c701e714   
   XPost: rec.audio.pro, alt.audio.pro.live-sound   
   From: sound@inetnebr.com   
      
   wardy wrote:   
   > Hi,   
   >   
   > Advice needed please from all you experts out there.   
   >   
   > I have a decent background in sound engineering and live mic/desk   
   > setups, however I am no expert.   
   > I want to find the best way of installing a particular system in a   
   > public venue.   
   >   
   > I am installing a Technics amp with normal Stereo output (+- L and +-   
   > R)   
   > I have to send the audio thru the amp to 12 separate speakers across a   
   > sprawling venue.   
   >   
   > I have purchased a mono splitter and a stereo splitter.   
   >   
   > Firstly i tried the mono splitter so that each speaker would be mono.   
   > I tried to convert this stereo output from the amp to mono by   
   > combining the cables.  firstly i tried to wire both the + outputs from   
   > the amp into the + of 1 speaker cable and both the -  into the - of   
   > the cable. this however simply forced the amp to "click" off after a   
   > few seconds of sound so i presume it wasnt happy with the level of   
   > impedance of whatever.   
   > So a mono splitter is out.   
   >   
   > I am going to try the 6 way skytronic Stereo splitter next.   
   > I am going to run 2 cables from the amp to the splitter (for L & R)   
   > Then use the L and R channel from each of the 6 "rooms" on the   
   > splitter as a separate L or R speaker on either side of the room thus   
   > giving 12 speakers (6 L and 6 R).   
   >   
   > I havent set up a system where this many (12) speakers need to be run   
   > by 1 amp before so need your input please so i can learn as much as i   
   > can about running multiple speakers from 1 amp.   
   >   
   > Q - Does this sound like the best (and cheapest) solution?   
   > Q - Why did the amp click off when i was trying to join the stereo +   
   > and - outputs to make one mono + cable and one mono - cable?   
   > Q - anything you can teach me about wiring up Multiple speakers from 1   
   > amp using a speaker splitter from your own experience would be great.   
   >   
   > Looking forward to your advice.   
   > Thanks   
      
   Hack method:   
      
   get two 70 volt line transformers of a equal or slightly larger capacity   
   of your output power per channel and hook them up backward to the output   
   terminals of you amplifier to convert it to a 70 volt amp. Then use   
   speakers with 70 volt line transformers on them. You got a 50% chance   
   your amplifier might not like the load and blow, but your a gambling man   
   are you?   
      
   Hack method 2:   
   you find speakers with dual 25v/70volt transformers. You tap the 25V   
   taps so the combined impedance does not exceed the lowest rating of the   
   amplifier. 6 per side. Again, you have a 50% chance  your amp may not   
   like the load and say bye.   
      
      
   Hack method 3:   
      
   you put on your rubber nose and glasses and go down to Radio Shack and   
   buy the best Micronta or such PA amp and speakers.   
      
      
      
   Right method:   
      
   Get a mono professional 70 volt line out amplifier and do it right.   
   Make sure your using the proper code rated wire to hook them up.   
      
   bob   
      
   --- SoupGate-Win32 v1.05   
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