Tiny Vifa tweeter question

Decker · 29th March 2010, 07:21 PM

Anybody know the Fs of the little Vifa TW 269A tweeter that Mr. Pass was giving away at the Burning Amp festival 2 years ago? I have been scouring the Web, and found that it has a 6 ohm impedance, but couldn't find any other data.

vdi_nenna · 29th March 2010, 07:33 PM

Do you know anyone with a WT3 (woofer tester) from partsexpress? I think it can test tweeters also. I'll run a tweeter thru mine tonight and see if it is close to manufacture's spec. Great tool for $100.

Nelson Pass · 30th March 2010, 03:27 AM

It was a clearance part out of Parts Express a few years ago,
so I bought 1,000. Clearly made for auto sound application,
it has about 86-87 dB sensitivity and I use it at 10 KHz and
above with Pioneer Bu20F20 full ranges to sweeten the top.

They also make for party favors at BAF.

vdi_nenna · 30th March 2010, 02:12 PM

If it's a 1" tweeter, it's a safe bet to keep the crossover point above 2k and higher if it is smaller. Some 6 Ohm can go a bit lower, like 1800Hz.

This is the discontinued line at Tymphany: Vifa | Tymphany
They have picture. Maybe you can spot your tweeter here.

Good luck

Decker · 30th March 2010, 03:17 PM

I'm going to try them with a LR 2nd order crossover at 3500 hz with a Pioneer B20. I'm putting these in a pair of old Allison 7 boxes. The woofer is mounted on top facing up. The tweeter is mounted on an L shaped piece of pipe over the middle of the woofer. Kind of like the speakers demonstrated by Mr. Linkwitz at the last Burning Amp festival in Sausalito. Everything except the crossover is done. Will report back after I get them running.

Decker · 30th March 2010, 10:14 PM

Ooops! I just noticed that Mr. Pass said [I]86-87[I] db efficiency, not 96-97. I thought that they were approximately the same sensitivity as the Pioneer woofers. Back to the drawing board!

woody · 31st March 2010, 07:25 PM

The Pioneer Bu20f20 is 90 db.

Decker · 31st March 2010, 07:38 PM

Seriously? The Parts Express catalog (where I bought them) lists them as 94 db1W/1m. Now I'm all confused.

woody · 31st March 2010, 09:53 PM

Which model did you get. There is a B20gr30-51F, B20fu20-51F and B20FU20-51FW
Seems they wanted that to get confusing! By the way the one with the 93db sensitivity only goes up to 2.5k.

Nelson Pass · 31st March 2010, 10:52 PM

I have measured them as 91, but this is in the region of
300 Hz to 1 KHz. Most FR's bounce around above this
region, although the Pioneer declines rather gently. At
10 KHz or so it's a pretty good match with a 1 uF cap. Not
very bright - just a little sugar on top.

29th March 2010, 07:21 PM	#1
Decker diyAudio Member Join Date: Jun 2004 Location: San Francisco	Tiny Vifa tweeter question Anybody know the Fs of the little Vifa TW 269A tweeter that Mr. Pass was giving away at the Burning Amp festival 2 years ago? I have been scouring the Web, and found that it has a 6 ohm impedance, but couldn't find any other data.

29th March 2010, 07:33 PM	#2
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	Wt3 Do you know anyone with a WT3 (woofer tester) from partsexpress? I think it can test tweeters also. I'll run a tweeter thru mine tonight and see if it is close to manufacture's spec. Great tool for $100. __________________ I build, therefore I am.

30th March 2010, 02:12 PM	#4
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	If it's a 1" tweeter, it's a safe bet to keep the crossover point above 2k and higher if it is smaller. Some 6 Ohm can go a bit lower, like 1800Hz. This is the discontinued line at Tymphany: Vifa \| Tymphany They have picture. Maybe you can spot your tweeter here. Good luck __________________ I build, therefore I am.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Vifa xt25 tweeter	Per Nielsen	Multi-Way	67	12th March 2010 05:58 PM
Vifa Tweeter Selection	Ivan2006	Multi-Way	20	4th June 2008 12:02 PM
tweeter attenuation on Vifa XT question?	fazman	Multi-Way	1	31st August 2005 09:35 PM
Nice little Tweeter from Vifa	dkxdn	Multi-Way	0	21st May 2005 10:29 AM
any good tiny tiny tweeters?	THOR	Multi-Way	18	28th June 2004 06:42 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

30th March 2010, 03:27 AM	#3
Nelson Pass The one and only Join Date: Mar 2001	It was a clearance part out of Parts Express a few years ago, so I bought 1,000. Clearly made for auto sound application, it has about 86-87 dB sensitivity and I use it at 10 KHz and above with Pioneer Bu20F20 full ranges to sweeten the top. They also make for party favors at BAF.

30th March 2010, 03:17 PM	#5
Decker diyAudio Member Join Date: Jun 2004 Location: San Francisco	I'm going to try them with a LR 2nd order crossover at 3500 hz with a Pioneer B20. I'm putting these in a pair of old Allison 7 boxes. The woofer is mounted on top facing up. The tweeter is mounted on an L shaped piece of pipe over the middle of the woofer. Kind of like the speakers demonstrated by Mr. Linkwitz at the last Burning Amp festival in Sausalito. Everything except the crossover is done. Will report back after I get them running.

30th March 2010, 10:14 PM	#6
Decker diyAudio Member Join Date: Jun 2004 Location: San Francisco	Ooops! I just noticed that Mr. Pass said [I]86-87[I] db efficiency, not 96-97. I thought that they were approximately the same sensitivity as the Pioneer woofers. Back to the drawing board!

31st March 2010, 07:25 PM	#7
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	The Pioneer Bu20f20 is 90 db.

31st March 2010, 07:38 PM	#8
Decker diyAudio Member Join Date: Jun 2004 Location: San Francisco	Seriously? The Parts Express catalog (where I bought them) lists them as 94 db1W/1m. Now I'm all confused.

31st March 2010, 09:53 PM	#9
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	Which model did you get. There is a B20gr30-51F, B20fu20-51F and B20FU20-51FW Seems they wanted that to get confusing! By the way the one with the 93db sensitivity only goes up to 2.5k.

31st March 2010, 10:52 PM	#10
Nelson Pass The one and only Join Date: Mar 2001	I have measured them as 91, but this is in the region of 300 Hz to 1 KHz. Most FR's bounce around above this region, although the Pioneer declines rather gently. At 10 KHz or so it's a pretty good match with a 1 uF cap. Not very bright - just a little sugar on top.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read