Rex Baldock's Paraline Speakers - diyAudio
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Old 14th October 2012, 01:22 PM   #1
atnaat is offline atnaat  Wales
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Default Rex Baldock's Paraline Speakers

Does anybody have the plans Rex Baldock's Paraline speakers? All I can find in google is a miniscule thumbnail of a cutaway. All I know is that they were published in an issue of Hi Fi News in the 60's. Anyone?
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Old 14th October 2012, 01:36 PM   #2
bappe is offline bappe  Sweden
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I do, but only a hardcopy at home and im on a trip at the moment. I will check this thread when I get home on the 22nd and if you are still looking for i can scan and post it for you.

BR,
Anders
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Old 14th October 2012, 01:47 PM   #3
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Best I could find, but not enough to make it:

Click the image to open in full size.

It's interesting that the front panel is angled. Otherwise it looks fairly standard.

I don't use Martin King's calculation sheets myself, does anyone know if they can handle an angled front panel? Would be interesting to see the effect.
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Old 14th October 2012, 03:09 PM   #4
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It was done that way because most of the contemporary units -Lowthers, Wharfedales etc - needed to be listened to off-axis. The original Lowther-Voigt corner-horn is another example where you have indirect radiation to take the massive midrange peak inherent to the drivers down somewhat. Granted, you lost the top end too (>12KHz), but since most broadcasts & many recordings from the generation these drivers were designed in didn't have any in the first place, this wasn't much of an issue.
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Old 14th October 2012, 04:00 PM   #5
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That's reminiscent of the Kef coffin sub.

Bob
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Old 14th October 2012, 04:18 PM   #6
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I imagine there was some inspiration in there somewhere, direct or otherwise.
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Old 14th October 2012, 06:59 PM   #7
GM is offline GM  United States
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Nice BIB adaptation!

GM
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Old 14th October 2012, 07:16 PM   #8
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Guess you weren't the only one building big tapered pipes back in the day then Greg.
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Old 14th October 2012, 07:39 PM   #9
GM is offline GM  United States
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Hardly! I got my first 'taste' cloning Jensen's awesome 1952 TL 'sub' [tapped, though didn't understand the concept at the time] that led me to finding Voigt's patent among others, so it seems reasonable that it and Voigt's designs stoked many folk's imagination also:

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Old 14th October 2012, 08:41 PM   #10
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I am building up a pdf of scans from a welsh/portuguese member that includes this design.

dave
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