Gareth A Posted November 4, 2013 Share Posted November 4, 2013 I have 4 JBL Control 23av units. They are 8 ohm units. However, I am luckily in the position to have a QSC processor system which monitors all the loadings and power usage coming out of the amplifiers. The speakers are showing a ohm reading of close to 500 ohm. Which I know is definitely wrong. I've already changed the cable, and checked the amp channel using a known good speaker, and its ok. So definitely the speaker. When I measured the drivers inside, they both come back with a reading of 4 ohm. Im guessing its something to do with the snazzy little transformer in there, however thats just a big pile of glue .! Any ideas where I should be checking. Cheers. Link to comment Share on other sites More sharing options...
themadhippy Posted November 4, 2013 Share Posted November 4, 2013 Im guessing its something to do with the snazzy little transformer in therethere not 100v cabs are they? Link to comment Share on other sites More sharing options...
GR1 Posted November 4, 2013 Share Posted November 4, 2013 I do have to laugh when people come to this group before looking at the manufacturers website or Googling the product. The JBL website clearly details the speaker as coming with a transformer for 70 or 100 volt line use and with an 8 ohms through setting. It would appear that transformer is in circuit. Look at the user manual to set the speaker for 8 ohm use. What is wrong with reading the manual for a piece of kit? Link to comment Share on other sites More sharing options...
Gareth A Posted November 5, 2013 Author Share Posted November 5, 2013 FYI - Note my location. Google - does not work here defiantly. Also my mistake - its a Control 23 (Ignore the AV). The PDF Sheet which I have in front of me for this unit - definitely says nothing about 70v or 100v. PDF If I am still missing it then do say. And FYI I had looked at the manual more than once to check. However as I wrote AV (Because we replaced them with Control 25AV then you are correct they do have. Sorry I just remembered wrong and apologise GR1 for not reading it before posting. But back to the original post now - any more thoughts!? Link to comment Share on other sites More sharing options...
Brian Posted November 5, 2013 Share Posted November 5, 2013 The circuit... http://www.jblproservice.com/pdf/Control%20Contractors%20Series/Control%2023WH.pdf ...shows that it uses lamps for overload protection. Perhaps they've blown? Although I'd expect the resistance to rise to around 25 Ohms in that case. Link to comment Share on other sites More sharing options...
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