Neofone and Foster

[verk]

Try the Neofones in a BIB if you have the room, I did, and the result is quite stunning. They really do need a super-tweeter to open up the top end, but in the BIB they are reasonably flat down to about 35Hz. I used a Fostex FT17H with Fostex R80B L-Pad with 1uf Obligatto cap. They sound much, much bigger than that little driver has a right to. After about 50 hours the Neofones have smoothed out, and really impress.

The BIB Thread with Neofone measurements.

http://www.diyaudio.com/forums/showt...t=#post1086817


Verk.

[sumacSK]

Hi Verk,

So how they compare to your Fe166 horns???

Thanks Martin

[_henry_]

hi verk, nice to see someone already enjoying Neofone's


u have pic of ur speaker? i like to see it, especialy with fostex ribbon.

is it possible to do ml-tl with neofone?


thanks

[Scottmoose]

Yes. I came up with one a while back somewhere but I lost the information & graph[s] after a crash. I 'ates Microsoft, and all their works. I'll see if I can dig it out.

[_henry_]

Pinging Thorsten

i accidentally erase ur email to me before i read it, so pls if u be so kind to send me another one


thanks for helping, btw.

[planet10]

Originally posted by Scottmoose
Yes. I came up with one a while back somewhere but I lost the information & graph[s] after a crash. I 'ates Microsoft, and all their works. I'll see if I can dig it out.

Here is the one posted (in the latest iBIBk-style)... be nice if the Zd was more optimum a little higher off the ground.

dave

[Scottmoose]

Nice one Dave.

I don't think we can shift the driver though as-is. Nominal ideal is basically the 0.416 Martin established for a 1:10 taper line, but that's far too high up for this box. Perhaps with this longer line, if a higher driver position is needed, it'd be best the usual way up, wit the karlson sliced in the top. Should still work the same way -just loading th eupper, rather than lower corner.

[planet10]

Originally posted by Scottmoose
Should still work the same way -just loading th eupper, rather than lower corner.

I'm trying to avoid that... my upper corner is 17" up and opens into another room...

dave

[Scottmoose]

Ah. I take the point. Bit of a tricky one, that.

How about starting the internal baffle about 10in (or whatever is desired) up from the base & adjusting the other dimensions accordingly? That should lift the driver up while preserving the Zdriver location & the line length. Like my abominable drawing below. Normally this layout with the raised starting point of the line would need the back cutting away at an angle (which leads me to believe this is what TC did with his last, inverted 108 BIB cabinets) to keep a flared, rather than a straight, final section, but the Karlson should also sort this out, along with the other potential benefits. This could potentially be very good, with a rapid final expansion.

[G]

Originally posted by planet10


Here is the one posted (in the latest iBIBk-style)... be nice if the Zd was more optimum a little higher off the ground.

dave

Dave have you had a chance to build one of the iBIBk boxes to have a listen?