HELP passive tweeter xover tweak time sensitive.. - diyAudio
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Old 24th April 2012, 07:41 PM   #1
diyAudio Member
Join Date: Jun 2005
Location: Fort Collins Colorado
Default HELP passive tweeter xover tweak time sensitive..

I'm moving to Denver in a couple of days and have had to sell stuff I wanted to keep. I picked up 4 JBL eon 1 copies for 200 bucks for use as front monitors.
They guy said they sounded like crap, he was right.
Turns out, they were silkscreened wrong and they were out of phase...LOL
I corrected that and I dropped the tweeter crossover cap from 3.3uf to 4.7uf and now they sound very good. The 4 together will make quite an earsplitting lead vocal monitor.
Its a 150w amp with a passive xover for the tweeter only. Fine I prefer that arrangement for a more open sound from the woofer and better efficiency.
bi-amp is always better when I can find em cheap.

There is a protection device (thermistor?) across the last 10 ohm resistor in the circuit. I probably should leave that alone. C60 X065

There is a clip light arrangement on the front panel, driven by the crossover. This is different than the peak light on the amp itself.
It goes as follows, 1k resistor to led and to a 1N4148. Both diodes to gnd.
The led is always lighting up. I'd like to simply remove it and grab a feed off the peak light on the amp instead. Since it is arranged like a distortion clipper in a guitar pedal, yanking that circuit should be fine...right? It doesnt seem to be protecting anything. It's not wired across the tweeter but on the input side of the xover. I would have expected it on the output side like the old early 80's series clip light (led) protection schemes that made your tweeters sound like poo poo.
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Old 24th April 2012, 07:43 PM   #2
diyAudio Member
Join Date: Jun 2005
Location: Fort Collins Colorado
Or should I even bother changing the 1k to a higher value to raise the light up threshold.
Seems like it would just add distortion.
Oh yeah, these are for live sound.
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