Vifa/Dayton/Dayton... First speaker for me, finally! - diyAudio
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Old 9th November 2006, 04:56 PM   #1
alexcd is offline alexcd  United States
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Default Vifa/Dayton/Dayton... First speaker for me, finally!

Here's the plan so far...

TMWW

Midbass/Woofer = 2xDayton RS270, 30-600Hz
Midrange = Dayton RS52, 600-2.5kHz
Tweeter = Vifa XT25, 2.5kHz-40kHz

My restrictions is that the above mentioned drivers need to be powered by LM4780 or LM3886 gainclones. I have already built one of these amps and it sounds amazing. I will also be using an active crossover design ala Linkwitzlabs.

Another driver to replace the midrange and lower the tweeter XO point is the Peerless 5.5" exclusive but this significantly lowers my total efficiency which may be a problem with the gain clones.

Usher 9845 2" Textile Dome Midrange??

I am also trying to do this under a tight budget. Comments?
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Old 10th November 2006, 01:20 AM   #2
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Regarding the budget issue, Hi-Vi DMB-A mid domes only cost about $25 each and they are reportedly superior to the Usher, with similar specs frequency wise. Sensitivity is 92dB
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Old 10th November 2006, 01:54 AM   #3
alexcd is offline alexcd  United States
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Wow, those are a good deal.

Zaph has some small drivers measured on his page and that is one of them. The RS52 seems to have a flatter response and lower distortion. I guess that's the trend with those aluminum Daytons (low distortion.) But, is that the end all of making a decision? I'm an engineer by trade so I'm used to pick things by specifications. Audio is not so easy.
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Old 10th November 2006, 02:21 AM   #4
v-bro is offline v-bro  Netherlands
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A first speaker and allready a three way eh?

For the same budget I think there are better sounds achievable...
And a lot easier to start with, a two way....

Or will you copy some kind of design?
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Old 10th November 2006, 12:31 PM   #5
alexcd is offline alexcd  United States
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This is the first design that I've done and actually kept it for myself. I've done two 2-ways, one 3 way (active crossover,) and countless subwoofers. So I'm not a noob by most people's standards.

There a benefits to 2ways and 3ways. I am trying to minimize Doppler distortion by using a dedicated midrange. It's nice to get opinions about drivers that people have used. That's what I need in this case.

I'm looking for a natural, smooth but dynamic with no slop type sound.
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Old 11th November 2006, 05:00 AM   #6
v-bro is offline v-bro  Netherlands
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Quote:
Originally posted by alexcd
I'm looking for a natural, smooth but dynamic with no slop type sound.
In this respect I prefer planar units...

I've once listened to 3-way ACR isostatic RP200 speakers, very convincing true, natural, detail, imaging, dynamic and timbre. (two 20cm woofers and two Swiss made magnetostatic devices for midrange and highrange) They weren't expensive, but a bit higher budget than your plan....

But ESLs........

On the other hand I do read very positive things about that xt25, but usually prefer cone midranges...http://www.diyaudio.com/forums/showthread/t-55859.html

I do own two vifa 75mm domes, but they're real crap...

Dynaudio d52 mmmmmm! , but I guess they're not around anymore...

Cheers!
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Old 29th November 2006, 10:54 PM   #7
Jay_WJ is offline Jay_WJ  United States
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I'm thinking of a similar project to yours. I also chose the RS52 but XT19 as a tweeter for better off-axis response. The tweeter crossover will be around 3kHz to 3.5kHz. I think 2.5kHz for your XT25 and RS52 is a bit lower than ideal.
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