Some humorous in-room polars, just three strokes and im out, 0 90 and 180. 15ms window
naked 15"
blanked folded on top and sides, rear is open
blanked folded on top and sides and big pillow on rear
blanked folded on rear with with big pillow, sides are open
blanked double folded on rear, sides are open as pictured
two last sounded best to my ear, damping sides it start to sound bit box speaker like. Theres mordor on the back, naula the cat is sleeping on her pouch, she cant tip that cat tree
http://www.diyaudio.com/forums/subwoofers/47431-damping-rear-wave-dipole-woofer.html
oh there is thread for this one too
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naked 15"
An externally hosted image should be here but it was not working when we last tested it.
blanked folded on top and sides, rear is open
An externally hosted image should be here but it was not working when we last tested it.
blanked folded on top and sides and big pillow on rear
An externally hosted image should be here but it was not working when we last tested it.
blanked folded on rear with with big pillow, sides are open
An externally hosted image should be here but it was not working when we last tested it.
blanked double folded on rear, sides are open as pictured
An externally hosted image should be here but it was not working when we last tested it.
two last sounded best to my ear, damping sides it start to sound bit box speaker like. Theres mordor on the back, naula the cat is sleeping on her pouch, she cant tip that cat tree
http://www.diyaudio.com/forums/subwoofers/47431-damping-rear-wave-dipole-woofer.html
oh there is thread for this one too
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An externally hosted image should be here but it was not working when we last tested it.
yes its cardboard. yes its random. yes its ob.
i dont know, wavequide made of steel? at least its more familiar me to work with than wood.
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15" deltalite and tpl200h crossed 2000hz brickwall, no delay needed and does not sound bad at all. deltalite start to beam after 1k, could measure better if deltalite were mounted lower.
Did other cardboard guido too, 4cm deep and just about 4db less boost than this first.
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if kind of being here for a while, OB died when i listened side by side my corner sealeds versus mordor ob, and there is Her Acceptance Factor and My own Acceptance Factor, we just dont like speakers middle of room.
So im evolving these corner speakers.
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on top beyma tpl200h
upper mid b&w fst on jbl cinema horn
low mid bms 12n820
and on low end bms 18n862
xo points 80, 400 and 2000hz
and what im working with now is tryind to make better fst to jbl horn
now im going really dark so watch out
https://www.youtube.com/watch?v=nMqxNPsfN50
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Fst has M6 threads front and back, really easy to test different phaseplugs, now testing type 2 diabetes type plugs
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round can, few naulakissas skid marks inside horn, music interests her
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funktion one type wedge plug
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Green: fst without phase plug
Yellow: fst with stock phase plug
Blue: round can plug
Purple: funktion one style wedge plug, wool sock damped
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just those yellow and purple, +3db over 1k and flatter on bottom.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
I got the idea when looking martin audio data, i kind of found source for martin audio donut style phase plug, looking forward to get some own measurements with that.
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Just got them!!
tomorrow some measurements, expectations are very high cause of DHL these got very high custom taxes!!
I believe in corner horns! FST-horn definitely needs the plug. By the way I don't understand why it is called "phase plug". It prevents high F soundwaves crisscrossing the cone walls near the throat. What woud be a better name...
D2 Dual Diaphragm Dual Voice Coil Compression Driver
D2 Dual Diaphragm Dual Voice Coil Compression Driver
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Since "high F soundwaves crisscrossing the cone walls near the throat." can cause phase issues my suggestion is "Phase plug", the sales pitch would be "Phase plug! New and improved, puts a plug on those phase issues!".
Not sure if that will work for you though, we can always just make a new acronym, like SX-Adaptor as in soundcrossing adaptor, but if you just say SX Adaptor it sounds like something else...
Not sure if that will work for you though, we can always just make a new acronym, like SX-Adaptor as in soundcrossing adaptor, but if you just say SX Adaptor it sounds like something else...
^Well, have you ever seen a phase angle graphic presentation of a horn? We see spl response graphs everywhre, and we notice how spl goes up and down because of these crisscrossing soundwaves that are in different phase and collide which causes spl to attenuate or grow.
