listening spot measurements right and left
My room bullies nmb´s so bad they cry. it´s all compromise, on this setup i miss my old genelecs which were awesome on lower midrange, damn PHL
just damn
Why do you damn PHL? I must have missed something. Are you using a PHL driver now?
those genelecs had PHL audio, thats why i i wanted this to be PHL in first place.
i think their motor isn´t silent for OB though.
but easy swap to phl 5010 if wanted
I see. You were thinking PHL for the woofers. I am considering PHL midrange vs FST, that's why the comment got my interest.
Manninen you have done lots to the freq response, it looks very flat now. Do you know what causes the symmetrical suck-out 100-200Hz in both channels?
Good luch with the 1st and 2nd order filters! I like to use them usually, or even pure acoustical xo . You have good drivers for shallow filters, they are all well behaved.
Try this for sh*ts and giggles (might sound like shite )
18N862: (no highpass), lowpass 100Hz/1st order
18sound 15": (no highpass), lowpass 300-400Hz/1st order
B&W: highpass 400Hz 2nd order, lowpass 3-4khz/1st order
Beyma: highpass 4kHz/2nd order
Good luch with the 1st and 2nd order filters! I like to use them usually, or even pure acoustical xo . You have good drivers for shallow filters, they are all well behaved.
Try this for sh*ts and giggles (might sound like shite )
18N862: (no highpass), lowpass 100Hz/1st order
18sound 15": (no highpass), lowpass 300-400Hz/1st order
B&W: highpass 400Hz 2nd order, lowpass 3-4khz/1st order
Beyma: highpass 4kHz/2nd order
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18N862: (24hz 24oct), lowpass 93Hz/2nd LR
18sound 15": 93 1st bessel, lowpass 450/1st bessel
B&W: highpass 450Hz 1st bessel, lowpass 2,5khz/1st bessel
Beyma: highpass 2,5kHz/2nd LR
for the reference linear phase.
new is left and linear phase is right. now have to listen few hours
suck out is from side wall and from floor. i eq´d nmb, fst and tpl. nmb and fst are tuned to sound good with out xo, some equing out of xo
https://dl.dropboxusercontent.com/u/33080121/hifi/steelisreal/jakarit.mdat
theres the file, interested to hear some thoughts
linear phase has some room eq´ing
18sound 15": 93 1st bessel, lowpass 450/1st bessel
B&W: highpass 450Hz 1st bessel, lowpass 2,5khz/1st bessel
Beyma: highpass 2,5kHz/2nd LR
An externally hosted image should be here but it was not working when we last tested it.
for the reference linear phase.
An externally hosted image should be here but it was not working when we last tested it.
new is left and linear phase is right. now have to listen few hours
suck out is from side wall and from floor. i eq´d nmb, fst and tpl. nmb and fst are tuned to sound good with out xo, some equing out of xo
https://dl.dropboxusercontent.com/u/33080121/hifi/steelisreal/jakarit.mdat
theres the file, interested to hear some thoughts
linear phase has some room eq´ing
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i dont care about 100-200hz for now. speaker placement aint final, but suction came when i lift the nmb 50cm and sideways 20cm.
i could get few db if crossing bms to 120hz. im not gonna do it. but if hitting nmb to 24hz 70-100 gets too much, i have to take few db´s away from bms anyway
i could get few db if crossing bms to 120hz. im not gonna do it. but if hitting nmb to 24hz 70-100 gets too much, i have to take few db´s away from bms anyway
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new b&w midrange
damn!
An externally hosted image should be here but it was not working when we last tested it.
changed little bit when i turn highpass off from bms.
there is few too many equin cause nmb and fst needs little bit different setup versus linear phase. writed bessel but butterworth are 1st xo´s, fst cannot handle 1st so i have 18volt limiter to bms, i hit 18volts really easy
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third XO.
Tried to find specs for LX521 which xo it uses, im quessing
bass 2nd
mid 2nd, 1st
upper mid 1st, 2nd
tweeter 2nd.
New predators aint so good as first, toeing speakers i´ve noticed lobing
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looks like this now. Bass isn´t so dark sounding located on top and it´s safe from refugee cat´s whos inda house.
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Changes to future:
15" it´s problematic, if not selling them and changing them i have to take dustcaps off,
motor is way too noisy for ob.
15" has plenty of power, single 18" can´t keep up, there´s room downstairs to another one. but i´m looking twin 21" allready, can´t say it´s gonna be killer anything but looks
This project really opened the gates of hell to speaker building, new project allready on my mind.
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took 6ms window 0-90deg speaker middle of the room, mic on place just turning the speaker.
its 3way now, selling the NMB, trying to find something in stead.
500hz xo to 18" bms someone might even listen system like this
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0018 10NMBA520 - LF Transducers - Neodymium 10NMBA520 : Eighteen Sound - professional loudspeakers
im interested at this, but i dont know what happens to distortion @90hz and i think 15" has more grunt to lower mid.
but now i understand more lx521 that 4" and 8" are good size in the middle of 4way dipole
yellow line is 90deg, isnt 290hz 18" dipole peak and 1500hz for 6" fst?
im interested at this, but i dont know what happens to distortion @90hz and i think 15" has more grunt to lower mid.
but now i understand more lx521 that 4" and 8" are good size in the middle of 4way dipole
yellow line is 90deg, isnt 290hz 18" dipole peak and 1500hz for 6" fst?
Manninen, is your TPL200 still without or with the wavequide in that polar measurement? 2-9Khz region is quite wide radiating, this can alter the tonal balance if the system is listened from further away and the room is participating. In near field listening it does not matter as much, if at all. If you feel there's too much energy in the upper mids/lower treble it can be compensated somewhat by decreasing the level in that region in front response with a wide PEQ, something like -2dB/0,1-0,3 Q centered at 5khz.
edit. I think a naked 18" woofer has it's dipole peak higher than 290Hz, somewhere at 400-600hz perhaps. Maybe it's the ~510Hz peak in the measurement. The 1500hz dipole peak sounds about right for a 6,5" inch naked midrange.
edit. I think a naked 18" woofer has it's dipole peak higher than 290Hz, somewhere at 400-600hz perhaps. Maybe it's the ~510Hz peak in the measurement. The 1500hz dipole peak sounds about right for a 6,5" inch naked midrange.
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That BMS has some impedance peak going on at 400Hz, I wonder what it is. There is no distortion peak at 400Hz although at 300Hz there is. Also there are much more "low order low pass" -compatible midranges out there, the upper end response looks quite ragged and it would not propably like to be xo'ed with 1st order filter.
Hmmm, double eights. Maybe. Hah, four eights per channel as a matrix around the B&W mid and TPL200 .
How does the 18" sound at 200-500hz?
Hmmm, double eights. Maybe. Hah, four eights per channel as a matrix around the B&W mid and TPL200 .
How does the 18" sound at 200-500hz?
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System is breakin up like Dire Straits.
Steel is still real, im searching more zen and looking for silent motor speakers for next mordor tower.
For the note i got much better decay from boxed upper mid than 6" naked. i allways felt i had to do something for the 1500hz, i´d say it´s just dipole peak what comes from non acoustic room.
Same too for running 15" to near 500hz, that 10" feels better too, that peaks 1k and now runs to 400hz
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Second order cardioid. Two dipoles back to back and the front one electronically delayed by the amount of their distance.
.
An externally hosted image should be here but it was not working when we last tested it.
like this? interesting
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