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Multi-Way Conventional loudspeakers with crossovers

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Old 1st October 2012, 09:55 PM   #261
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by tinitus View Post
it does look really good with its small 3" voice coil, and single spider
tried a calculation
hard to squeeze much deep bass out of that one
maybe 0.27 Qts is a bit on the low side to do ordinary vented BR
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Old 1st October 2012, 10:13 PM   #262
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Quote:
Got any pro setup pics?
The reall large stuff is seldom for installation, its on the road, but the tings i really like doing: here´s just a few, most pictures at the jobserver and i seldom remember how to log in from here, will put a few more up tomorrow, there should be some build pics of the large stuff too.

This, PM-4, might be my absolute favourite realy small speaker, designed for use on wall or very close.

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Old 1st October 2012, 11:39 PM   #263
tinitus is offline tinitus  Europe
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if you want something really BIG, and crazy, try put the Fane Sovereign 18-500 in 600 liter sealed
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Old 2nd October 2012, 03:11 AM   #264
Pano is offline Pano  United States
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Quote:
Originally Posted by JRKO View Post
The JMMLC looks like a baby birds beak
But of course! That's where you put the ....
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tweeter.
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Old 2nd October 2012, 10:56 AM   #265
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This is an installation a like a lot.
A fairly large hall in the citizens house in a small village on the westcoast.

Click the image to open in full size.

This is used most days of the week, dance, live music, movie and theatre.

Place is run on a non commercial basis so budget wasn´t unlimited.

The speakers each side of stage, this is during installation, are TQWT´s pipe length a bit above 200cm, ML with port downwards close to the wall.
LF unit Beyma 12G40 and HF Beyma CD10Nd.

Halfway on the sidewalls smaller monitors with same LF and Beyma CP25.

Click the image to open in full size.

Lurking under stage is a 350cm subhorn with Beyma 15LX60.

Click the image to open in full size.
3x Peavey PV2000 driving, Peavey processor for x-over and delay to time align speakers.

Sounds really nice, like a big home setup buth with brutal power and nice acoustics in the hall.
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Old 2nd October 2012, 01:15 PM   #266
palmas is offline palmas  Portugal
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Quote:
Originally Posted by ingvar ahlberg View Post
I also like large drivers and still believe that You cant beat qubic inches.

But, i don´t like x-overs, especially if they´re used in the fundamental voice region, say 300-3kHz.

This means i have to use LF drivers that are very good in the voice area, 10-12" is, in my opinion, the best choice for this.
We still want the fantastic low level dynamics that large drivers deliver, what to do?

First try, turned out really ok, was this:

Click the image to open in full size.

A tiny litle speaker that actually is allmost a 2-way design, the larger of the round parts is a Beyma 21L50, this ,unfortunately out of production, 21" driver is lowpassed at about 85Hz, the smaller round thing is a Beyma 10G40, only lowpassed at about 3k, firing backwards in what could be regarded as a TQWT but with exponential expansion.

The square thing is a Beyma TPL150, AMT driver, system sensitivity at around 100dB and fantastic low-level dynamics.

It moved furniture at pretty modest levels so the 21" was perhaps a bit too large for our livingroom.

What to do then?

Ingvar
I can still get a dozen of 21L50, new. In fact I'm picking up a pair next saturday...
Could you be so kind as to share the details in the wonderfully looking speaker?
Thanks
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Old 2nd October 2012, 05:34 PM   #267
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Quote:
Originally Posted by Pano View Post
The multi-cell look wonderful, wonder what the final price will be?
Pano, can you recommend any good reading on multicellular horns? How do they sound compared to CD horns, the Iwata etc?
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Old 2nd October 2012, 05:40 PM   #268
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Quote:
Could you be so kind as to share the details in the wonderfully looking speaker?
Ofcourse, generally all information and drawings on my speakers are free to all diy friends.

The MOC speaker starts with, from the bottom, a vented box for the 21L50, inner volume roughly 345L, box in 18mm birchply, quite a lot of bracing and all inner surfaces clad with 13mm gypsum, glued and screwed, then clad with 12mm tretex, glued and screwed.
Baffle is 36mm birchply.
Port is 720 sq cm and 350mm long.

Why use a 21" driver?

Oh, You´ve forgotten:

Click the image to open in full size.

The upper part ( unfortunately not detachable, the idiot designing it built it one box, weighing 118kg, we realized this was a mistake the first time we carried them 2 stares up) is a folded TQWT with stepped expansion and ML port.

More soon, asked to make som dinner now.
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Old 2nd October 2012, 08:01 PM   #269
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Quote:
we carried them 2 stares up
That we didn´t do, we carried them two stairs, or floors up.

The upper part has a lot of angled panels, unfortunately different angles so they meet in a rather complex way at joining surfaces.

To cut these You need the latest high tech macinery.

Click the image to open in full size.

Click the image to open in full size.

Drawings should be around here, somewhere, if not i´ll redraw them if anyone wants them.

Mind You! In normal domestic conditions they need adaptive active bass controll.

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Old 2nd October 2012, 09:06 PM   #270
Pano is offline Pano  United States
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What is it with cats and speakers? Mine love the ports on my Altecs. They love to reach in and pull out the fiberglass.
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