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Custom DIY 8" Fullrange Driver
Custom DIY 8" Fullrange Driver
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Old 5th December 2017, 02:16 AM   #61
benb is offline benb  United States
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I've wanted to make my own DRIVERS for about 45 years now! This absolutely gives me inspiration, though even if I do it what I make is unlikely to be this good.
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Originally Posted by ICG View Post
Any measurements yet? How much excursion/overhang/underhang?

You've put the leads on to the opposite side of the cone joint, which is nice for the balance. It would be better though, if the leads would be a lot closer to the VC, that reduces unsymmetrical forces/movements within the cone, especally with very low losses surround.
I've always wondered about that. I've seen at least one driver with the leads on opposite sides of the VC. The leads and connection on the cone definitely add some points of mass on the cone, making its mass non-uniform, which is surely detrimental.
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Old 5th December 2017, 02:20 AM   #62
benb is offline benb  United States
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Originally Posted by ghemml View Post
Thanks.

I must say, it is very difficult to measure small gauge wires DCR. The thin ends contacts makes it very difficult to crimp with crocs clips and I always end up values that are not constant
Make each end a little longer, scrape the insulation off and solder to larger wires that the alligator clips can easily grab onto. After measuring, you can cut the solder ends off, and do the rest of your assembly.
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Old 5th December 2017, 03:09 AM   #63
zman01 is offline zman01  Bangladesh
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Custom DIY 8" Fullrange Driver
ghemml,

Congratulations on getting your drivers to the audio show.

How did you find the interest around single wide-band driver speakers?

What sort of cabinet do you the drivers in (e.g. bass-reflex or other).
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Old 6th December 2017, 02:02 PM   #64
ghemml is offline ghemml  Singapore
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Quote:
Originally Posted by benb View Post
Make each end a little longer, scrape the insulation off and solder to larger wires that the alligator clips can easily grab onto. After measuring, you can cut the solder ends off, and do the rest of your assembly.
It is still quite difficult, any small amount of extra enamel wire gives extra ohms

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Originally Posted by zman01 View Post
ghemml,

Congratulations on getting your drivers to the audio show.

How did you find the interest around single wide-band driver speakers?

What sort of cabinet do you the drivers in (e.g. bass-reflex or other).
Thanks.

Yes it is a bass reflex, I did design a slightly more fancy vintage box which is also a bass reflex. But the finished product came in later. Mostly I concentrate on speaker driver design and fabrication, less on enclosure
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Old 7th December 2017, 03:34 AM   #65
ghemml is offline ghemml  Singapore
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IMG_20171127_224118.jpg
IMG_20171127_224157.jpg

A sample of the phenolic surround which i had laser cut recently from the leftover material.

It will be fun to test out how well they perform compared to conventional surrounds like foam or rubber.
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Old 7th December 2017, 12:31 PM   #66
IG81 is offline IG81  Canada
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That phenolic surround is neat, but I can't see it being used for anything but OB, since there will be major leakage. Unless you planned some sort of thin film over that to seal it?
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Old 7th December 2017, 04:26 PM   #67
ghemml is offline ghemml  Singapore
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Yeah, I will think about that, or use felt material to cover over it.

But at the moment those gaps are 1mm wide, I will test them out first without sealing or covering them up.
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Old 15th December 2017, 01:03 PM   #68
DYNABLASTERTUNERS is offline DYNABLASTERTUNERS  Serbia
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Wow great stuff, beautiful driver!
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Old 23rd May 2018, 01:50 PM   #69
ghemml is offline ghemml  Singapore
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My new custom built field coil 8" fullrange. Just only completed the testing on the electromagnet on 12vdc, will need see if I could get a enclosure for this driver for other measurements.


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Last edited by ghemml; 23rd May 2018 at 01:55 PM.
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Old 23rd May 2018, 02:23 PM   #70
perceval is offline perceval  Taiwan
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Now that's a bezel!

Got some T/S params to share?

Keep up the good work!
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