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Old 28th October 2007, 09:15 AM   #11
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Those drivers sure are cute... i;ve always wanted to play with some of those -- or the little Jordans.

dave
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Old 28th October 2007, 11:35 PM   #12
inrank is offline inrank  United Kingdom
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i was thinking of adding a small woofer say something like the HiVi M5a as it continues the metal driver theme, with around 3dB of BSC be around 84dB, its cheap (25ea), works in a small box with surprising bass (sim'd 6.5L with -3dB @ 60Hz) mabye crossed over at 300Hzish, and a simple 6dB/octave, 30 for the crossover, total project under 100.

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Old 31st October 2007, 01:10 PM   #13
inrank is offline inrank  United Kingdom
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is there any implementation for these other than in a very small closed box?
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Old 31st October 2007, 01:37 PM   #14
Sjef is offline Sjef  Netherlands
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I did build a small transmissionline for them once, just for fun. It worked out pretty well, lows into 55 hz. Didn't go loud though, not at all but it was the most extended range I did ever hear from just one driver. Pretty nice as desktop speakers for low listening levels.
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Old 31st October 2007, 01:59 PM   #15
sreten is offline sreten  United Kingdom
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Hi, possibly a version of the above with those drivers ?, /sreten.
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Old 31st October 2007, 02:44 PM   #16
inrank is offline inrank  United Kingdom
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Quote:
Originally posted by Sjef
I did build a small transmissionline for them once, just for fun. It worked out pretty well, lows into 55 hz. Didn't go loud though, not at all but it was the most extended range I did ever hear from just one driver. Pretty nice as desktop speakers for low listening levels.
that sounds interesting, do you have any other info, plan/size, photo etc?

or even possibly a BiB?



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Old 1st November 2007, 12:56 AM   #17
Sjef is offline Sjef  Netherlands
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I don't have them anymore and have no plans or pictures. It was just a standard one time folded textbook TL design with a starting area of roughly 1.4 sd and an end of 0.8 sd total lenght of 1.4m and filled with wool. This was not a perfect transmissionline, far from it but still it was really fun to hear how low the little Bandor can go. it wasn't a serious project just something to try for fun. The little Bandor runs very quickly out of steam in such an enclosure but what else did you expect.
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Old 6th February 2008, 06:53 PM   #18
inrank is offline inrank  United Kingdom
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sorry to dig this up,

but do you think a small TL for the Bandor, sort of like this-

http://www.lautsprechershop.de/hifi/.../tml_w3alu.htm

would work?

done a calculation using - http://www.mhsoft.nl/spk_calc.asp#transmissionline and came up with the following folded design attached

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Old 6th February 2008, 10:30 PM   #19
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I doubt it -that calculator isn't exactl sophisticated & it's apparantly using a couple of assumptions which are incorrect. Try reading Martin King's site & using his alignment tables.
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Old 7th February 2008, 10:15 AM   #20
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Hi inrank.

Did you ever give any consideration to, or try, moving the 'egg' further away from the room centre so that more of the HF is directed into the listening area and less into directions where it can be reflected by objects and walls ?

Cheers ............. Graham.
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