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70V Amp Recommendations?
Nick Bair:
We've got a setup with 6 70V ceiling speakers (Tannoy CVS6) which we use to broadcast our services into an overflow seating area. I am looking for a new power amp to drive them.
I am thinking that 30W/each should be plenty for what we're doing, so I'm figuring on a 200W amp. I understand I could also get a low-Z amp but that it would have to be rated for much higher wattage (like 600W @ 8ohms). I would be fine with that as long as the price is right. Not looking to break the bank here, but don't want absolute junk either. Any suggestions?
Brad Weber:
Single channel 70V amps are typically more along the lines of the TOA P900 series range http://www.toaelectronics.com/amp0002.asp with a P-924MkII rated at 240W. That's pretty typical for paging and announcement type systems. Otherwise, you're right, it would actually be a minimum 625W into 8 Ohms to direct drive a 70V (or more accurately 70.7V) system, but since you only need one output that could be with the amp in bridge mono mode. Or you could split the six speakers into two runs and use a smaller two channel amp rated for 70V use or with an external transformer.
Nick Bair:
I have to admit, that TOA amp is too rich for my blood. Is that price point necessary?
I'm eyeballing the Yorkville CA1 (http://www.yorkville.com/products.asp?cat=34&type=31&id=230). Any thoughts?
Brad Weber:
--- Quote from: Nick Bair on April 01, 2011, 08:24:01 PM ---I have to admit, that TOA amp is too rich for my blood. Is that price point necessary?
--- End quote ---
The TOA is a very reliable and well proven commercial product, however it was offered more as an example of the type of product that would be common and there are definitely similar products at lower price points.
If you went with the Yorkville CA1 I would not tap all six speakers at 30W since that would equal the 70V rating of the amp and provide no accommodation for line losses, insertion losses, etc.
Frank DeWitt:
--- Quote from: Brad Weber on April 01, 2011, 10:19:30 PM ---The TOA is a very reliable and well proven commercial product, however it was offered more as an example of the type of product that would be common and there are definitely similar products at lower price points.
If you went with the Yorkville CA1 I would not tap all six speakers at 30W since that would equal the 70V rating of the amp and provide no accommodation for line losses, insertion losses, etc.
--- End quote ---
There is always a good supply of TOA P900 amps on Ebay Most seem to be pulled from service in business. They seem to go for crazy low prices. (No DJ is going to be caught with a TOA amp, I don't know why.
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