Ive read the 30+ page review of the trw17.
I believe in what it says.
does it live up to its hype? If im not mistaken, a poster above is an owner.
I believe in what it says.
does it live up to its hype? If im not mistaken, a poster above is an owner.
These two PD.2450 are located below my living room as seen on pics and Avantgarde Trio are now correctly positioned since Focal Scala speakers were sold. 😎
Thank you for reply;
with "WHERE" I actually meant your homeplace (city, village, town) and not the location in your living room
Lazy Cat, Projet's, living room appears to be located in Ljubljana, Slovenia.
Rotary Subwoofer
The rotary subwoofer is an awesome product that works as intended.
From 25 hz down to below 1 hz with very low distortion and transient
response that is superb! No worries about overdriving or damaging
and just plain realistic.
The rotary subwoofer is an awesome product that works as intended.
From 25 hz down to below 1 hz with very low distortion and transient
response that is superb! No worries about overdriving or damaging
and just plain realistic.
Attachments
Thats a cool build, now all you need is a pair of trw17's to finish off the frequency responce to DC.
Wow, can you provide additional details on the bass horns, such as freq response that the horns are producing in room.
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All I know is rotary array + dubstep = me feeling sick... seriously physically ill.. apparently livestock which was about 1-2 miles away were not very happy and the stage was shut down.
It was outside of Salem, OR. The owner of the system is out of Seattle, I forget his name. The sub-frequency part of the system basically consisted of part servodrive (16 basstech 7's i believe) part rotary. I have no idea where he got the rotary enclosures or if he built them, he was very vague about that part and wanted to talk more about the servodrives. There was incredible pressure in my chest, couldnt hear myself talk, everything felt very strange and seriously messed with my vision. I had to go elsewhere after about 15 minutes. everyone else did too, at that point he turned it down quite a bit, but the land owner asked to have it shut off because the dairy farm nearby (about a mile or two) said their cows were going nuts. I will try to figure out who owned the system and post an update.
The rotaries were in super deep cabinets that kind of looked like some kind of horn... maybe? he wouldn't say. anyways the front looked like this kind of, sorry for the bad drawing. the vertical lines were some sort of baffle type thing i have no clue, the diagonal lines represent depth. the height of each enclosure was aprox hip height. the depth was 6+ ft. Absolutely someone hand built this and was a one off. basically inaudible but you could feel the thing, the pressure was insane, like diving into a 12ft deep pool and swimming to the bottom.
The rotaries were in super deep cabinets that kind of looked like some kind of horn... maybe? he wouldn't say. anyways the front looked like this kind of, sorry for the bad drawing. the vertical lines were some sort of baffle type thing i have no clue, the diagonal lines represent depth. the height of each enclosure was aprox hip height. the depth was 6+ ft. Absolutely someone hand built this and was a one off. basically inaudible but you could feel the thing, the pressure was insane, like diving into a 12ft deep pool and swimming to the bottom.
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Thanks but no thanks, I don't need spike-ing ventilators everywhere near my living room.
Two identical-mirrored under floor sub-bass horns:
- PD.2450 subwoofer driver, 1000 Wrms/4 ohm, 90 dB/1 W/1 m at 20 Hz
- 2,5 m3 closed-sealed chamber behind each sub-driver, acoustically treated
- 0,5 m3 compression chamber in front of each driver, sound pressure linearization to horn mouth
- 9 m long exponential under floor horn, tuned to quarter wavelenght (λ/4) of 9,5 Hz
- frequency response 10-40 Hz, active filter -24 dB/oct
It sounds atmospheric, effortless, re-creates ambient from recordings, focus the sound of the upper bandwidth. Very happy with the results.
... and what kind of "music" do you play on those super systems?
I'm wondering what music or environments could be reproduced/created? Granted it is a grand and worthwhile exercise to create such systems, but what kind of sources are played which give you an enhanced pleasure or at least some sense of more realism, whether "pleasure" is the exactly right word for sounds loud enough to be noxious to cows?
I am not posing these questions in any sarcastic way. Just curious about my own future experiments.
BTW, whatever you think of Danley and tapped-horned (so beloved on this forum), there are very bassy recordings he made of fireworks and trains, etc. floating around the web. Pretty impressive.
Ben
I'm wondering what music or environments could be reproduced/created? Granted it is a grand and worthwhile exercise to create such systems, but what kind of sources are played which give you an enhanced pleasure or at least some sense of more realism, whether "pleasure" is the exactly right word for sounds loud enough to be noxious to cows?
I am not posing these questions in any sarcastic way. Just curious about my own future experiments.
BTW, whatever you think of Danley and tapped-horned (so beloved on this forum), there are very bassy recordings he made of fireworks and trains, etc. floating around the web. Pretty impressive.
Ben
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Four SDL Bass Tech 7 are capable of 133 dB peak at one meter, 25Hz.
16 would be capable of over 145 dB, at 2048 meters (6656 feet, 1.26 miles) would still be around 79 dBSPL.
The BT7 rolls off about 24 dB per octave, the array still could produce in the 121 dB range at 12.5 Hz.
Even without rotary assist below 25 Hz, that level could put the cows off 😉
It was loud, high spl at low frequency is a different experience.. I had read about military experiments and now i know why they were interested, ear plugs might have helped the ears but this resonated my bones, felt like it was trying to use my body as a passive radiator lol!
I see you are using the Avantgarde bass bins as well. Any thoughts on runnng the big bass horns up to 100hz? I am only asking as my 100cm mid bass horn will go from 100hz up and i need to fill from 20 0r 30 hz up to there.
Ya the military was developing weapons based on the resonant frequency of the human body, around 4-7hz iirc.
i think concussion grenades are based on that research.
also the TRW17 are used in hawaii for infrasound research and calibrating mics.
they have a range of over 3km at <10hz, thats some sick low frequency response.
i think concussion grenades are based on that research.
also the TRW17 are used in hawaii for infrasound research and calibrating mics.
they have a range of over 3km at <10hz, thats some sick low frequency response.
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I checked the response without active filter and you can clearly hear the frequencies up to 1 kHz although attenuated. Frequency response is normally decending from its tuned 9,5 Hz slowly to zero if you go up to kHz region. 100 Hz would be the absolute max. for this design and in this case you would need to linearize-equalize its frequency response with adoptable active filter. 😉
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