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In Reply to: this week's OB experiments and conclusions posted by nl on February 11, 2007 at 14:21:10:
with low-level CR cascaded - will one get generally good enough slope for 100Hz xover blend?some genre or folks like a lot of midbass power and this could compromise FR limits vs a large front load horn system (or even my karlson)
transitions in some coaxial to compression driver & their horn can be a problem.
open baffle and single drivers can be nice and sometimes less fatiguing than multiway. I like CH250 so far with harpsichord although missing some fundamentals.
a nice ringy 511 might work for Bon Scott (?)
Follow Ups:
When I am in Tokyo I go have a listen at Hino Audio where you can try a wide range of famous speakers. All of the horn systems have that crossover discombobularity in the midrage -- and I'm talking about mega-classics like Tannoy Autographs, JBL Paragons, Urei-modified 604s, etc. You don't really notice it unless you hear a fullrange driver side-by-side, and then the multi-way sounds like it has marbles in its mouth.These experiments make me particularly interested in systems which avoid crossovers in the 300-4000hz range. I have a set of 1936 Western Electric 200hz horns with drivers. They go up to 5K or so. Also, the BMS coaxial compression drivers are intriguing because they go down to 300hz but on the upper end cross at about 6kHz, instead of the 1500hz or so that is common.
Another interesting approach would be to use larger FR (wideband actually) drivers for the 100hz-6000hz range and cross to a tweeter around 6K. Then you could use something like a 12' no-whizzer driver, and I have my eye on the Tone Tubby drivers for this purpose. That would give you a lot of midbass-midrange power and efficiency for larger-scale music, but maybe preserve most of the merits of the FR approach.
Please let us know if you go the TT route for experiments. I am looking hard at the 12 Alnico TT. I run B200 w/ 80hz & 150hz PLLXO 1st, with active OB bass @ 150hz 4th. Cantus G2 at .22uf single cap,.. rotation of very small SET's & PP 300B for FR's. Yep those TT's look very intresting, even the 10's..
Just a thought. Dual drivers would seem to give better power handling, but I have no idea if they would cause more problems than they would solve--interference effects, etc?I've done no searching--I can't imagine this is a new idea. Price wouldn't seem prohibitive, so I'm imagining there's another downside.
Best,
"Another interesting approach would be to use larger FR (wideband actually) drivers for the 100hz-6000hz range and cross to a tweeter around 6K. Then you could use something like a 12' no-whizzer driver, and I have my eye on the Tone Tubby drivers for this purpose. "Hmmm... They look neat on the webpage, and could certainly handle power, but I see no frequency response graphs. I wonder if flat response is important for a guitar speaker?
For another, less burly candidate, how about the Fostex FF225K? That certainly has flat, whizzerless response in the 200-10Kz band. But would it offer more dynamics than your Fertin (sp?)? Maybe not?
I sure like the idea of a single driver for the vocal range.
pusning 12" up might have anohter set of tradeoffs - wonder how T-Tubby's 12" ceramic speaker fares vs their alnico? - its $120 (ebay 220079453842) - -Eminence's 10" lil buddy is $55 (fs~140)
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