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Tom Loizeaux
05-06-2005, 05:08 PM
I just finished a pair of floor monitor cabinets. I'm using an E120 as the cone driver and a 2402 as the tweeter. I plan to run the E120 full range and bring in the bullet tweeter where the E120 starts to fall off. The questions are:
What slope, 6 or 12dB, should I use and at what frequency should I use in
my high pass filters?
I have it wired up now in test mode with a 15 ohm resistor in series with the 2402 to help even the output with the E120, and I have a 1.5uf cap in there, so it's now a 6dB high pass. I think I'm bringing in the bullet around 5K, but it builds slowly from much lower then that. When I sweep a signal through I hear a peak in the E120 at around 2K and another smaller one around 4K...
Any suggestions from you guys experienced with live sound and floor monitors about these choices? Is there a rule of thumb concerning setting up these drivers to work together?
Thanks,

Tom

Zilch
05-06-2005, 05:42 PM
http://www.jblproservice.com/pdf/Cabaret%20Series/4602B.pdf

$54.84 or $92.15 each, depending upon which line on the parts list you look at. :p

E120 runs full range, and it crosses at 3 kHz.

Izzat 12 or 18 dB?

Perhaps Giskard can give some guidance on the tapped inductor there....

Tom Loizeaux
05-06-2005, 06:55 PM
Sorry, my title should have read:

Floor monitor/2402 help

Tom

scott fitlin
05-06-2005, 07:38 PM
I just finished a pair of floor monitor cabinets. I'm using an E120 as the cone driver and a 2402 as the tweeter. I plan to run the E120 full range and bring in the bullet tweeter where the E120 starts to fall off. The questions are:
What slope, 6 or 12dB, should I use and at what frequency should I use in
my high pass filters?
I have it wired up now in test mode with a 15 ohm resistor in series with the 2402 to help even the output with the E120, and I have a 1.5uf cap in there, so it's now a 6dB high pass. I think I'm bringing in the bullet around 5K, but it builds slowly from much lower then that. When I sweep a signal through I hear a peak in the E120 at around 2K and another smaller one around 4K...
Any suggestions from you guys experienced with live sound and floor monitors about these choices? Is there a rule of thumb concerning setting up these drivers to work together?
Thanks,

TomI use the 2402,s and I cross over at 7K, 18db per octave, this works, and sounds good!

IMHO, a 5K crossover point is too low for the bullet to sound good, even though it can take it, it will be too raspy sounding! I would use an 18db slope, with a 7K xover point, and you will get good results! The question is can the E120 go up that high?

Zilch
05-07-2005, 04:35 PM
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=47093&item=7321256732&rd=1

Tom Loizeaux
05-09-2005, 07:11 PM
Thanks for the replies so far, but I still need to know what impedace I sould use for the 2402s in order to calulate the high pass filter values.
It's listed as an 8 ohm driver, but I've heard it's really 16 ohms at the useable frequency. Can someone tell me what impedance number to use for these calculations?

Thanks,

Tom

Zilch
05-09-2005, 08:28 PM
I think I'd call this first NIB 2402H 8 Ohms if crossing at 3-5 kHz, 8.5 Ohms if above that.

Second one'd be 8 Ohms all the way.

Mills 8-Ohm non-inductive resistor, for reference, would be 7.85 Ohms +/-, actually.

[Sorry, new toy.... ;) ]