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Multi-Way Conventional loudspeakers with crossovers

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Old 4th March 2019, 12:30 PM   #2641
MITsound is offline MITsound  Canada
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Quote:
Originally Posted by Rewind View Post
Oh, heil no!

Interesting choice of woofers. I always liked the aluminum dust cones in my (ported) JBL woofers. I think it adds a little distortion and a little more detail than typical JBL 2225H.
I think metal woofers and mids play cleaner, below their resonances/ breakups than paper or plastic.
My 2" Dayton domes play very cleanly from about 600hz to 4000 Hz, really revealing what was upstream of them, while a similarly flat responsed Alpair 12P kind of prettifies everything.
But any makeup is a mask of sorts.
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Old 4th March 2019, 12:52 PM   #2642
TNT is offline TNT  Sweden
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Originally Posted by xx3stksm View Post
I don't have 18LX60 but have experience with another 18-inch unit 18G40, SM118/N and 18P80/Nd in open baffle operation. They sound excellent though my experience with a DIY speaker is only open baffle. I love their natural sound probably brought by no enclosure(woofer cone doesn't have air pressure). My open baffle isn't inside my listening room but at the border between the next room. This setup forces you to be a carpenter rather than an engineer. But you have the advantage of full usage of potential bass. It's not for a commercial product but for DIY use only because you need to sell both an open baffle and a house.
And no floor bounce

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Old 5th March 2019, 10:29 AM   #2643
xx3stksm is offline xx3stksm  Japan
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A skillful carpenter dominates SQ, IMHO.
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Old 6th March 2019, 11:35 AM   #2644
Kjeldsen is offline Kjeldsen  Denmark
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Quote:
Originally Posted by xx3stksm View Post
I don't have 18LX60 but have experience with another 18-inch unit 18G40, SM118/N and 18P80/Nd in open baffle operation. They sound excellent though my experience with a DIY speaker is only open baffle. I love their natural sound probably brought by no enclosure(woofer cone doesn't have air pressure). My open baffle isn't inside my listening room but at the border between the next room. This setup forces you to be a carpenter rather than an engineer. But you have the advantage of full usage of potential bass. It's not for a commercial product but for DIY use only because you need to sell both an open baffle and a house.
Isn't this rather IB than OB?
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Old 7th March 2019, 04:25 AM   #2645
xx3stksm is offline xx3stksm  Japan
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I don't know much about speaker theory. If IB means infinite baffle, my setup is probably IB rather than OB. My preference for OB mainly comes from its natural sound which is, I'm sure, brought by no pressure on the backside of the woofer cone. From such viewpoint, IB and OB are the same categories for me. Sealed enclosures are not. Quasi IB by an adjoining room is better than OB which has an inherent lack of bass. You can have an additional boost on bass by multi speakers. Four speakers is excellent to achieve natural bass. It can act as equalizer from 150Hz where each speaker becomes to have the same phase while more than 150Hz is at random(no boost occurs). If you are a carpenter, you can utilize an adjoining room and build a large room which is necessary for multi speakers. An electric engineer(it's me) totally can't overcome a carpenter in SQ.
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Old 18th March 2019, 02:04 PM   #2646
MITsound is offline MITsound  Canada
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I've had my fun with the Van Halen planar dynamic hybrids, but was missing the transient snap of my horns.
Plundered my Onken cabinets, and am trying no baffle for now, as the Van Halens can be modded for a slob sub.
So far so good; the 2 Celestions are quite good without a baffle, as long as they're close together.
This pic was from this morning, prior to me mucking things up with wire.
I may post if I figure a way to do that neatly.
Maybe the easiest build I've ever done, and I think the no stain no oil no finish gets the steampunkish mancavd look I was aiming for.
Loving the exaggerated dynamics and colourations. The BG stuff is great, but horns are the fun date.
Pretty happy with this design, so I bought some nice Acacia lumber,to redo the open frame.
I realized I have 4 four ohm and 2 eight ohm 1525e in house, so now the upper woofers are 8 ohms,wired in parallel with 2 series wired 4 ohm woofers,which are bolted together,clamshell.
Things are a little bit cleaner sounding, and the soundstage more 3D like this
The remaining two 1543 woofers will be for distributed deep bass , in one or two existing Onken cabinets.
Putting the clamshell-isobaric in ruined the blend with my old Polk or diy Dayton RSS 265HF-4 Subwoofers.
Pics next week, with the new frames.
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Old 1st April 2019, 04:06 PM   #2647
Leonidas is offline Leonidas  Netherlands
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Just some experiments I did on OB

I did the Leonidas XO for PAP and try to test as many FR drivers as possible.

Also tried many 15 , 12 , 10 inch woofers.

After over 50 years diy speakers , OB is , for me , the way to go !!

Hope you all have fun and.......enjoy the music

Leon
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File Type: jpg Altmann Aproach OB.jpg (54.6 KB, 690 views)
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File Type: jpg P1050063.jpg (362.6 KB, 186 views)
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Old 9th April 2019, 07:06 PM   #2648
Godzilla is offline Godzilla  United States
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Beautiful work Leonidas. Thanks for your dedication to OB. I prefer it as well.
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Old 10th April 2019, 07:11 PM   #2649
bzfcocon is offline bzfcocon  Romania
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Here's the current incarnation of my hybrid speakers: OB bass + point source coaxial mid-high. It might inspire someone looking for a high-WAF OB (at least my wife is happy..)

I've got the idea to use the KEF HTS3001 sattelites from Patrick Bateman in the snytrip thread - takin the opportunity to thank him here ! The UniQ coaxial is really, really good and clean. I believe combining them with OB bass is a very effective way to get a great sounding speaker.

Some technical details:
- OB is Eminence Beta 15A in a "wedge"/Y baffle, helped by Graham Maynard's (RIP) T-Bass circuit published on this forum
- crossover at ~250 Hz LR2 (miniDSP) + room EQ

The KEF coaxials are replacing my Visaton 6xFRS8 + NEO3 PDR array panels (OB). As with most things in engineering, this is a step down in terms of naturalness and authority of vocals, but a step up in terms of imaging and resolution (plus much smaller size). At the moment I am happy with the result.
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File Type: jpg IMG_20190409_221834.jpg (298.6 KB, 177 views)
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File Type: jpg DSC05594_sc.jpg (707.7 KB, 191 views)
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Last edited by bzfcocon; 10th April 2019 at 07:24 PM.
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Old 10th April 2019, 07:23 PM   #2650
pcgab is offline pcgab  United States
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Those look awesome!

I love the angled back setup on the 15a's.
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