Question AV Receiver w/ Mic Input (Overlay over inputs)

Discussion in 'Home Cinema Buying & Building' started by acjuelich, Jun 10, 2015.

  1. acjuelich

    acjuelich
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    Hello Everyone,

    We have two Large Group Instruction (LGI) rooms at our building. They each have a Receiver, DVD Player, VCR, and then that connects to the speakers in the room. We'd like to add a wireless mic system to this but have it overlay all the other inputs depending what we have selected.

    Basically, we want to be able to have the audio come from the DVD Player, VCR, or Computer but still allow the Mic audio to be broadcast over all of this. I don't want our staff to have to be tap dancing between inputs all day.

    Is there a solution for this? Any recommendations?

    Thanks!
     
  2. Joe Fernand

    Joe Fernand
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    You will require a Mixer which caters for Line and Mic Inputs - there are Automatic mic levelling/feedback killer units which do a reasonable job to save you having an AV Tech on call 24/7.

    What Amplification is currently in place.?

    Are you envisaging a Hand Held Radio Mic you pass around the auditorium?

    Joe
     
  3. acjuelich

    acjuelich
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    Right now there is an older standard AV Receiver right now with everything running through RCA inputs - no amplifier or mixer. Is there not a way to do this with a standard AV Receiver? I'd prefer not to complicate it with a mixer. There are just two speakers up front. There would just be a wireless lavalier for the staff member.
     
  4. Member 581642

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    Make and model of current amplifier, plus make and model of other inputs.
     
  5. Member 581642

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    AV receivers are obvioulsy amplifers but generally as you have found only have one input active at a time.

    There is no way you can really do what you want without adding a mixer
     
  6. acjuelich

    acjuelich
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    Currently there is a JVC RX-558V that I want to replace. Inputs are all RCA (VCR, DVD Player, Computer).

    My end goal would to have all of this on and locked up so people can't tinker with it. Is there a simple receiver/mixer set up that would satisfy that or would someone have to touch it every time?

    I basically want someone to come in, put on the lavalier and turn it on, and then plug in computer or user VCR/DVD Player and be good to go with everything.
     
  7. Member 581642

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    I assume the video is also going through this unit if so are these just Composite video
     
  8. acjuelich

    acjuelich
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    At this point, no video. That is going straight VGA up to the Projector. Currently the projector only has VGA inputs.
     
  9. Member 581642

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    So the VCR/DVD currently has no video output.

    Sorry getting a little confused.

    If it's just audio we have a Soundfield system we use in classrooms that incorporates Wireless 2 x Infrared Microphones (one pendant and 1 handheld) , Amplifier and Mixer

    http://soundfields.co.uk/IR-300.asp

    Seb
     
  10. Joe Fernand

    Joe Fernand
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    You can't mix audio sources within an AVR - if you want the ability to overlay the Mic with one of your other audio or AV Sources you require a Mixer.

    Have just put something similar together in a Corporate office in Edinburgh - we are mixing Mic, VC, Sat and Blu-ray into a Pioneer AVR.

    Plenty of 'Simple' options - though you can guarantee someone will come in and change settings unless you hide the bits which can be adjusted away.

    Cloud do an affordable range of Mixer/Amps you can hide away and have a Line Input wall socket with adjustable Vol pot to allow users to plug in a Laptop or similar.

    Happy to help if you want to give us a shout.

    Joe
     
    Last edited: Jun 11, 2015
  11. Member 581642

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    A domestic AVR does seem overkill and a little redundant in this scenario as you arent using any of its video capabilities
     
  12. acjuelich

    acjuelich
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    All video is going straight to the projector. Audio is going through AVR.

    So if I got a mixer, I'd need a channel for each input, right? Would I just connect that to an amp and then to speakers?
     
  13. Member 581642

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    Yes and input per device and yes mixer to amp , though the one i linked to has both amp and mixer
     
  14. Joe Fernand

    Joe Fernand
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    Mixer - a budget unit will usually be configured with one or two stereo line in on 2RCA the rest of the channels will be mono inputs on XLR or 1/4 jack so count on two channels per stereo source plus the required cables or adapters.

    See - http://www.behringer.com/EN/Category/Mixers.aspx?s=G100

    Joe
     
    Last edited: Jun 12, 2015
  15. Member 581642

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    Just for reference the IRA-300 i linked to with the built in amp and mixer is £250+VAT if you have it without the microphone part. You can then still add a radio microphone as it also has a seperate Mic level input
     

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