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Old 24th May 2008, 08:13 PM   #1
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Default Vifa Tweeter Selection

Hi all,

I am in the process of looking for a suitable tweeter to go with the Peerless 6.5" Nomex Mid Woofer in a bookshelf 2-way design.
This will be my first speaker project. I can buy Vifa drivers quite cheaply so I think I will stick with a Vifa tweeter.

However, I am confused as to which Vifa tweeter will match well with the Peerless woofer. How do we tell by looking at the frequency graph of the tweeter and the woofer that a tweeter would crossover well with a woofer? Do we look at the amount of overlap? What should the crossover point be?

The tweeters I have in mind are:

XT19TD00-04
DX25TG-05-4
D26NC-55-06
D27TG-05-06
D27TG-45-06

Any feedback on the quality cons/pros of the above tweeters much appreciated.

Also, does anyone know where the Peerless woofer and the above Vifa tweeters are made these days?

Thanks in advance,
Ivan
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Old 24th May 2008, 10:18 PM   #2
peter_m is offline peter_m  Canada
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Vifa DQ25SC05-04 ($16)
Vifa BC25SC06-04 ($12)

Both had great review by Zaph and are inexpensive and small.

http://zaphaudio.com/tweetermishmash/compare.html
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Old 24th May 2008, 11:50 PM   #3
Jay_WJ is offline Jay_WJ  United States
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Default Re: Vifa Tweeter Selection

You won't go wrong with any of the tweeters. They are all excellent. Here are the lowest possible xover points for each tweeter:

XT19TD00-04 (2.3 kHz LR4)
DX25TG-05-4 (1.6 kHz LR4)
D26NC-55-06 (2.0 kHz LR4)
D27TG-05-06 (1.8 kHz LR4)
D27TG-45-06 (1.6 kHz LR4)

I'd personally go with DX25 or D27TG-45 crossed at 1.75 kHz LR4.
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Old 25th May 2008, 01:08 AM   #4
Jay_WJ is offline Jay_WJ  United States
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Quote:
Originally posted by peter_m
Vifa DQ25SC05-04 ($16)
Vifa BC25SC06-04 ($12)

Both had great review by Zaph and are inexpensive and small.
Yeah, distortion measurements of those two new Vifa tweeters are excellent. Along with the old D26NC55, they seem to be one of the few neo tweeters that can be crossed low without any HD issues. Maybe even 1.8 kHz LR4 is possible depending on how high SPL they can handle.
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Old 25th May 2008, 01:29 AM   #5
Dave is offline Dave  New Zealand
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The XT25SC30-04 has worked very well for me.
Just be sure that your crossover is low impedance across the tweeter terminals at the tweeter's resonant frequency. As explained here,

http://www.zaphaudio.com/ZD5.html
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Old 25th May 2008, 07:27 AM   #6
owdi is offline owdi  United States
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I vote for the D26NC-55-06, because the truncated frame will let you place it really close to the mid. You could pull of a center to center distance of 110mm, which gives you lots of flexibility with the crossover.

Dan
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Old 25th May 2008, 07:47 AM   #7
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Hello Ivan, The Vifa D27 tg-45-06 is the tweeter used in my Spica TC-60 speakers. It's a sweet sounding tweeter, although a bit rolled off on top. If you don't push it to silly loud levels it is a nice, well behaved tweeter although newer tweeters may surpass it. Hope this helps you.
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Old 25th May 2008, 08:01 AM   #8
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Hello again, How about the Peerless HDS tweeter? It seems like a winner! Low distorsion and a relatively flat response.
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Old 25th May 2008, 08:15 AM   #9
rabbitz is offline rabbitz  Australia
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Default Re: Vifa Tweeter Selection

Quote:
Originally posted by Ivan2006
Hi all,

I am in the process of looking for a suitable tweeter to go with the Peerless 6.5" Nomex Mid Woofer in a bookshelf 2-way design.
This will be my first speaker project. I can buy Vifa drivers quite cheaply so I think I will stick with a Vifa tweeter.

Also, does anyone know where the Peerless woofer and the above Vifa tweeters are made these days?

Thanks in advance,
Ivan
Hi Ivan

I've used the 830875 Nomex with several different tweeters and currently use a DX25TG-05-04 as shown in the picture. I preferred it with the SEAS 27TDFC which is a great tweeter and better than the equivalent Vifa offerings IMO. Another option is the Peerless 810921 which is a fantastic tweeter but needs a little more crossover work.... about double the price of the ones you had listed.

I'd be surprised if you can get the D27TG-45-08 as I think WES was out of them last time I enquired.

I'm a reseller of these drivers and the last Nomex I saw was made in China. All the Vifa D27TG's would have been made in Denmark and the proper D26NC would have been made there as well. I think all the later models are from China as the last XT25 I had in had Peerless on it and "Designed in Denmark".
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Old 25th May 2008, 02:58 PM   #10
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Thank you everyone for your input.

The D26NC does look positive after reading the favorable review on Zaph Audio so I am leaning towards that. However the truncated odd looking frame may prove a bit hard for me to route as I am only a beginner. Is there a short cut for this routing such a frame?

The D27TG-45-06 also seems good option as I like older drivers made in Denmark, however as I will also be getting the drivers from WES and if they are still out of stock like what Rabbitz said. Is the D27TG-35-06 a good one to use instead as I heard that it essentially the same version of the 45-06 but without the bulge plate? How about the D27TG-05-06 instead?
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