I have a friend who owns a bar. he uses a receiver to play back ground music when the jukebox isn't playing through the same speakers. I am looking for a module I can put both lines into and one out to the speakers that will mute the slave side when there is current on the master side. Has anyone used something like this?

I use this and it works great.

Speakercraft SL-One

Does the juke box have an amplifier? Do you mind having two seperate volume controls (if the juke has an amp, and the audio system has an amp)?

If yes, speaker level a/b would work. Be aware that you may have false triggers, depending on response time.

If no, using a line level device would work. Same potential issues.

Russound and Niles offer alternatives as well.

Is it a Rowe network jukebox? If so, it has a line out that can feed separate amplifiers and an AUX in, which can take the signal from the receiver. The company that owns the jukebox won't like it if you open their machine but the key from a garage door T-handle will probably open it if it doesn't have a cylinder lock, like a Coke machine. If it's Rowe, call (877) 762-6765 and ask for Technical Support. They'll need the model, serial number and number of channels used, the IP address, location name and vendor name (they can access these from outside for setup changes if you don't have access or the vendor can't be there. I would call the vendor to tell them what you want to do but be prepared for them to tell you that it can't be changed from the outside if they happen to not be particularly tech-savvy, like the one I dealt with a couple of years ago.

Otherwise, Niles makes one of these modules- if you would need a line in, A and B speaker input AND 2 channel amp, the TVA-20 or TVA-50 would work. It also has 12VDC trigger in/out (separate jacks). It has a variable threshold, so one source can be the default and it will trigger the second source when someone starts it. Pretty sure they have a line-level piece that does similar things.

From the way this is worded he has two sources going into an AV receiver (jukebox and CD perhaps?). So that's going to be a low level input and the above referenced unit from speakercraft won't solve this issue. If that's what's going on he needs a low level priority switch. The speakercraft equivalent is the LL-One...two analogue low level sources in with one being priorty (cd) and other being sense (jukebox), one low level out to AV receiver input.

Fred's point about false triggers are valid and can require some tweaking on the switcher. Also depends whether or not the jukebox fully shunts the audio outputs when no tracks are playing. With some testing and adjusting you should be able to get him setup with this. Sounds like a low budget type install (given the use of an AV receiver) so I'd go this route first and see how you do.

Two sources....one set of speakers. a receiver for background music and a jukebox for (paid) music

source 1 (receiver)
source 2 (jukebox)

I haven't seen it yet....I don't know how they are switching it now

Well...then forget what I said :-)

Sorry to grind on this. I still don't know if there is one amp (receiver) or two (jukebox and receiver)

I certainly can make it work in any number of cases, but more info is required.

See post #6

I think what Fred is "grinding on" is the question of if you are dealing with one line level source and a high level source or are you dealing with two line level sources...Fred, correct me if I am wrong....as for my two cents worth, if it is two line level sources....what Fred said. :)

Who owns the jukebox?

Most have the switching built in and works well IF your client owns the jukebox.

If it is owned by a vending company,I doubt if they would give you access because they aren't making money when the radio is on.In that case,I always used a automatic switcher from RDL and let the client hash it out with the vendor.

I just read the OG post and have to run out of the office in a minute, so I'm chiming in hear without reading every one else posts but... But we run into this ALL the time at the bars we take over. The best way to solve this issue is with a DBX Zone pro product. When the juke box kick on you can insert a priority ducking feature, and then a AGC module to keep the volume consistent.

two....receiver with it's own and the jukebox with it's own

yes we use the ducking modules at the Fox and Hounds we service. but I don't think this needs to be to that extend.

all great ideas so far!

So this is speaker level stuff we're talking about. You don't specifically say so but "a receiver for background music" implies it.

Re false triggers -- if one of these plays louder than the other one, that is the one that should trigger the switch. It's possible in some settings for the trigger to be so low in level that a source drops out. That said, this is a bar and background music or juke box are both going to be loud.

That brings the opposite situation into play, being random noise loud enough to trigger by accident: say you use the juke box to trigger the relay and for some reason the juke box clicks when house A/C kicks in. That will switch away from the background music. To silence. If you get false triggers from something that is not playing, you'll want to use the other unit as the trigger unit.

This can be totally avoided if you make the receiver the trigger unit and use 12 volts from a wall wart plugged into a switched outlet on the receiver... if it's got one and if you want to turn the amp off every time you don't want to use it.