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Old 3rd April 2013, 01:42 AM   #11
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Hi batsong,

I put together a comic "audio illusions" tale(bottom) for people who are not married to one faith like you.

"System runs on 2a3's ... "
"...have an updated Dynaco ST70 for bi-amping"


I would ... DEFINITELY bi-amp! (and start a new thread in multiway forum)

I would ... start with a sketch of my listening room with a few furniture placement options. Can you use the corners for gain and controlled directivity? Up against the wall for bass gain? Do you want audio magic for one, for your family? Where is your HT LCD display?

I would ... download Diffraction & Boundary Simulator 1.2 AND Room Response Calculator v0.6d by Yavuz Aksan and run some simple room effect simulations.


"System runs on 2a3's, mainly vinyl ... " == your audio religion == my ears are the microphones == remove power hungry room ambience effects == BIG HORN ... maybe unity horn if you are really smart ... maybe coaxial compression driver like BMS 4590 4592 if you want the Big Easy ... maybe one BIG LeCheach horn if you are socially COOL == accept that the 2a3's do not have enough power to create useful room ambience from 2-Pi room radiation.


"...have an updated Dynaco ST70 for bi-amping vinyl and I am cheap" == two low cost BIG woofers wired in parallel in a BIG ported box. Horn woofers are really, really, really BIG, and have very irregular SPL/freq response.

See you in the multiway forum ... LineSource

===========Comic Relief=========
"Do you feel lucky Punk?"

Everytime I purchase a new CD I remember this line from the Dirty Harry movie.
Stereo recordings are only a BIG FAKE ILLUSION.
The sonic quality and stereophonic presentation of each recording is a gamble.

When you bring questionable recordings and fake audio illusions into your home, your selection of speakers and room conditioning offer several very different options for the presentation.

1) Do you want to hear what the microphones hear? Horn speakers, especially converged entry unity horns and corner speakers, are good for this presentation. Many classical recordings use just two orthogonal mikes which match well with controlled polar pattern horns.

2) Do you want to add some auditorium ambience? Box monopole speakers with flat frequency response and controlled directivity can do this. Most of the 80-1100Hz vocal range can be covered by one speaker propagating into 180 degree 2-pi space. ENERGY into the room which generates new reflected "you are there" ambience illusions.

3) Do you want the illusion of the musicians playing in your room? Dipole and caridiod speakers can do this. Adding diffusion panels on the front wall behind the speaker improves the "they are here" illusion.

4) Do you want to play conductor? Nearfield listening of large linesource dipole planars like BG75, Magnepan and Apogee blend the microphone directness with stage ambience, similar to what a conductor hears.

a) TRUE THAT ... most POP recordings are MIX'ed in close mic'ed small recording studios, and heavily compressed to generate hormones with IPOD earphones. JohnK/Linkwitz 4-way dipoles are getting love because they add some realism to compressed POP.

b) TRUE THAT ... UP AGAINST THE WALL. ... there are 7 Billion people that dream of a Flat Screen TV on the wall and a pair of tall, narrow, stereo speakers. Tweeter waveguides are getting love for controlled directivity.
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Old 3rd April 2013, 02:21 PM   #12
batsong is offline batsong  United States
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A lot of very good suggestions, and very different from what I was able to come up with . Thank you very much!
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Old 7th April 2013, 08:07 PM   #13
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Quote:
Originally Posted by Scottmoose View Post
Then since dynamic range is your thing you need to go with the multiway option; dedicated HE woofers with compression mid-tweets.
Agreed. Much as I love my two different full-range speakers (half-Changs and uFonken), they can't do justice to some of the material the OP will play. This sounds like for Econowave.
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Old 9th April 2013, 01:35 AM   #14
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batsong,

Research at Harvard has proven that you can increase both the quality of your life, and your Lifespan if you just PHYSICALLY SMILE 5 times per day.


My wife and daughter play piano where the low A is 27.5 Hz. Teach your children well ... about real music.
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Old 9th April 2013, 03:38 AM   #15
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Yup, sounds maybe like Wayne's stuff, or Econowave (Deluxe HO or SR variants maybe -- Flex Your PCD Mettle:), or 18-sound kits, or maybe diysoundgroup (fusion-tempest maybe) kits. No-affiliation with any of them, btw. Depends on sensitivity vs. cost. Many (most?) of those things, as-constituted, will need help in the bass. If, OTOH, you can tolerate ~half-refrigerator-sized boxes, you can get a bit more bass w/o the help. I would guess that if you're going to 45's, 98 would be as low as you'd want to go--probably 100-ish is where you want to be (??). That narrows things quickly. Cornscalas are still in that area, I'm guessing. Could diy some Jubilees if the money works (but those horns are quite dear). If you have corners for a basshorn, that might simplify your choices, too.
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Old 9th April 2013, 06:26 AM   #16
batsong is offline batsong  United States
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Quote:
Originally Posted by LineSource View Post
batsong,

Research at Harvard has proven that you can increase both the quality of your life, and your Lifespan if you just PHYSICALLY SMILE 5 times per day.
It's like you know me, LineSource...

Lot of great ideas here. I do need 98+db efficiency, but can biamp for the bass.
The Unities are really interesting, but also complex. Though it seems that a compression driver and big woofer combo might be the way to go. My system has been bass shy for years, and am hoping that this build will rectify that, even if it means large speakers.
Honestly, I am hoping for something with a little visual impact as well. This system is all about fun and relaxation.
Thanks again, everyone.

Last edited by batsong; 9th April 2013 at 06:30 AM.
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Old 9th April 2013, 06:42 AM   #17
batsong is offline batsong  United States
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Jubilees and Altec A7 and the like are really cool, but my room may be too small to take advantage of such designs. Maybe a mini version?
Those Synergy horns with the array in the single horn looks perfect! I like the idea of mounting the bass driver concentrically with the mids and compression driver. I wonder how large of a bass driver I could fit?

Last edited by batsong; 9th April 2013 at 06:47 AM.
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