sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services Security, Alarms and Paging 25V speaker on a 45 ohm line

I was looking at that transformer, it's a good jumping off point.

That'd work something like this, if I'm not mistaken:

45 ohm line -->atlas xfmr-->25v xfrmr-->spkr

Once I called Valcom, they convinced me to abandon the idea of using 25V speakers at all. They recommend I use the V-LPT paging adapter to connect the 45 ohm line to a group of self-amplified speakers. Checking out the cut sheet for the V-LPT I also noticed that it says it can be connected to an amplifier, which is where I got the idea for the Crown amp.

I'm thinking a basic block diagram would be:

45ohm line-->VLPT-->self amplified speakers

or

45ohm line-->VLPT-->crown amp-->speakers


Thanks again

That will work as long as you have 4 conductor wires or power outlet near each speaker for power.

Perfect, thank you for your help metelcom!

Sorry I fell behind on this one! Thanks for the help, metelcom.

The 45ohm output from you Valcom page control unit is meant to drive talkback speakers (45 ohm, non-amplified = hot output). The V-LPT will pad this signal and provide a line level output. You are correct in both scenarios using either self-amplified speakers or the Crown amp.