Hey guys, got stuck on a project.
I have to do a 100v pa system with 10 speakers. Got plans about wiring but the plans weren't very specific on how to wire them so I ended up wiring individually 10 speakers which go to a networking rack where a mixer with amplifier should reside. The real problem is I just found out that the attenuator(volume pot) has a built in 24v priority relay which I believe should be to bypass the potentiometer(in case the rooms set the pot to 0 an emergency broadcast should bypass that, i think). The plans do not mention another wire except for the feed to the speakers. In fact in the plans, it says that main wire goes from the amplifier to the speaker, and from the speaker to the attenuator.
My experience with pa is absolutely 0. Can someone please tell me if the 24v relay should be powered from another wire?
Are there speakers which would power that relay?
In the equipment list I dont have anything related to additional equipments to power that relay. Just speakers, attenuator, a microphone console and an amplified mixer. Google isnt helping at all and frankly there isnt any specialist in a 200 mile radius from my place.
To make things worse the cables are now covered with 2 inches of concrete. I can somehow pull new wires through the attic in case I need to.
I'm sorry i dont have the plans with me, to post a photo, will come back.
I have to do a 100v pa system with 10 speakers. Got plans about wiring but the plans weren't very specific on how to wire them so I ended up wiring individually 10 speakers which go to a networking rack where a mixer with amplifier should reside. The real problem is I just found out that the attenuator(volume pot) has a built in 24v priority relay which I believe should be to bypass the potentiometer(in case the rooms set the pot to 0 an emergency broadcast should bypass that, i think). The plans do not mention another wire except for the feed to the speakers. In fact in the plans, it says that main wire goes from the amplifier to the speaker, and from the speaker to the attenuator.
My experience with pa is absolutely 0. Can someone please tell me if the 24v relay should be powered from another wire?
Are there speakers which would power that relay?
In the equipment list I dont have anything related to additional equipments to power that relay. Just speakers, attenuator, a microphone console and an amplified mixer. Google isnt helping at all and frankly there isnt any specialist in a 200 mile radius from my place.
To make things worse the cables are now covered with 2 inches of concrete. I can somehow pull new wires through the attic in case I need to.
I'm sorry i dont have the plans with me, to post a photo, will come back.
Attachments
there should be terminals on the amp marked for the priority function and yes you need a pair of wires for that
It’s hard to see as the documentation that I can find is vague but the amplifier 100V line output looks to be connected to the attenuator and the speakers are fed from the output of the attenuator. You do not mention the speaker ratings but a general rule of thumb is to choose speakers with a total power of no more that 90% of the amplifier power. In this case you should include the attenuator in the calculation, so maximum of 9 watts per speaker if they are the same power and a maximum total of 90 watts if they are of different power ratings. Depending on the efficiency of the speakers that will be quite loud at 100 watts.
I did an upgrade to a system in our local social club recently. Replaced most of the old Toa 6W ceiling speakers with some Australian Monitor QF6CS.I also increased the amplifier power from 100 watts to 240. The change was dramatic but even the few remaining Toa Speakers sounded much better with the new amp. Clearly the original amp was underpowered. Anyway good luck with the system.
I did an upgrade to a system in our local social club recently. Replaced most of the old Toa 6W ceiling speakers with some Australian Monitor QF6CS.I also increased the amplifier power from 100 watts to 240. The change was dramatic but even the few remaining Toa Speakers sounded much better with the new amp. Clearly the original amp was underpowered. Anyway good luck with the system.