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- Subject
- Posted on
- Paging amp and speakers
- 02-04-2006
posted on
February 4, 2006, 12:22 am
February 4, 2006, 12:22 am
Howdy,
I am wondering about speakers connected to a paging amp. How do I go about
figuring out how many speakers can be connected to a paging amp? Basic math
and common sense tells me that a 35 watt amp will be able to drive 5 seven
watt speakers.
Is this correct?
Is this one of those circumstances where they say the Amp is 35 watts, but
really it is only 20 watts.
Then again, I know that sometimes the speakers wattage is measured in RMS or
something and what seems like a maximum of 5 speakers is really 10.
So, how do I figure out how many speakers I can connect to my Bogen TPU35B?
Thanks in advance,
John
I am wondering about speakers connected to a paging amp. How do I go about
figuring out how many speakers can be connected to a paging amp? Basic math
and common sense tells me that a 35 watt amp will be able to drive 5 seven
watt speakers.
Is this correct?
Is this one of those circumstances where they say the Amp is 35 watts, but
really it is only 20 watts.
Then again, I know that sometimes the speakers wattage is measured in RMS or
something and what seems like a maximum of 5 speakers is really 10.
So, how do I figure out how many speakers I can connect to my Bogen TPU35B?
Thanks in advance,
John
Re: Paging amp and speakers
John wrote:
That has a 70 volt output. That type of output exists so you can feed
speakers very far away - 1000+ feet. Also so you can feed many - maybe
60 to 80 or more if you were just playing quiet soothing background
music without paging. In a warehouse, you might feed 10 to 15 horns
that would be loud enough for paging
The speakers must have a "70volt transformer" - 70v amp would fry the
speaker or at least load the thing down real far. That transformer
will have 3 to 5 "taps" or wires, each one being louder and a greater
load. The taps will be identified as "quarter watt, half watt, up to 2
watts probably. Those WATT numbers cannot exceed 35 when added.
Of course, there is a normal speaker output - 16 ohms is what I see on
the spec I found online. In that case, I think you just wire in series
parallel as to not end up lower than 8 ohms (my guess the amp is quite
durable) and if you can hear, that's good.
Go 70 volts...that is the standard.
Re: Paging amp and speakers
Yes and no. You don't want to be the one closest to a trumpet tapped
at 7 watts. In general practice, 3-5 amps feeds a trumpet and 1-2
amps feed ceiling speakers very well.
Three methods, Math, trial and error, and an Impedance bridge or a
combination of the 3. I hear the new impedance bridges are digital
and pretty slick and TPU 60's aren't very expensive either.
.
Carl Navarro
Re: Paging amp and speakers
looking at for the speaker was adding all of the possible taps on the
speaker tranformer to arrive at the 7 watts they were reporting. I would
not have figured that out if you hadn't pointed me in the right direction.
Thanks for the information. I don't know what I'd do without you guys
helping me out.
John
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