Finished my second BIB. This time Lowther DX3 - diyAudio
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Old 6th April 2008, 02:55 AM   #1
gnugear is offline gnugear  United States
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Default Finished my second BIB. This time Lowther DX3

Wow, all I can say is that the Lowther Drivers are worth every penny. They only have an hour of play time on them and they're clearly better than the Fostex 168 sigmas that I built a few weeks ago. The presentation is more full, clear, crisp, and lifelike. Sounds like a curtain was in front of the Fostex drivers.

Here are a few pics. Excuse my mess but I'm revamping my entire system and need to get rid of stuff. As it is I'm doubled up on amps and speakers. Now that I've got the SET/horn bug, the traditional stuff will have to go. Thanks again to Zilla for his BIB site and Scottmoose for the dimensions. Up next is the Sachiko. I can't wait to hear what the Lowthers will be like in that enclosure.
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Old 6th April 2008, 02:57 AM   #2
gnugear is offline gnugear  United States
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Right speaker with Mississippi John Hurt in the background.
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Old 6th April 2008, 02:59 AM   #3
gnugear is offline gnugear  United States
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Fostex and Lowther BIBs next to each other. They're the same height but the Lowther is much deeper.
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Old 6th April 2008, 03:05 AM   #4
gnugear is offline gnugear  United States
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one more with both speakers.
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Old 6th April 2008, 01:49 PM   #5
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Nice work and thanks for the comparison between the two drivers. Looking forward to your comparison to a horn.
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Old 6th April 2008, 03:41 PM   #6
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The BIB is a horn.
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Old 6th April 2008, 04:39 PM   #7
MJK is offline MJK  United States
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Quote:
Originally posted by Scottmoose
The BIB is a horn.

Depends on how you define a horn.
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Old 6th April 2008, 05:11 PM   #8
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True, but then, what else could you call it from a technical POV Martin? Not trying to be pedantic, just curious. The BIB is a closed cone, or approximates one anyway, as it expands toward the mouth (unlike a TQWT, which is reverse tapered), and in practice is a 1/2 wave resonator with a 1/4 wave fundamental. That's pretty much the definition of a horn TTBOMK.
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Old 6th April 2008, 05:28 PM   #9
MJK is offline MJK  United States
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My definition of a horn includes the size of the mouth, in my way of thinking a horn's mouth completely damps the potential standing waves. For bass this means the effective mouth needs to be very big. My definition of a horn does not include resonances as an action that produces sound. A BIB relies on resonances to reinforce the bass, so to me it is a varient of a TL.
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Old 6th April 2008, 05:30 PM   #10
MJK is offline MJK  United States
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Quote:
Originally posted by Scottmoose
and in practice is a 1/2 wave resonator with a 1/4 wave fundamental.
If one end is open and the other end closed, I think you can only have quarter wave resonances. I am not sure how a half wave resonance shape can be supported by this geometry.
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