you to connect multiple speaker pairs to a single power amplifier or receiver.

It increases (or decreases) the impedance of the connected speaker pair to ensure that the overall impedance level presented to the amplifier is high enough to prevent damage to the amplifier

It can support amplifiers with up to 60 watts of output power.

Fits into standard single-gang low-voltage junction boxes or mounting brackets.

A/B switching allows you to connect two sets of speakers and one source, either in the same or in different rooms.

Specifications

Power Handling
Up to 60 watts
Switching Capability
A/B Switch
Installation
Fits standard single-gang low-voltage junction boxes
Function
Impedance matching
Connectivity
Multiple speaker pairs to single amplifier

Pros & Cons

👍 Pros

  • Allows connection of multiple speaker pairs to a single amplifier, simplifying setup.
  • Manages impedance for connected speakers, preventing damage to the amplifier.
  • Supports amplifiers with up to 60 watts of output power, suitable for many home audio setups.
  • Fits into standard single-gang low-voltage junction boxes, ensuring a clean installation.
  • A/B switching functionality allows selection between two sets of speakers.
  • Ideal for powering speakers in different rooms from one source, offering audio versatility.

👎 Cons

  • Limited to supporting amplifiers with a maximum of 60 watts, which may not be sufficient for higher-power audio systems.
  • Does not specify the number of speaker pairs it can connect, beyond "multiple."
  • The device may introduce some signal path loss due to its impedance-matching circuitry, though not explicitly stated.
  • Requires installation into a junction box, which might necessitate electrical work or professional installation for some users.
  • Lacks any advanced features like remote control or app integration for modern smart home setups.

Frequently Asked Questions

This volume control unit can support amplifiers with up to 60 watts of output power, making it suitable for many typical home audio setups.
Yes, it allows you to connect multiple speaker pairs to a single power amplifier or receiver, offering flexibility for your audio system.
It increases or decreases the impedance of the connected speaker pair, ensuring that the overall impedance level presented to the amplifier is high enough to prevent damage.
This unit is designed to fit conveniently into standard single-gang low-voltage junction boxes or mounting brackets for a neat, integrated look.
The A/B switching function enables you to connect two sets of speakers to one source and switch between them, allowing for audio in different rooms or selective listening.
The provided features do not indicate that this volume control unit includes a remote control; it operates via a manual control knob.