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Old 11th December 2012, 04:13 AM   #21
xrk971 is offline xrk971  United States
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Ok, so I am looking for an 8 incher with low Qts. What happens if I have a higher Qts driver? I know a dual paper cone 8 inch that is budget priced but has Qts of 0.40. Is that low enough? I was thinking of the replica "Pioneer Bofu" GRS 8FR-8 Full-Range 8" Speaker Pioneer Type B20FU20-51FW 292-430
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Old 11th December 2012, 05:09 AM   #22
KoHo is offline KoHo  United States
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Quote:
Originally Posted by xrk971 View Post
Ok, so I am looking for an 8 incher with low Qts. What happens if I have a higher Qts driver? I know a dual paper cone 8 inch that is budget priced but has Qts of 0.40. Is that low enough? I was thinking of the replica "Pioneer Bofu" GRS 8FR-8 Full-Range 8" Speaker Pioneer Type B20FU20-51FW 292-430

My Lowther Qts only 0.2~ it's better Hi frequency and detail for listen classic music, Qts 0.4 may well balance and better for jazz or vocal, just try and let me know.

Last edited by KoHo; 11th December 2012 at 05:22 AM.
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Old 11th December 2012, 12:13 PM   #23
xrk971 is offline xrk971  United States
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I actually would use it mostly for vocals and jazz so maybe will work fine. There is also a similar driver from Visaton w even higher efficiency called the bg20. Visaton 3020 BG20 8" Full-Range Speaker with Whizzer Cone 8 292-548
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Old 11th December 2012, 03:03 PM   #24
KoHo is offline KoHo  United States
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what I saw the different form your choice of drivers are 'the surround', GRS is Foam surround mean deeper mid-low ,sound tone will be soft and warm, Vistaon is pleat surround like vintage JBL have tight and fast mid-low.
For me, I using tube amp, stick with higher efficiency driver.
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Old 12th December 2012, 04:26 PM   #25
ra7 is offline ra7  United States
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Audio Nirvanas are a good substitute for Lowthers.
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Old 12th December 2012, 06:16 PM   #26
KoHo is offline KoHo  United States
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Originally Posted by ra7 View Post
Audio Nirvanas are a good substitute for Lowthers.
Hi ra7
Would like to know the sound characteristic of Audio Nirvanas.
Anyone can share?
Thank

Last edited by KoHo; 12th December 2012 at 06:20 PM.
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Old 17th December 2012, 08:28 PM   #27
wbuggr is offline wbuggr  United States
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Greetings KoHo, The zen acousta is beautiful and intriguing.... I keep coming back to these posts. Can you tell me a bit more on how you calculated the, or lack thereof, compression chamber? I can't seem to satisfactorily back-calculate the posted horn dimensions to match your exotic Lowther, and so am unable to, intuitively or otherwise, determine whether this design could be downsized to fit my pair of FE166en. Even if I were enticed to swing a pair of FE206en, I'm feeling a bit blind on how it might work. Cheers,
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Old 17th December 2012, 11:54 PM   #28
xrk971 is offline xrk971  United States
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I ran across the Hedlund horn that looks a lot like this design. Maybe this was inspiration? It has a driver chamber and throat though whereas Koho's design is throatless.

http://www.vt52.com/diy/diypage/hedlund/hedlund.html

Useful design theory here

http://fullrangedriver.com/singledriver/horn.html
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Old 18th December 2012, 12:43 AM   #29
KoHo is offline KoHo  United States
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Hi
Zen Acousta is inspiration by Lowther 116 Acousta and Hedlund, just following the original 116 acousta horn dimension, without re-calculate.
I did so many testing to build the Hedlund horn and 116, around 6 pair.
I think the key not only the dimension, but also the"Plywood".
Wood as the soundboard like piano, develop the sound tone and low frequency.

FE166 or FE206 may a good choice for replace Lowther.

some of my Youtube video as refer

Field Coil Lowther Horn Speaker - YouTube

Thank
KoHo
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Old 26th December 2012, 02:15 PM   #30
JLG46 is offline JLG46  United States
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Yes those are the ones i want to build KOHO!! do you have plans for them?
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