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frosting on the pi [message #38165] Wed, 04 September 2002 09:21 Go to next message
tdc is currently offline  tdc
Messages: 34
Registered: May 2009
Baron
The JBL tent sale has 2402H drivers with 16 ohm 2405 diap. This per tech support is good for 6500 to 21500 cps. If I get an extra pair for the 4 pi (pro with Jbl drivers and a 2345 horn) where would one bring it on board (cross over point) tdc
Re: frosting on the pi [message #38168 is a reply to message #38165] Wed, 04 September 2002 12:31 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18783
Registered: January 2001
Illuminati (33rd Degree)

I'd remove the compensation circuitry from the 2426 and crossover to the 2402 somewhere around 6.5kHz - 8kHz.

Re: frosting on the pi [message #38170 is a reply to message #38168] Wed, 04 September 2002 13:23 Go to previous messageGo to next message
tdc is currently offline  tdc
Messages: 34
Registered: May 2009
Baron
Wayne, you mean you and others did all that series-parallel explanation to me for nothing! I guess I could enter the resistor necklace in a art show. Seriously, if I lose the necklace would I use a first order both ways at 8000 cps. tdc
Re: frosting on the pi [message #38171 is a reply to message #38170] Wed, 04 September 2002 15:25 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18783
Registered: January 2001
Illuminati (33rd Degree)

You might keep the tweeter's compensation cable assemply; That way, if you ever want to put it back and run the system that way again later, you'll have it built and ready to go.

Re: frosting on the pi [message #38172 is a reply to message #38171] Wed, 04 September 2002 15:29 Go to previous messageGo to next message
tdc is currently offline  tdc
Messages: 34
Registered: May 2009
Baron
Wayne, I intended to keep it and try both arrangements. How could I sell anything it took so long to fiqure out. I still wonder if you have a recommendation about the slope for the 8000 cps x-over? tdc
go with jbl's advice and [message #38173 is a reply to message #38172] Wed, 04 September 2002 15:57 Go to previous messageGo to next message
Sam P. is currently offline  Sam P.
Messages: 307
Registered: May 2009
Grand Master

cross using a 12dB/octave filter. Remember, those tweets are described as "tight pattern control, deep penetration, and extremely high ON-AXIS sensitivity". Your upper freqs are going to be in a narrow 40 degree beam...is that OK in your listening situation? Might want to look for some 2404's (the baby cheek tweets) that are wider dispersion. A search at HUG for jbl 2402 will also turn up some suggestions from previous users, IIRC. Sam

Re: go with jbl's advice and [message #38174 is a reply to message #38173] Wed, 04 September 2002 16:10 Go to previous message
tdc is currently offline  tdc
Messages: 34
Registered: May 2009
Baron
Thanks. I didn't know JBL had suggestions but will look for old posts. The narrow pattern is something I was concerned about. The Coral bullet ( H-70) in my Hitachi Hs-500 is equipped with a set of fins to spread the sound field. That idea was also used with the JKL potatoe masher so I thought I would give it a try.tdc
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