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Jack Bouska's LLDIYHIFICircle Home Meeting


Held on: Saturday, 12 May 2001

Special thanks to Paul Winser for providing photographs of the event.

Question: How can you determine the turning point when you start to get "really serious" about participating in Circle activities?
Answer: When you start thinking to yourself "it's time I hosted a home meeting"!
Honestly, I swear I was thinking that very thought, just prior to a half dozen of the membership individually asking me when I was planning a home meeting.........
The real benefit, for the host of such an event, is that once a date is announced, it provides considerable impetus to tidy up those nagging loose ends, or half started projects associated with the sound system, before the hoards of critical ears arrive at one's doorstep.
Festivities started at 10:00am
Anything less than 10 hurts, (oops what I meant to say is that lowest frequency that my system can produce is 10 Hertz! (see graphs below)
My tri-amped system does not lend itself easily to mix and match component swaps, so I did not accommodate anyones outside home built gear to audition. However most people did feel free to bring some examples of their favorite recorded music. Well mastered CD's were revealing, but I didn't play any records. (My LP12 is still boxed up and in storage back in Canada, with the 110volt 60hz motor.)
I also held a brief demonstration of a bog standard system vs. a wide dynamic range system. (Classic David and Goliath battle)
Why should anyone have attended, you may well ask? The answer is simple: this current system is probably the widest bandwidth, highest dynamic range audio home system available today. ( it spans 11 octaves from 10hz to over 22khz, capable of 130db on peaks.)

Some of the LLDIYHIFICircle club members who attended the event.


(click image to see larger version) Twenty club members in the picture, about a half dozen others attended throughout the day.



A rare picture of me, engageing in SORCERY

(click image to see larger version) Advice for any home meeting, always say a few magic incantations over the system before running any type of demo. Note the Infinity speakers (with EMIT tweeters) are perched above the larger JBL/TAD floor standing main speakers)



A gallery of images of the equipment in play on the day

(click image to see larger version) Life size audio.



(click image to see larger version) The buisiness end of the big Altec transmission line woofers



(click image to see larger version) The Tad 2002, and Oak horn, offset for time alignment with the pair of 10" JBL 2123 midrange drivers.



(click image to see larger version) The equipment rack (all 3kW of it).
Top to bottom:
Home grown Preamp/active filter/bass-boost
Bush DVD player
Carver 220W amp, driving TAD tweeters
Hafler XL600 500W amp, driving 4 10" JBL midranges
1st Bridged Crown DC300A 750W amp, driving right Altec woofer
2nd Bridged Crown DC300A 750W amp, driving left Altec woofer



(click image to see larger version) The speaker system uses a combination of low level active filters, ahead of the amps, and high level passive filters, between amps and speakers. All this requires a whole lot of thick guage wire, and lots of connectors, as this photo attests.



Comparison measuements of the two systems in head to head competetion.

(click image to see larger version) infinity vs tad, measurements prior to holding a brief demonstration of a bog standard system vs. a wide dynamic range system. (Classic David and Goliath battle, but you get to be the judge.)



(click image to see larger version) infinity vs tad



(click image to see larger version) infinity vs tad



(click image to see larger version) infinity vs tad



(click image to see larger version) infinity vs tad




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