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Multi-Way Conventional loudspeakers with crossovers

Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
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Old 20th September 2019, 11:04 PM   #3191
Ro808 is online now Ro808  Netherlands
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Tonight, I'll have to settle for this (x2 = 4 point):

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Last edited by Ro808; 20th September 2019 at 11:07 PM.
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Old 20th September 2019, 11:33 PM   #3192
camplo is offline camplo
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Quote:
Originally Posted by Ro808 View Post
2 pairs of Sony SUP based MTMs and yes, those are 15" woofers.

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GM wants me to build this and put in my basement, average Michigan basement, maybe 8ft high lol?
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Old 20th September 2019, 11:42 PM   #3193
Ro808 is online now Ro808  Netherlands
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This batch of Sony stuff from the Sony Studios in Culver City was sold on ebay about 15 years ago for 600.00 bucks, including all the cabs.
Not bad, if you consider 1 GTS clone of the Sony SUP-T11 costs > $4000.


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Old 20th September 2019, 11:46 PM   #3194
Ro808 is online now Ro808  Netherlands
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This is what the SUP-H11 horns look like from the front:

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Old 21st September 2019, 01:52 AM   #3195
gedlee is offline gedlee  United States
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Quote:
Originally Posted by camplo View Post
GM wants me to build this and put in my basement, average Michigan basement, maybe 8ft high lol?
You live in Michigan? You should come by and hear my system.
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Old 21st September 2019, 04:18 AM   #3196
drumdoctor is offline drumdoctor  United States
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I totally agree with that suggestion. Well worth anyone’s time to hear the Geddes system.
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Old 21st September 2019, 07:09 AM   #3197
Dave Zan is offline Dave Zan  Australia
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Quote:
Originally Posted by gedlee View Post
We don't differ in principle.
I hope not. I think what I wrote reflects this.
Of course, there are differences in our requirements and cost/benefit trade-offs.
My home acoustics are different from the typical American (plasterboard construction), just for a start.

Quote:
...I actually made a 90 x 60...far more complicated to fabricate.
Can you post any pics?
I am curious to see how you fabricated and what you came up with for the throat transition, mouth shape and so on.
I assume this was a while back, these days CNC fabrication is commonplace - a CNC router to cut a foam pattern seems routine.

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Next, the lack of vertical control made the crossover situation worse in the vertical direction
This is the key, I think I can improve the vertical polars both above and thru the crossover frequency but I need to confirm this.

Quote:
In my room I simply put a deflector... which solved the problem.
When you say "deflector" do you mean absorber or reflector?
Some treatment is on my to-do list too.
But it would still be nice to have the better vertical polars, makes a more tolerant speaker and a little more efficient.
Ideally I don't want to sent sound upwards and then have to put an absorber up there to soak it up.

Quote:
Finally, it is the horizontal control that is imperative and the vertical is of secondary concern...
Yes, I commented on this in a prior post.

Best wishes
David
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Old 21st September 2019, 07:31 AM   #3198
Dave Zan is offline Dave Zan  Australia
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Quote:
Originally Posted by moray james View Post
...[W]hat would happen if rater than horizontal woofers or stacked woofers you placed..the second woofer around the corner on a side panel?
Hi Moray

In my speakers it wouldn't fit... there isn't much in the way of side panels, the box has slanted front face to aim the woofer and blend with the horn.
But I have tried to work out some alternative set ups.
Quote:
Originally Posted by camplo View Post
...what if I ran dual td15ms side by side and dual 15h side by side below the 15ms
This idea could probably be made to work well with correct crossover to match the phases and amplitudes for both on axis and nice polars.
Main problem is simply that it will be very expensive.
JBL used 4 woofers close packed in a diamond pattern (tall vertically) for some expensive cinema installations.

Best wishes
David

Last edited by Dave Zan; 21st September 2019 at 07:35 AM.
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Old 21st September 2019, 09:12 AM   #3199
daemonsgr is offline daemonsgr  United Kingdom
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So as I follow the thread almost since day one Ill ask a recap question that might help concentrate the HF options.
From the available for sale CDs if you want to crossover a 15in at a max of 800 (I would prefer less) and pay 500eur or less per side (so no cellestion 1000usd) what are the hifi (low power) top options?

Ive seen so many recommendations for different configurations that I dont know if there is a general verdict. Most CDs go up nicely to 17-18k but Im not sure which actually does a quality job up to 20k (not that my ears go over 15 but thats another thing).

Im planning to order a 4594he if I can’t get a single driver alternative.
Ill probably make a tratrix wood horn (300hz-400 size or thereabouts) for it or an 18sound as a of the shelf thing.
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Old 21st September 2019, 09:25 AM   #3200
Zvu is offline Zvu  Serbia
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Compression driver coaxial B&C DCX464, 16+16 ohm, 1.4-inch exit
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