Back in 1982, when Public Enemy started to become popular, 200 Hz was a common crossover point between lower and upper drivers in professional high-output live sound use, before the term "subwoofer" became popular in consumer products.And I see where he got that range from.
https://en.wikipedia.org/wiki/Subwoofer
"The typical frequency range that is covered by a subwoofer is about 20–200 Hz for consumer products,[1] below 100 Hz for professional live sound,[2] and below 80 Hz in THX-certified systems."
He came to a DIY site for a CONSUMER PRODUCT frequency response.
Back in 1982, when Public Enemy started to become popular, 200 Hz was a common crossover point between lower and upper drivers in professional high-output live sound use, before the term "subwoofer" became popular in consumer products.
The term "subwoofer" is derived from the prefix "sub" meaning “underneath or lower”, and has been used in that context since the 1970s, long before wiki existed.
That said, Camplo's use of a high frequency compression driver for frequencies down to ~200Hz does not fit any typical product range..
Exactly, NOT 20hz SUBwoofers playing to 200hz.So naturally the bass bins would be expected to go up high enough. They weren’t expected to go below 40 (or even 50 to 60) either.
Those were reflex boxes, not horns, right? A lot easier to get a clean 30-200 Hz. And they wanted power handling out of the 10’s - and I’m guessing they were high efficiency in the high 90’s to low 100’s with 3 mm of x-max to keep up with the 18’s, not just over 90 dB/W with 10+ mm.Clair Brothers JBL front loaded four-way S4 cabinets used 2x18" into 4x10", crossed at 200Hz.
Hell, all these miniature 15” tapped horn designs floating around here won’t even get you those two octaves.2 octaves are the norm.
20-80hz SUBwoofer.
50-200hz Bass Bin.
It all sh!ts the bed after 3x the 1/4 wavelength Unless you move the driver down 1/3 closer or extend the resonator length on the opposite side by 1/3(bose wave cannon/paraflex)?That's because they are designed for pro audio and not home theater.
And by eliminating the crossover, either the high output low frequency or bass in the ~100-200Hz range is generally compromised.But yeah, its a unique design ask to completely reach 20hz while crossing high but when it works, you eliminate a crossover
I know this is a completely different approach/ philosophy, but why not do a 2 in 1 subwoofer? Make something like Genelec does with the W371A or 8381A? I think this will give the range you want, in a smaller package, and optimize detail and clarityHi yall, I'm hoping to create a space to talk about subwoofers that reach higher than typically expected, all the while covering down 20hz/30hz without sacrificing the accuracy of its upper passband. Sealed enclosures with multiple large woofers, and high xmax are a good choice. Having pairs of these types of subs only makes things better and being that we are traveling into the realm of localization by playing so high, these types of subs are to be apart of the mains, either by proximity or appendage.
Sealed enclosures as described above make short work of the task... I'd consider something like a large sealed cab, dual 18" with >14mm xmax the status quo. Where it gets interesting is transmission line and bass reflex. Vented Designs need to be a lot more particular. Damping is needed but maybe not in every design. A front loaded horn like the known HT tuba which is an bandpass design where the front horn is entered in offset, may do well thanks to the near 0 CSA at the beginning of the line. Of course it comes with its own sets of pros and cons, the line length creates delay, for example.
I will post some designs that fit the category, and I hope that you guys have some designs that you like as well. There are details that help optimize these types of subs, lets chop it up at our leisure
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