I was on SBA website not so long ago... and my head is still spinning from all the drivers they offer...
It's a complete maze and not much in terms of description to help wade through it!
I'm really interested in their small 2.5" full range as a mid-tweet coupled with 2 of their new 5x8" woofers.
It's a complete maze and not much in terms of description to help wade through it!
I'm really interested in their small 2.5" full range as a mid-tweet coupled with 2 of their new 5x8" woofers.
Troels Gravesen joined our annual christmas lunch/party this year, with a pair of speakers that used the 9½" woofer. It's a very nice driver and for the price I do not see much competition. It played very dynamic and had lots of detail.
Ulrik who worked for Scanspeak and now help to develop SB, also attended and they sure do make alot of different drivers of great quality.
Since it was brought to my attention, you guys have actually gravitated me towards SB now .
I suspect there a good compromise between performance and price .
And a 9.5 woofer will help keep my enclosure at a reasonable width .
My paradigms have four 7” drivers each , and I’m not a big fan of drivers that small for Base and Midbase reproduction . Theoretically there would be a little more cone area with the 4x7” cones , but I find small cones can sound stressed to easily .
Two 10’s ,or close to it shouldn’t be to bad .
It’s funny ,as the best base I’ve heard was in the 80’s. I had a pair of Audio Research speakers , and they had a sealed 10” polypropylene woofer in each cabinet .
These things just kicked hard imo , but all of the sudden there would be a flash as the voice coil burnt out lol
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^So, as you are almost my age, you do remember the closed box hifi bass sound! I lost 35 years of my life listening to reflex bass, sad days!
My latest two speakers have single 10" woofers per side, closed box with some low end eq, active. No need for subwoofers, but I don't play very loud (^100dB) Double 10" would be nice, one of my diy/mod speakers has 2x8" ScanSpeak closed and it is ok too. Response with minimal group delay from 25Hz up, without reflex gives you the natural bass.
SB Acoustics give best value now, and some very good models in Satori line. My latest have SBA 29NRX75-6 woofers which are really good. I haven't heard the new WO24, but it has actually 8" cone diameter, 29NRX has 9½", 255 vs 312cm2. Linear travel alike 17 vs. 22mm, so NRX has almost double the air displacement capacity of WO! And NRX is cheaper too.
My latest two speakers have single 10" woofers per side, closed box with some low end eq, active. No need for subwoofers, but I don't play very loud (^100dB) Double 10" would be nice, one of my diy/mod speakers has 2x8" ScanSpeak closed and it is ok too. Response with minimal group delay from 25Hz up, without reflex gives you the natural bass.
SB Acoustics give best value now, and some very good models in Satori line. My latest have SBA 29NRX75-6 woofers which are really good. I haven't heard the new WO24, but it has actually 8" cone diameter, 29NRX has 9½", 255 vs 312cm2. Linear travel alike 17 vs. 22mm, so NRX has almost double the air displacement capacity of WO! And NRX is cheaper too.
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It would be nice to find a woofer that sounded good in a sealed enclosure.
Would be less complexity also, although thats not really an issue for me .
I’m aware sealed doesn’t go down as low , and I’d be willing trade off a little bit of output to have a larger sealed enclosure to get them down a bit lower.
I’d be running subwoofer regardless to support the frequencies below 40 hz .
When running dual sealed woofers in the region of 25-500 hz , I’m wondering if having them in separate enclosures would be best?
I’m thinking that maybe the waves from each sub could possibly interfere with each other , although I believe having several woofers in the same enclosure is quite common .
It’s certainly not a lot of additional work to have them separated from each other
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Here is a nice driver from TYMPHANY that you might consider......the Vifa NE 180W-04. It's a 6.1/2" woofer with a remarkable midrange and a low distortion profile that is not too expensive for the pocket. Used as a midrange driver in an O.B design crossed around 200 -300 c/s and 2Kc/s would be audibly stunning.
C.M
Vifa NE180W-04 | HiFiCompass
Peerless by Tymphany NE180W-04 6-1/2" Full Range Woofer
C.M
Vifa NE180W-04 | HiFiCompass
Peerless by Tymphany NE180W-04 6-1/2" Full Range Woofer
I believe I used Vifa drivers many years ago in a car audio install with great success
Not great at the abbreviations and acronyms yet. I suspect OB is open baffle? Does that mean no enclosure , as the speaker is merely secured to a front baffle and open in the rear to the room?
Not big on that idea
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According to John Lenard Burnett, closed boxes is not that big a problem, since you will need more drivers to cover the full range anyway.