"Short wavelength interference attenuator" SWIA
"Short wavelength interference attenuator" SWIA
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eq is now off from fst
420-2200hz xo, fst seems to be most efficient module on this system it has lowest amp gain and still had to run -3db!!
it does sound better now
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inroom 0-90deg 5ms
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inroom 0-90deg 300ms
humorous, 90deg had to measure mic against the wall
now i have four xo´s
1st bessel
2nd bessel
harsch
and linear phase brick wall
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Been connected to steel bikes again, now waiting some parts to frame jig so time to mess with hifi again.
some simulations with rew:
NOW:
bass 80hz lowpass
low mid 80-400hz
and these are tomorrows simulations
FUTURE:
bass 80hz lowpass
low mid 80-400hz.
Simulations for lowmid looks really bad, but now i have kind of phasey bass section and i dont like it.
i have to try this thing, it looks similar to whats simulation says on bass.
i hope i can call the phasey away tomorrow
some simulations with rew:
NOW:
An externally hosted image should be here but it was not working when we last tested it.
bass 80hz lowpass
An externally hosted image should be here but it was not working when we last tested it.
low mid 80-400hz
and these are tomorrows simulations
FUTURE:
An externally hosted image should be here but it was not working when we last tested it.
bass 80hz lowpass
An externally hosted image should be here but it was not working when we last tested it.
low mid 80-400hz.
Simulations for lowmid looks really bad, but now i have kind of phasey bass section and i dont like it.
i have to try this thing, it looks similar to whats simulation says on bass.
i hope i can call the phasey away tomorrow
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NOW:
FUTURE:
I think im not gonna build new corner boxes.
Story goes on...
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An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
FUTURE:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
I think im not gonna build new corner boxes.
Story goes on...
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Nothing special going on here, just changed shelf filtering to PEQ and phase curve got little bit better, upper graph is steep linear phase and lower is 1st bessel, window is 2ms. measured over listening spot couch.
wavequidos seems to bend phase a little bit.
These two are best xo´s i have worst is LR2, LR4 ain´t to bad either.
I had forgotten how your setup had evolved. It's looking very similar to what I'm thinking: TPL-150H above 2kHz, a cone-driven horn from somewhere in 400 to 600Hz in a wide horn, dual 10" midbasses side by side below the horn, and separate subs.
Which JBL Cinema horn are you using? Is it 6.5" or did you adapt it to the FST? BTW, I have FSTs in my B&W speakers and like them very much. And I might need to venture into phase plugs to extend my 5" Faital midranges a bit.
Lots of similarities between the projects!
Which JBL Cinema horn are you using? Is it 6.5" or did you adapt it to the FST? BTW, I have FSTs in my B&W speakers and like them very much. And I might need to venture into phase plugs to extend my 5" Faital midranges a bit.
Lots of similarities between the projects!
quido is from 3730. i have plans to evolve that wedge style phaseplugs, easy to fit with fst.
upper graph is steep 90-150db/oct 420-2200hz, that round phase plug helps that 2k area, tpl crossed @2k phase rises little bit more.
Haut-parleur PHL Audio 1500Nd-SQ, 8 ohm, M17Nd, charge arrière close
this has been on my mind too, but i dont need any more db to midrange. fst runs now -6db below others!!!
upper graph is steep 90-150db/oct 420-2200hz, that round phase plug helps that 2k area, tpl crossed @2k phase rises little bit more.
Haut-parleur PHL Audio 1500Nd-SQ, 8 ohm, M17Nd, charge arrière close
this has been on my mind too, but i dont need any more db to midrange. fst runs now -6db below others!!!
amp gains revisited
old: low lowmid mid high
29 26 22 22
pre 0 0 -5db 0
new: 25 22 22 22
pre 0 0 0 0
tpl´s got 3,3ohm serial resistors and fst´s 7,5ohm, thats -4db to tpl and -9db to fst.
-4db overall to dsp noisefloor, hiss from dsp is now much better.
i now have funktion one r2sh´s on the way, maybe some mordor tower OB <250hz 2x15" or double 18" incoming, Legis of course said HORN but you know him, eh
old: low lowmid mid high
29 26 22 22
pre 0 0 -5db 0
new: 25 22 22 22
pre 0 0 0 0
tpl´s got 3,3ohm serial resistors and fst´s 7,5ohm, thats -4db to tpl and -9db to fst.
-4db overall to dsp noisefloor, hiss from dsp is now much better.
An externally hosted image should be here but it was not working when we last tested it.
i now have funktion one r2sh´s on the way, maybe some mordor tower OB <250hz 2x15" or double 18" incoming, Legis of course said HORN but you know him, eh
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