MCM Electronics

Automatic A/B Line Level SwitchMCM Part #: 50-8385  |  Speakercraft Part #: LL-ONE

Automatic A/B Line Level Switch 4.8 stars from 4 ratings and 3 reviews.
Login to rate or review this product

Automatic A/B Line Level Switch
This switching device automatically selects between two line level sources to a single amplifier input. RCA female input/output connections accommodate left and right channels, making it perfect for all consumer electronic devices.

Note: This unit requires 12VDC, AC adapter sold separately, MCM Model #50-8362.

Product Description

Default Input–A is selected when no signal is present. When a signal is sensed at Input–B, the selector automatically switches to that input. A separate 12VDC, 100mA signal is also provided to trigger other external devices.

Trigger sensitivity is fully adjustable from 10~100mV. Off delay (from B back to A after absence of signal) is adjustable in eight steps from 0.5 seconds to 10 minutes.

Product Reviews

  • "Garry" by Bridge City Games on 10/26/2012
    Overall: 5 out of 5

    this item we have bought in the past and had very good success with

  • "electronics tech" by JEFFALLENDORF on 6/8/2011
    Overall: 4.5 out of 5

    very good product easy to use...needs to come with power supply

  • "Good switch." by jkliquid on 4/20/2010
    Overall: 4.5 out of 5
    Top 10 Contributor

    Works very well.

  • Rate It!

    Login Here to rate and review this product.

Others Also Bought

Image of Regulated 12VDC Power Supply - 200mA

50-8362 - Regulated 12VDC Power Supply - 200mA

200mA Power Supply for SmartPath IR Systems Plugs directly into SpeakerCraft terminator models AT–1.0 (Item #50-8335) or PT–1.0 (Item #50-8340), providing power to the entire IR repeater system. High quality unit is closely regulated at 12VDC. This unit is also ...

In Stock


Buy Now
Image of Digital to Analog Converter Toslink SPDIF to Line Level

80-8500 - Digital to Analog Converter Toslink SPDIF to Line Level

Digital to Analog Audio Converter A compact and clean converter for allowing you to connect standard analog audio equipment to sources that only have digital connections.

In Stock


Buy Now
Image of L/R Audio Balun

50-7725 - L/R Audio Balun

L/R Stereo Audio Balun Use to send two channels of unbalanced line level audio over Cat5 cable. This balun features two gold plated female RCA connectors, color coded red and white, and a single female RJ-45 jack. MCM offers a complete line of balun products...

In Stock


Buy Now
Package Specifications & Dimensions
Weight:0.32 lbs.
Warranty:1825 days
Need to Return?
Length:5 in.
Width:4 in.
Height:1.5 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No
Catalog Pages

MCM Cat 57, Page 231

MCM Cat 56, Page 033

PDF Reference

Requires Adobe Acrobat Reader.

Mfr. Info

Speakercraft Logo
Mfr. Name:Speakercraft
Mfr. Part Number:LL-ONE