ceiling speaker system wiring

C

chuck clark

Guest
Hi,
I am installing a ceiling speaker system in a friends office. I have
an amp
and 7 speakers and plenum rated wiring. I am trying to figure out
exactly how
to wire this. I have some pictures here of the equipment.

http://www.largeprojections.com/speakers/

The 7 speakers will reside in 6 separate areas, each in a separate
room, except for 2 speakers in a larger room.

I have been reading this article
http://www.partsexpress.com/resources/70volt.html

I believe I can just connect all the speakers in parallel. Is this correct?

Also, I believe I should use the 70w tap off the amp, but where do
I connect the other wire? I don't understand these amp obviously.

Any help is appreciated,
Chuck
 
chuck clark wrote:
Hi,
I am installing a ceiling speaker system in a friends office. I have
an amp
and 7 speakers and plenum rated wiring. I am trying to figure out
exactly how
to wire this. I have some pictures here of the equipment.
Click to expand...
Try getting two more speakers; put 3
each in a series string, then wire the
strings in parallel.

AMP-----+-----+----+
| | |
S S S
| | |
S S S
| | |
S S S
| | |
AMP-----+-----+----+



Keep in mind - no matter how you wire
them, each speaker will get (at best)
1/7th to 1/9th of the total power
output of the amp.

[snip]

I believe I can just connect all the speakers in parallel. Is this
correct?
Click to expand...
Only if you want to let the magic smoke
out of your amp!

In other words: no, that is not correct.
 
Try getting two more speakers; put 3

each in a series string, then wire the
strings in parallel.

AMP-----+-----+----+
| | |
S S S
| | |
S S S
| | |
S S S
| | |
AMP-----+-----+----+



Keep in mind - no matter how you wire
them, each speaker will get (at best)
1/7th to 1/9th of the total power
output of the amp.

[snip]

I believe I can just connect all the speakers in parallel. Is this
correct?


Only if you want to let the magic smoke
out of your amp!

In other words: no, that is not correct.
Click to expand...
Hi,
I just want to be totally clear, Is this setup true if each speaker
has a transformer?

Thanks,
chuck
 
"chuck clark" <chuck@no-spam.mail.utexas.edu> wrote in message
news:bgrCc.9117$w3.161@fe2.texas.rr.com...
Try getting two more speakers; put 3

each in a series string, then wire the
strings in parallel.

Hi,
I just want to be totally clear, Is this setup true if each speaker
has a transformer?
Click to expand...
No, it's not. You connect the transformer primaries in parallel,
as in the second diagram, between para. 6 and 7.10.1.
http://www.partsexpress.com/resources/70volt.html

Good Luck!
Rich
 
I have an amp and 7 speakers
I have been reading this article
http://www.partsexpress.com/resources/70volt.html
I believe I can just connect all the speakers in parallel. Is this correct?
Chuck Clark

Ignore Randy and, as Grise says, follow Fig 7-16 exactly.
Click to expand...

I believe I should use the 70w tap off the amp,
but where do I connect the other wire?

The transformer primary of each speaker
Click to expand...
gets 1 wire from COM (common--makes sense now, yes?)
and 1 wire from the 70 volt output.
Yes, these will be parallel connections.

In this application, it won't make any difference
(well, maybe the room with 2 speakers)
but standard practice is to put the same (hot) wire on the same point
(same terminal number) on each speaker.
The same goes for the common wire.
e.g. white wire on Term1, black wire on Term4.
This is called "phasing".

You got good equipment, collected good information, and posted here well.
Atta-boy. Now just finish the job.
 
JeffM wrote:
I have an amp and 7 speakers
I have been reading this article
http://www.partsexpress.com/resources/70volt.html
I believe I can just connect all the speakers in parallel. Is this correct?
Chuck Clark


Ignore Randy and, as Grise says, follow Fig 7-16 exactly.
Click to expand...
???

Where in the original message did the
original poster say he had a bunch of
impedance-matching transformers handy?

I agree 7-16 is the way to go, but the
OP sounded like he wanted to just lash
together a bunch of speakers!
 
Randy Day wrote:

JeffM wrote:

I have an amp and 7 speakers
I have been reading this article
http://www.partsexpress.com/resources/70volt.html
I believe I can just connect all the speakers in parallel. Is this
correct?
Chuck Clark


Ignore Randy and, as Grise says, follow Fig 7-16 exactly.


???

Where in the original message did the
original poster say he had a bunch of
impedance-matching transformers handy?

I agree 7-16 is the way to go, but the
OP sounded like he wanted to just lash
together a bunch of speakers!
Click to expand...
Hi,
I didn't put any specs of the equipment because it was clearly
visable in the
picutures.

Many thanks for everyone's help. I have it all working now!

Chuck
 
"chuck clark" <chuck@no-spam.mail.utexas.edu> wrote in message
news:GoACc.10095$w3.9364@fe2.texas.rr.com...
Randy Day wrote:

Where in the original message did the
original poster say he had a bunch of
impedance-matching transformers handy?

I agree 7-16 is the way to go, but the
OP sounded like he wanted to just lash
together a bunch of speakers!

Hi,
I didn't put any specs of the equipment because it was clearly
visable in the
picutures.

Many thanks for everyone's help. I have it all working now!
Click to expand...
Chuck, were you the OP? I remember, in the post that I
responded to, that you'd asked, "Do I connect the speaker
terminals, or the transformer terminals?" or something of
the sort. I was kinda able to figure out that each speaker
had come with its own 70 Volt transformer.

Cheers!
Rich
 
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