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This topic comprises 2 pages: 1 2
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Topic: Microphones
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William Hooper
Phenomenal Film Handler
Posts: 1879
From: Mobile, AL USA
Registered: Jun 99
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posted 01-26-2000 02:13 AM
I don't see a microphone pre-amp in the Radio Shack catalog. You may need to get one from a local music (guitars & stuff) store. They may even have something used & inexpensive.Those little rack mount mixers in the Radio Shack catalog have mic inputs & line level out. You could get one of those, hook your usual non-sync up to whatever the aux is, & add a mic. Then you could do talkovers. Unless you run Movie Tunes in your theater. In which case you will want to go ahead & get the mixer & two turntables so that you may substitute jammin wickety-wack booth mixes & rap instead of that wretched Movie Tunes mess. Even a nice phat ground loop hum would be better than the guy with that plastic 1980's cheesoid delivery.
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Aaron Sisemore
Flaming Ribs beat Reeses Peanut Butter Cups any day!
Posts: 3061
From: Rockwall TX USA
Registered: Sep 1999
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posted 01-26-2000 04:14 AM
The best way to add a live microphone to a permanently-installed theatre sound system is to BUY A SEPARATE P.A. AMP AND SPEAKER(S)! and leave the theatre's amp rack alone! Having a live mocrophone in front of a screen which has a number of speakers behind it is inviting BIG trouble with feedback, which can be disastrous for amps, speakers (especially HF drivers), and of course, patrons' ears!If you must connect a live mike to a theatre sound system, try to connect it so it will output thru the surround speakers, as these will be the least susceptible to feedback, and if you have good enough surround coverage in the auditorium, it will make it easier for the patrons to hear what is being said because you can use more volume with less chance of feedback! CP500s have a mike input inside that can be programmed to route the signal to the center channel (NOT recommended) or the surrounds. I am sure other cinema processors have similar capabilities as well. Another option is to connect the preamplified microphone (or better yet,wireless receiver) to the surround channel power amp input and use the output control on the RECEIVER (or PREAMP, if possible) to adjust the mike volume. If I get a request for a live mike in an auditorium I explicitly recommend them to procure their own PA system. This makes life much easier for all involved, and none of the theatre's sound system settings are ever disturbed. Aaron
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Stefan Scholz
Expert Film Handler
Posts: 223
From: Schoenberg, Germany
Registered: Sep 1999
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posted 01-26-2000 07:12 AM
We have two mics installed in the large Todd AO theatre, one is a cable type vocal mike, the other is a wireless, which could be handed to the auditorium for discussions etc.
We feed into surrounds with delay time set to 99 ms (Pony DFP 3000), which gives extra freedom from feedback due to time-delay, but requires a trained announcer, as it is a little difficult to speak against the echo.
We use a little rack mount mic/line preamp mixer from recording business, that allows us to connect 4 mics as well as 4 stereo N/S sources. Anything was redily available at a local music/ RnR store.Within the 2nd theatre, we use a seperate PA system, with microphones and PA speakers beside the stage opening. As this place has a convertible stage for live performances, it was neccessairy to run on a seperate system. Personally I prefer this solution, even though the components used are basicly Railway station quality..., but you could buy better items.
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 01-26-2000 12:53 PM
I've had my best results with using a wireless (eg Telex) microphone system. The Telex system puts the signal out at mic or line level so it can go into the cinema processor where it is easy (some have mic inputs some just have aux, non-sync, mag or what ever).As others have stated, just have the mic come out of the SURROUNDS not the stage channels. Feedback shouldn't be a problem. If you have a good and proper installation, ie with 1/3 octave EQ or equivalent on the surrounds, it should sound pretty darn good too. Steve ------------------
"Old projectionists never die, they just changeover!"
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Paul Powers
Film Handler
Posts: 14
From: Marin, CA
Registered: Jan 2000
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posted 02-02-2000 06:14 PM
We had a micophone hooked up through our CP200 and it worked well but I am not sure if the speakers used were the surounds or the center channel. I would think the surounds as the mic jack was directly under the screen and the mic was always used directly infront of the center channel speakers. Never had any feed back problems. But alas last may we had a big upgrade for episode 1 and we seem to have lost the mic line from behind the screen :{ -=|Paul
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