Speaker Asylum

6k XO is awful high

68.5.163.56

badman

R

In Reply to: RE: JBL123-A/Klipsch 400 speaker build HELP posted by Cosmickat on July 28, 2012 at 21:12:15

It's a lovely wideband driver but 6k is REALLY pushing it. And 100WPC should be requisite for them, though 50WRMS is what they're rated for (Unless it's a serious 50WPC).

You have a VERY narrow dispersion in the band key to imaging- 1k-6k, since it's laserbeam from the driver by 2k

I'd start with the crossover and go from there.

Bass is supposed to sound big. 6.5" is not a woofer size.

Follow Ups:

RE: 6k XO is awful high - Cosmickat 22:02:10 07/29/12 (4)
Hi badman, your probably right on both counts. The crossover point is easily remedied though, with the electronic xover, and I did start at the recomended 4k, but as you say the123A has a lot of sweet music in the 4.5-6k range, and I'm thinking 100w per channel at least for more bass. Do you happen to know min/max cabinet size for this driver? I've heard 3 cubic ft in a sealed box is a winner, but I have around 5 cu ft...is the cab too big for this driver, and is this the main reason of not enough bass?
- You'll get the impression of "More" in 3cu ft - badman 09:15:36 07/30/12 (1)
  Which you can do just by loading some bricks into the existing cabinet. You'll have more midbass at the expense of the deepest stuff- which is probably a good tradeoff.
  
  Bass is supposed to sound big. 6.5" is not a woofer size.
  - RE: You'll get the impression of "More" in 3cu ft - Cosmickat 12:17:33 08/01/12 (0)
    badman, thanks I will spend some google time looking into ALL this GOOD STUFF!
    
    Cheers,
    
    Cosmickcat
- RE: 6k XO is awful high - Cosmickat 08:43:38 07/30/12 (1)
  Hi badman, just to clarify, The 123-As are going through the Urie 535 electronic xover at around 450-600Hz NOT 6000K sorry my mistake.
  - Ah, that's a better point - badman 09:09:47 07/30/12 (0)
    But now you're too low- asking too much from the horn on the bottom end most likely, and you'll get a better directivity match around 1200Hz or so.
    
    Take a little google time with "econowave" and you'll see some utilization of the 123a in 2 way horn systems, and some idea of directivity matching.
    
    Bass is supposed to sound big. 6.5" is not a woofer size.

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