Crossovers: Basics
SB-drivers are good, but you should also be able to find great PA drivers that should cover your needs, if high SPL is something you would like too.
Crossovers: Basics
SB-drivers are good, but you should also be able to find great PA drivers that should cover your needs, if high SPL is something you would like too.
I refuse lol
Not concerned with spl . Want amazing stereo SQ .
I do find more drivers working less hard can keep distortions down
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Hi Major
I also will be building a speaker system; my amplifier is a triamp so I will not need any crossovers.
Presently using 2 pairs of kef speakers until I sort the new speakers out.
Not sure what bass units to get; the price range is quite amazing.
Was thinking of designing the bass cabinets separately with mid and treble in separate cabinet.
Even with the kef speakers the system is quite amazing.
I also will be building a speaker system; my amplifier is a triamp so I will not need any crossovers.
Presently using 2 pairs of kef speakers until I sort the new speakers out.
Not sure what bass units to get; the price range is quite amazing.
Was thinking of designing the bass cabinets separately with mid and treble in separate cabinet.
Even with the kef speakers the system is quite amazing.
I’m kind of disappointed I sold all my Marantz and went with Anthem , as all I had to do is add another Marantz amplifier, and I would have been in a great position to do quad amping on the stereo channels I want to build.
Such is life
Such is life
With DSP performing driver time alignment, tilted baffles are not necessary... but you still want to select a physical driver alignment with a well controller polar response which mimics a point source launched at the tweeter.
PBN Audio uses Translam construction with the MTM topology. You might find construction ideas on their website.
A TMWW with a 6.5" midrange like the Vapor Derecho seems close to your original translam goals. only 84 slices! You can seal the Derecho and use DSP room equalization for deep bass. (Avalon Beveled cabinets starting to look good?)
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Equalization of room deep bass....Geddes white paper. Tom Welti work at Harmon.
Have you considered maintaining stereo woofers in your room, like a front/back quartal configuration, versus summed mono subwoofers?
1) Stereo bass down to 20Hz has been produced in low distortion, high SPL since 1982 on CDs, DVD-As, SACDs, and 5.1 movies.
2) Most people with normal hearing can identify the difference between stereo vs. mono bass. Stereo bass has phase for location.
3) At frequencies below 80Hz most people with normal hearing cannot isolate the physical location of the woofer.
----Expert listeners can isolate location of woofers down to 60Hz by focusing on impact harmonics, port noise, upper harmonic distortion.
4) Not being able to locate the subwoofer is a good cost simplification, but summing low bass into mono degrades true stereo recordings.
5) With stereo subwoofers, any out-of-phase bass information in a true stereo (acoustic) recording is reproduced properly at full level, adding immensely to the perceived width and depth of the room in which the recording was made.
6) Irregular room shapes and furniture can have a large effect on even subwoofer frequency stereo soundstage.
7) Geddes: “The mains should be designed for the best possible direct field with as flat a power response as possible. Equalization of the mains could only make them worse.”
PBN Audio uses Translam construction with the MTM topology. You might find construction ideas on their website.
A TMWW with a 6.5" midrange like the Vapor Derecho seems close to your original translam goals. only 84 slices! You can seal the Derecho and use DSP room equalization for deep bass. (Avalon Beveled cabinets starting to look good?)
======
Equalization of room deep bass....Geddes white paper. Tom Welti work at Harmon.
Have you considered maintaining stereo woofers in your room, like a front/back quartal configuration, versus summed mono subwoofers?
1) Stereo bass down to 20Hz has been produced in low distortion, high SPL since 1982 on CDs, DVD-As, SACDs, and 5.1 movies.
2) Most people with normal hearing can identify the difference between stereo vs. mono bass. Stereo bass has phase for location.
3) At frequencies below 80Hz most people with normal hearing cannot isolate the physical location of the woofer.
----Expert listeners can isolate location of woofers down to 60Hz by focusing on impact harmonics, port noise, upper harmonic distortion.
4) Not being able to locate the subwoofer is a good cost simplification, but summing low bass into mono degrades true stereo recordings.
5) With stereo subwoofers, any out-of-phase bass information in a true stereo (acoustic) recording is reproduced properly at full level, adding immensely to the perceived width and depth of the room in which the recording was made.
6) Irregular room shapes and furniture can have a large effect on even subwoofer frequency stereo soundstage.
7) Geddes: “The mains should be designed for the best possible direct field with as flat a power response as possible. Equalization of the mains could only make them worse.”
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