well, thats some interesting looking traps
i bet the wife loves it !
maybe im seeing not clearly, but the ceiling bass traps looks about 8" thick. your corner traps are also not thick enough.
I feel real bass traps need at least a good 15 inch thickness min to begin really helping down to about 50hz.
and you need to cover as many corners as you can, not just the corners floor to ceiling, but also the ceiling to ceiling corners, and floor to floor corners
I bought around 10 bags of rockwool batts. The ceiling absorbers were out 24" - 34" from the edge, depending on the angle of the mode. But this isn't the point.
I'm not disagreeing with you that with enough of them, you can make the walls disappear. I'm thinking I'd have needed to double them and double them again, to begin to achieve what I know is possible.
I think todays question is whether there is a problem with multi-subs. It does take some time to learn to get results from them.. and the upshot is I no longer use absorption specifically for basstrapping.
I'm not disagreeing with you that with enough of them, you can make the walls disappear. I'm thinking I'd have needed to double them and double them again, to begin to achieve what I know is possible.
I think todays question is whether there is a problem with multi-subs. It does take some time to learn to get results from them.. and the upshot is I no longer use absorption specifically for basstrapping.
Lets compare real measurements.
Left is bassreflex speaker measured from 10 cm fom middle point between speaker and tube opening, box is tuned to 55 Hz.
Right is in room measurements, speaker is multi bass (2 pc.) OB, DSP corrected, room is not acoustically treated, mic is 2.7 m from speakers.
Absolute SPL levels are not same but decay time can be compared.
I not see magnitude less stored energy in bass reflex.
I attended an audio show last Sunday and once again the mantra "go big or go home" was confirmed (for me at least).
The first room I entered had the Blumenhofer Gran Gioia 2×16 Turbo playing. Everything I heard after that sounded like a toy. Bass was amazing. Tight, clear, clean, unstrained, whatever you want to call it.
Big doesn't automatically mean good though. I also heard the Focal Grande Utopia EM EVO, and that sounded like a giant booooom box
The first room I entered had the Blumenhofer Gran Gioia 2×16 Turbo playing. Everything I heard after that sounded like a toy. Bass was amazing. Tight, clear, clean, unstrained, whatever you want to call it.
Big doesn't automatically mean good though. I also heard the Focal Grande Utopia EM EVO, and that sounded like a giant booooom box
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Focal grande, innefficient joke.
BIG 2 way with horns. probably 100db efficient. sign me up!
Lovely, wonderful.....but I can imagine the cost... Let's make a group purchase and listen them a month each!
The best bass ever from a factory made speaker, my choise will be the Revel Salons 1 nr 2 was Infinity IRS Sigmas.
The best bass ever listening to, come from my own diy 6 X 12 inch Peerlees 830847 tuned to 22 hz in ported netto 102 liters working up to 340 hz active filter.
My room is 5 x 10 meters but fills every inch of it, and also plays 120 db 20 hz with headroom.
The best bass ever listening to, come from my own diy 6 X 12 inch Peerlees 830847 tuned to 22 hz in ported netto 102 liters working up to 340 hz active filter.
My room is 5 x 10 meters but fills every inch of it, and also plays 120 db 20 hz with headroom.
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I ran eight of those xxls drivers, sealed, and I'd have to say it's the best bass I've ever experienced in a domestic environment.
Best bass ever heard. This active crossover system with 2x JBL 18" and 2x JBL 15", on each side. so total 4x 18, 4x 15, in a ~ 20x40 room. Driven by crown amps. The bass was fast and effortless. I couldn't tell if it was uniform though.
The most uniform bass is 2x 12" + 2x 15" total in a multi-sub room.
I think the pattern from this thread is. either 1) lots of Sd/Vd. 2) multi-sub. Or both?
The most uniform bass is 2x 12" + 2x 15" total in a multi-sub room.
I think the pattern from this thread is. either 1) lots of Sd/Vd. 2) multi-sub. Or both?
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Yes with xmax at 12,5 mm+-, 350 watt/92 dB and 2 x 8 Ohm´s coil you can connect 3 per side still with 5,66 Ohm in total and just let the 900 watt Krell amp work them out.
Non 12 inch driver come close today and its a pitty Peerlees stop manufactured them XXLS 830847 late 2007.
Mine was wating new in boxes from 2005 until 2020
Which model of the Peerlees xxls driver did you use cowanaudio?
jmpsmash, sounds close to what I had.
4 x 18's ppsl 27hz 6th order subs, 4.3mm xmax eminence closeout 18's.
4 x 15's (1 used as baffle step per side)
2' wide horn mids
1038a piezo
actively crossed at 80hz, 750hz, and 5khz.
All in a raised ranch basement concrete room 14' x 26' deep.
I did hear more bass but the room was a dance hall and 100' away.
https://www.dancemorballroom.com/
8 boxes of push pull slot loaded 15's
https://www.audioasylum.com/cgi/vt.mpl?f=hug&m=161240
35hz tuned 15" PPSL, 6th order (not band pass) eq (+6db boost at tuning, without it is -9db down at 35hz otherwise), and boost works as subsonic protection.
Each box was 102db 4ohm load otherwise. I assume 200 watts per box (+23db). I don't plan on more due to voice coil losses past 100w per driver.
Then all 8 boxes each have their own amplifier channel, so 102db + 23db (200w) = 125db 1 box, 131db 2 boxes, 136db 4 boxes, and we come to 142db from 50hz up, 139db @ 35hz. Each amp needs over 800 watts rms per channel to deal with the +6db of boost at tuning.
https://cdn.shopify.com/s/files/1/0270/8665/1462/files/Kappa_Pro_15LF2.pdf
near $200 each
That makes a lot of noise for $3,200 total not including amplifiers.
You get high sensitivity with woofers qts .3 and 35hz FS, and somewhat smallish 6.7mm xmax if used as a subwoofer.
But you get high sensitivity at 2.83v
And a smallish box, but.................
You need +6db of power to add for boos at tuning.
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Okey cool
, did you connect the 2 x 8 ohm coils in serie to 16 ohm and paralell connect them at speaker connection?How many liter each sealed?.....Working frequency?.....any eq?... passive or active?
The OLX3602 seems strong!
My room is in the basement is concrete floor/roof with thick stonewalls and acoustically regulated, and if i close my door the room is also airtight.
And always hard to tell about how something sounds, but i never heard a more correct dry brutal bass (noting exept the cones move in the room)
And its almost "invisseble" on many recordings, but hit you with great dynamics when it supouse to and all is feeling "so alive".
Was many hours work until my final result, and its hard to get 20 hz and also high SPL (120dB+)
When you don't want too big boxes and at the same time want a very musical integrated bass.
My belive with my good integrated bass in my system is that i use it up to 340 hz, and i think its much harder to integrate a "normal" 60/80/100 hz sub
Your measurement makes my point. Change the level scale to linear if you don’t believe me.
Have any of y'all actually experienced a Double Bass Array? It sounds like a neat idea, but potentially stringent requirements making it difficult to set up in a domestic situation. If you did it (or tried) I'd like to hear about your experience. Or if you know of a good write up of actual implementation, not just someone saying it should be good or the theory of how it works...