The FF85K Sprite - Page 2

chrisb · 8th July 2009, 05:37 PM

Quote:

Originally posted by kazoo
Just to chime in I made a pair of the uFonkens a while back. I needed some computer speakers at work. These are the perfect size to sit on the the desk. I have been listening to them for over a month now about 8 hours a day. These sound great. No fatique at all listening to them. The reason I have not posted pictures because they are still in plywood. I have not had a chance to veneer them. I will soon hopefully. But if anyone needs a computer speaker or is looking at a speaker in the 3" range these are the ones to get.

John

John, out of curiosity:
what amp are using, and are you driving them from the computer sound-card, or higher up the food chain? (i.e. outboard USB DAC, etc)?

Jim Shearer · 8th July 2009, 05:43 PM

The FF85k's are now broken in and sounding amazing! As noted above MJK came over to check out the F120a Metronomes, but took time out to have a listen to the Sprites. While the Sprites may look butt ugly and have no WAF, they sound GREAT!

That doesn't mean that I have abandoned the micro-Fonkens--those are under construction. On the other hand, my enthusiasm for the FF85k has me planning two, more extensive builds for next summer using this very special driver.

So little time. So many speakers to build...

ped · 8th July 2009, 06:29 PM

Hi Jim,

Glad the FF85k's are working out for you. If you were going to build a "regular" enclosure for these based on the calculations you made, what would be the particulars? For the 1.77 liter volume you mentioned earlier what would be the port size and resulting tuning freq / F3?

Jim Shearer · 8th July 2009, 07:06 PM

Hi ped,

I tossed out the calc. I did based on the Weems book, but a quick visit to Madisound for their link to an on-line calculator yielded the following:
V(box)= 1.82 liters
F(box)= 104 Hz
Ripple= 0.02 dB
F(3)= 96 Hz
Port D= 1.06"
Port L= 2.59"
Port area= 0.83 sq. in.

Not identical to what I figured out from Weems, but close enough.

Cheers, Jim

chrisb · 8th July 2009, 10:00 PM

Quote:

Originally posted by kazoo
Just to chime in I made a pair of the uFonkens a while back. I needed some computer speakers at work. These are the perfect size to sit on the the desk. I have been listening to them for over a month now about 8 hours a day. These sound great. No fatique at all listening to them. The reason I have not posted pictures because they are still in plywood. I have not had a chance to veneer them. I will soon hopefully. But if anyone needs a computer speaker or is looking at a speaker in the 3" range these are the ones to get.

John

uFonkens in Macassar Ebony, along with Kingrex T20U amp & power supply - and iMac..

http://homepage.mac.com/tlinespeaker...en-0v9-map.pdf

kazoo · 9th July 2009, 05:06 AM

"John, out of curiosity:
what amp are using, and are you driving them from the computer sound-card, or higher up the food chain? (i.e. outboard USB DAC, etc)?"

Chris,
Nothing fancy running them. I have a Philips micro system that is a 5 disk changer. So I listen to CDs mostly but it also has an AUX IN that is plugged to the computer to listen to MP3s. The computer has a standard sound card. One thing that amazes me is the sound stage on these, especially the channel seperation. It could be how close I am sitting, but I do like the way these sound.

John

kazoo · 9th July 2009, 05:11 AM

I have some curly/burl maple that is awaiting my pair. Like I said great little speaker and yours in Macassar Ebony look beautiful.

John

Quote:

Originally posted by chrisb

uFonkens in Macassar Ebony, along with Kingrex T20U amp & power supply - and iMac..

http://homepage.mac.com/tlinespeaker...en-0v9-map.pdf

VDV · 10:50 AM

What type of demping material should i use in uFonkens and how?
I'm listening to them without any demping material, the sound has got some king of sreaming side.
I have been listening ff85k for about a year in closed box and 18W8531 in vented box with XO around 1k hz, now i'm building uFonkens and SP95

SS and fostex are a bad match.
The bass from uFonkens is just right.
Thanks.

planet10 · 4th August 2009, 09:02 PM

Quote:

Originally posted by VDV
[B]What type of demping material should i use in uFonkens and how?
I'm listening to them without any demping material, the sound has got

Medium density cotton or wool felt, line side, back, top, top of port shelf, baffle below the driver, and optionally the bottom of the holey brace. Do not obstruct the vent exit.

dave

VDV · 4th August 2009, 11:24 PM

Can i use padding polyester?
I need to kill standing waves?
Sorry for the rotated picture, i cannot change my message yet.

8th July 2009, 05:43 PM	#12
Jim Shearer diyAudio Member Join Date: Jun 2007	The FF85k's are now broken in and sounding amazing! As noted above MJK came over to check out the F120a Metronomes, but took time out to have a listen to the Sprites. While the Sprites may look butt ugly and have no WAF, they sound GREAT! That doesn't mean that I have abandoned the micro-Fonkens--those are under construction. On the other hand, my enthusiasm for the FF85k has me planning two, more extensive builds for next summer using this very special driver. So little time. So many speakers to build... __________________ A day without music is like a day without food.

8th July 2009, 07:06 PM	#14
Jim Shearer diyAudio Member Join Date: Jun 2007	Hi ped, I tossed out the calc. I did based on the Weems book, but a quick visit to Madisound for their link to an on-line calculator yielded the following: V(box)= 1.82 liters F(box)= 104 Hz Ripple= 0.02 dB F(3)= 96 Hz Port D= 1.06" Port L= 2.59" Port area= 0.83 sq. in. Not identical to what I figured out from Weems, but close enough. Cheers, Jim __________________ A day without music is like a day without food.

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8th July 2009, 06:29 PM	#13
ped diyAudio Member Join Date: Apr 2003 Location: PA	Hi Jim, Glad the FF85k's are working out for you. If you were going to build a "regular" enclosure for these based on the calculations you made, what would be the particulars? For the 1.77 liter volume you mentioned earlier what would be the port size and resulting tuning freq / F3?

9th July 2009, 05:06 AM	#16
kazoo diyAudio Member Join Date: Feb 2005 Location: Illinois	"John, out of curiosity: what amp are using, and are you driving them from the computer sound-card, or higher up the food chain? (i.e. outboard USB DAC, etc)?" Chris, Nothing fancy running them. I have a Philips micro system that is a 5 disk changer. So I listen to CDs mostly but it also has an AUX IN that is plugged to the computer to listen to MP3s. The computer has a standard sound card. One thing that amazes me is the sound stage on these, especially the channel seperation. It could be how close I am sitting, but I do like the way these sound. John

4th August 2009, 11:24 PM	#20
VDV diyAudio Member Join Date: May 2007	Can i use padding polyester? I need to kill standing waves? Sorry for the rotated picture, i cannot change my message yet.

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