The customer has had some Valcom horns in place and working fine for years. Paging and BGM are fed into a V-2001A page control. Just one zone, no talkback.

Recently we added 8 more horns in a new addition. Since there were so many horns and it was a couple hundred feet away from the V-2001A, I added an additional VP-2124D power supply for the new horns. The audio pair was connected to the output of the original controller with the existing horns, and sent out to the new addition. There, the new power supply was connected to the power pair of the new horns.

In this configuration, the new horns did not work. No BGM, no page. If I connect the audio pair to the addition directly to the BGM source, the new horns work fine. There just is no paging going to the new horns.

I replaced the V-2001A controller with a new one. No change. Any thoughts on a next step?

Thank you.
Jim

Is this how you have it wired?

That's how I would like it to be, Dean. But if connected as your diagram, then horns 6 - 10 dont work. If I connect the audio pair for horns 6 - 10 to the music source (ahead of the Valcom unit) then they all hear music. But no paging on horns 6 - 10.

Time to call Valcom Tech support. Be sure you have a full count of all the speakers on which leg.

Are you sure they don't have a V-1095 70-Volt Expander installed?

What type of speakers did you install and how many and type was already installed?

I think you should be using a V-1904B Page Port Pre-Amp instead of the VP-2124D Power Supply. Look at the information proved on page 1, the bottom right paragraph in this document. Valcom One-way Paging System Design/Information

Geeze, this couldn't be any simpler. Did you splice the new audio pair to the existing audio pair? Where and how? Any amount of money you screwed that up somehow.

There are actually three outputs on the V-2001A. One for speakers that you don't want to have background music, only paging. Then there are two identical outputs for paging and music. You could have actually used the second output on J8 for the new speakers (but not the power).

Connect your butt set on monitor to the audio pair of the new speaker run and trace it back. You will hear the music on the butt set.

-Hal

Dean's drawing is absolutely correct. I have done this a few times. I think Hbiss is probably correct with his assessment. Roadie has a valid suggestion, but I would look to page 6 on the bottom right, to be sure that you aren't exceeding length too badly. I know that I have exceed it a few times without dire results.

If the existing speakers work then the new speakers should work if you connect the audio pair of the new run to the audio pair of the old run. Length is not critical. If you were able to make them work by connecting the audio pair directly to the BGM music source, you have all the information you need. The problem is where you have them connected. Check your work!

-Hal

Thanks everyone. Got some other fires to put out, and expect to get back to this problem next week. I have the old V-2001A with me and will check out my connections, etc. on the bench in the meantime.

I'll let you know.
Jim

I came to the Paging forum for a new problem I have, only to realize I never posted the resolution to my problem listed above. My apologies. So before I get into my next issue, here is what I found.

There were a combination of little things that all compounded the problem. There was at least one poor connection at the page horn. Once we had the lift out and found this, we checked all the new horns. After double checking all the wiring we also had the volume controls way too low on the new horns. We are using the second V-2001A for the new horns, and had to turn it up some. After a lot of tweaking, we have a working system.

Thanks for the suggestions.
Jim