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Multi-Way Conventional loudspeakers with crossovers

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Old 30th August 2012, 05:27 PM   #7941
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Just checked out the first page of your thread. Looks very nice
Have you tried changing the response from gradually falling to gradually rising
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Old 30th August 2012, 05:37 PM   #7942
vgeorge is offline vgeorge  Greece
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Have to check my measurements, but as far as I remember the GPA couldn 't reach more than 12K, and it was ugly after 10K.
Mind you the measurement was from listening position about 4 meters away with both channels.
As there is no attenuation on the super tweeter, I am limited my it' s sensitivity.
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Old 30th August 2012, 05:39 PM   #7943
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OK. It makes complete sense then.
I have not heard the GPA compression driver, the Radians I have heard tend to be very good in this regard

Last edited by Melon Head; 30th August 2012 at 05:43 PM.
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Old 30th August 2012, 05:45 PM   #7944
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Maybe the Radians are better up high. Have not heard the Radians.
That' s why I mentioned that I used the GPA drivers.
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Old 30th August 2012, 06:09 PM   #7945
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without doubt, your setup kicks butt
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Old 30th August 2012, 08:15 PM   #7946
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Dual 15" woofers or supertweeters; it's not an either/or choice. A system like this isn't built to price point: it costs what it costs, and you stop when you're satisfied with the sound. The high-end commercial equivalents are already at the $60,000/pair price point, or higher.

The choice of single versus dual versus horn-loaded woofers mostly comes down to available space. The smaller the room, the less you need the headroom, and the larger the room, the more acoustic watts you'd like to fill the space. A New York or Hong Kong studio apartment is probably too small for any of these variants. Multiple or horn-loaded woofers would be fine for a 500-seat movie theater; that's what Altec sold for neighborhood theaters back in the 1950's, and movies were plenty loud back then. If I had the space for a pair of 9-cubic-foot bass cabinets, I'd certainly use dual GPA 416B-Alnico bass drivers (mostly likely in a side-by-side configuration).

Vgeorge, that's a nice system, and a well-worked-out crossover. You have the satisfaction of knowing it'll sound better than just about anything at an audio show - not only that, the non-audiophile recordings sound great! You may have already found that movies from the 1950's and 1960's have a "rightness" on Altec speakers - not surprising, since that's what was used during the mixdown and audience previews.

Last edited by Lynn Olson; 30th August 2012 at 08:20 PM.
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Old 30th August 2012, 08:35 PM   #7947
vgeorge is offline vgeorge  Greece
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Thank you very much for your comments Lynn!
I would never build a speaker like this if it was not your inspiration.
Now, got to find and listen to more music from 50's and 60's movies music...
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Old 30th August 2012, 10:14 PM   #7948
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Thanks for the graphs, Lynn. They do look great and are hard to argue with. No EQ needed there. Yes, there is a certain openness and naturalness to large format drivers that is seductive. Like electrostatics, but with better dynamics and imaging (on the right horn). Sounds like real music.

I personally don't care about content above 15K - I can't hear it in music. Cut much lower than that, and strings start to lose their warmth.
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Old 31st August 2012, 02:26 AM   #7949
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Has anyone built or heard the Beyma FR15A/2 loudspeaker? Looks ok
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Old 31st August 2012, 04:20 PM   #7950
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Lynn

I'm considering travelling to RMAF to audition the LTO sound. Since that's the main reason for attending, it would be nice to know the likelihood of the LTO being there for demo. Would you say there's a likelihood of 80 or 90% at this point?

Understanding full well that there is always a chance for a last minute LTO cancellation at the show, airplane flights might be cheaper if purchased sooner rather than later.
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