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Found this on YouTube, this was at the FLAX show. I posted this here because the woofer they were demoing, was being used with .7s. This is way above my pay grade, so Davey, Josh or smarter people than me will have to chime in on the tech.I see lots of positive remarks in the comments section of the video. Ironically they are using a test track I often use Dire Straights, Fade To Black.
I'll skip the marketing spiel and go straight to technology section.
The World's First Acoustically Amplified Subwoofers
While others in the audio industry abandoned the enclosure geometry in pursuit of driver perfection, LCH made the enclosure geometric design a central focus. A single concealed 10"woofer deep in the cabinet fires into an acoustic compression chamber and is folded towards the listener through a pair of vertical cork horns, amplifying the sound and reducing power requirements. Our patented Dual Horn Compression Chamber (DHCC™) enclosure uses a plurality of complex nested waveforms inside the box to condition the output acoustically creating more dB per cc than any other design...with astounding efficiency and linear response. This is the first design of its kind, with technology scalable to applications across different industries.
Pairing with any loudspeakers is seamless. Where most subwoofers require a crossover set well into the bass operating range to remove the anomalies which contaminate the upper frequencies, the LCH creates such a linear response well into the midrange, a traditional crossover is unnecesssary. A single induction coil rolls off the frequency at 6db per octave at 250Hz. After two octaves, the response is flat out to 2000hz. The result is an uncanny ability to not only improve bass fidelity but also improve midrange coherance even with the best full range speakers. Hard to believe? Just listen.
Edits: 02/27/23Follow Ups:
nt
With that type of music you probably don't need a sub.
Yeah, this was mentioned off-handedly in a thread down below.
I don't see anything innovative there at all. Just another compound enclosure setup with some crazy looking "flair"ed ports. :)
The setup would have an inherent bandpass characteristic. So this is why they don't have a need for a significant electrical low-pass filter.
Dave.
.... snort
....
Thank you for posting about the music being played on the video. I have quite a few albums by Dire Straits, but not "On Every Street" where "Fade to Black" is recorded...-.
I ordered the CD this morning...-.
"The World's First Acoustically Amplified Subwoofers"
I guess their marketing department never heard of horn subs before.
A 6 dB/octave low pass at 250 Hz for the passive version seems like an awkward way to link to a main speaker that probably goes down to 60 Hz or even lower.
Plus I'd like more info in how the box design amplifies(?) the bass passively. It could be a more efficient bass loading but that's not really amplification. Meantime I'm keeping my mind open til more info arrives.
Yeah, more playing with acoustical impedance and an acoustical transformer i.e., a horn. (I haven't had time to look at the video, just going by the description here -- their implementation sounds interesting, have to check it out.)
https://www.youtube.com/watch?v=GiUfNnftDPs
Opps, I was trying something different and it didn't post right
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