what protection lamps do i need?
in [Live Sound]
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From: non-biz on 12 Jun 2007 00:37 Also - i dont have a schematic of the xover, its a generic looking one that is not JBL or any decent manufacturer. Its on a blue paper type PCB and looks like a radioshack special. No silkscreen or solder mask just bare copper traces. From what i was told, its a 2k x-over 6db/oct slope .
From: non-biz on 12 Jun 2007 00:49 Phil, when you say effectiveness is lost, do you mean the effectivness of the crossover?? I can see how the lamp would change the loading of the passive xover and change its frequency point constantly. I will continue to run these full range and not biamp active thru a processor. Will a polyswitch be any better choice? THanks again -eric
From: Phil Allison on 12 Jun 2007 00:52 "White Man Asinine Fool" > Also - i dont have a schematic of the xover, its a generic looking one > that is not JBL or any decent manufacturer. Its on a blue paper type > PCB and looks like a radioshack special. No silkscreen or solder mask > just bare copper traces. From what i was told, its a 2k x-over 6db/oct > slope . ** That JBL horn driver needs an 18 dB/ oct filter. Get a real x-over - cos that ratshack one ain't. ......... Phil
From: non-biz on 12 Jun 2007 00:53 - we posted at the same time.
From: Phil Allison on 12 Jun 2007 00:55
"White Man Arrogant Fool" ** Do not post in mid air like this. Read what has been posted already. > Phil, when you say effectiveness is lost, do you mean the effectiveness > of the crossover?? ** Read what has been posted already. > I can see how the lamp would change the loading of > the passive xover and change its frequency point constantly. ** Read what has been posted already. I will > continue to run these full range and not biamp active thru a > processor. Will a polyswitch be any better choice? ** No - much worse since it goes very high impedance when it trips and silences the driver instead of simply proving a bit of amplitude compression. ....... Phil |