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In Reply to: What's the obsession with dispersion? posted by Dominic on January 26, 2007 at 17:52:47:
Dominic, you stated that "Just because a certain design wil beam doesn't mean it won't sound good, or right for that matter."Your statement ignores the biggest dispersion problem in speakers. The biggest problem isn't beaming. The biggest problem is that there is a unnatural transition from one driver to the next. For example, if you have a 2-way speaker using a 1" tweeter and a 6.5" midrange, their dispersion patterns will vary dramatically.
In fact this is one of the reasons why full-range speakers DO sound good. The dispersion narrows at high frequencies, but it does so gradually. This is also true of minimonitors. For example, a speaker that uses a 4" woofer and a 1" tweeter.
Follow Ups:
Perhaps my impression of the topic has been skewed due to just that. Being used to single driver or coaxial setups.
Maybe that's why my recent acquisition of a pair of JBL two ways threw me upon first getting them home.
Perhaps it's easy to assume that having the drivers directed at a certain nullpoint will equate to even coverage within the listening volume.
"In fact this is one of the reasons why full-range speakers DO sound good."Well in so far as they sound good, you know, good except for poor bass, poor highs and poor dynamics but other than that.... But hey, we have "coherance".
'sworth more than you think
Well we all have our own priorities Dom and I respect another guy's even if I don't like them, you know what I mean.I have fiddled with single-drivers---there was the GE stereo record player I had when I was a kid.....seriously I have played with EV SP8s and Fostex FX-120s and heard the single-driver rigs of many pals. And some have sounded pretty good but none would ever do it for me in the long run, they can't pass the Ben-Hur test.
Ben Hur-age.I was thinking about that kind of macro ability. I got a new cartridge recently that put a lot more grunt into the macro dynamics than i'd been used to with vinyl.
I noticed it even running the puny philips, which with 40w behind them at something like 97dbw IIRC with super light moving mass could grok the dynamics in the sense that the large scale transients would have something behind them if not actual air displacement. Something like running a supercharger on a long stroke small inline-four i guess. My problem with the big speakers (drivers and crossovers, not cabs) has always been the turbo lag effect, unless you have really powerful amp you just plain have a lot of moving mass that doesn't want to start. I guess damping factor sure helps with heavy cones, something like an anti-lag system. I guess what i've been looking for is more the small displacement naturally aspirated V8, light and balanced, and if done right plenty strong. In speaker terms i'm not sure what that is, but it has maintained my soft spot for really large compression drivers and 12" ish coaxials. I really like to stick with the integration/coherence/wholeosity and i think that's the Naturally aspirated bit/midrange driver based. If any of that makes sense.
Some people like their 4884 Pacific steam locomotives.
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