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Dropping 100v speaker signal down to line input
Gary Fitzpatrick:
Hi,
So I have a few projects coming up where I need to get an audio feed into a camera. The easiest and shortest cable run would have me connecting into the 100v speaker lines going to the speakers in the church. Is it okay to use a standard 100v 8/16 ohm transformer to drop the signal down?
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John Roberts {JR}:
--- Quote from: Gary Fitzpatrick on June 02, 2018, 12:02:53 PM ---Hi,
So I have a few projects coming up where I need to get an audio feed into a camera. The easiest and shortest cable run would have me connecting into the 100v speaker lines going to the speakers in the church. Is it okay to use a standard 100v 8/16 ohm transformer to drop the signal down?
--- End quote ---
It might still be a little hot depending on how many watts it is tapped to deliver (less watts is better).
JR
Gary Fitzpatrick:
--- Quote from: John Roberts {JR} on June 02, 2018, 02:19:23 PM ---
It might still be a little hot depending on how many watts it is tapped to deliver (less watts is better).
JR
--- End quote ---
Thanks For the reply JR. what would you recommend for dropping it down? I see quite a few of these systems coming on board (it is for streaming church services) so I wouldn’t mind doing it “right”
Gary
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Geoff Doane:
1W into 8Ω is about 2.8 Vrms. If you allow 6 or 7 dB for the crest factor of the signal, that takes you down to an average level of just about +4 dBu. Chances are the crest factor is higher than that (average level is lower), but it looks like you'd be in the right ballpark, using the 1W tap on a transformer designed for an 8Ω speaker.
GTD
Gary Fitzpatrick:
That’s great...thanks for the advice.
Gary
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