Which Tweeters to go with these Woofers?

[mortron]

In a previous thread, I noted that I had some drivers I was looking to use, and have decided to pair up some 10" Eminence designed woofers from an old speaker cabinet, with a pair of tweeters to make some 2 ways. I had contemplated 3-way design, but didn't want to invest too much into them, and wasn't sure the cost/benefits of going 3-way over 2. I am open to suggestions

The woofer I want to use has the following specs, and I am told it plays unto 3500hz. I am not sure if it is a Beta, Alpha, Delta or what, but it has been made for Yorkville.

05-RE OHMS 7.14 13-FS HZ 52.69
06-LE MH 1.11 14-MMS GMS 28.00
07-QM 6.20 15-CMS mm/N .3255
08-QE .430 16-RMS NS/M 1.4974
09-QT .410 17-VAS LTRS 54.38
10-XMAX MM 2.40 18-SD SCM 344.88
11-BL TM 12.35 19-EBP 121.4
12-EFF % 1.77 20-SPL dB 94.5

I was told that a vented enclosure near the VAS tuned to the FS and a tweeter (with crossover I assume) would make a decent speaker.

This is the tweeter I planned to use. It looks fairly smooth and extends low enough to crossover with the woofer I believe.

Tang Band 25-302SH 1" Shielded Neodymium Dome Tweeter 264-804

What do you all think? I thought of Econowave, but that gets expensive fast, hence the dome tweeters. Any suggestions or help is appreciated. I have never made speakers before, just worked on a few.

[18Hurts]

Normally you want a tweeter that is louder than the woofer,

The 10" is 94.5dB at 8 ohms so this tweeter would do it at 96dB at 4 ohms. If it's too loud, just pad it down with a power resistor to taste.

Vifa BC25SC06-04 1" Textile Dome Tweeter 264-1028

$12 each and should work well with the 10" although NOT for PA use.

[mdocod]

I'd go for a comparession horn, you'll be able to get a lower x-over point and the result will be much more cohesive dispersion transition from the woofer to tweeter. Maybe try to steel a horn and circuit selection from another similar installation and make padding adjustments to compensate for differences.

Eric

[mortron]

So Econowave? The first suggestion I had considered but I wonder if the tweeter goes low enough smoothly? I'm not sure what the woofers response curve would look lole, i assume its spiked in the mids a bit like some of the other 10" Eminence drivers I've seen. unless Yorkville wanted to smooth those out when they spec'd it?

[bwaslo]

Going low enough smoothly isn't a problem, it's more a matter of having directivity control low enough (as well as being able to go low enough, period!). But if you did an Econowave with the 'deluxe' waveguide (the QSC that is now sold at Parts Express) along with a D220ti or DE250 driver, you can cross over at near 1200Hz pretty readily which should work fine with a 10" driver.

[mdocod]

Naturally, a 10" driver is going to have directivity of ~90 degrees at ~1000-1200hz range and will start to get pretty noticeably "on-axis peaky" by ~2K. When dealing with a single woofer, especially a single 8-10", many 1" compression drivers can be mated pretty low because you're going to be attenuating them by 15-20dB anyways, so there is more room to get some bottom end out of them (careful use of attenuation bypass and such to shape the curve).

The problem of course, is price. Decent drivers start around $50, well respected constant directivity horns with good bottom end loading start around $30-45. Lower x-over point is also slightly more expensive due to higher component costs.

[sreten]

Originally Posted by mortron

I was told that a vented enclosure near the VAS tuned to the FS and
a tweeter (with crossover I assume) would make a decent speaker.

Hi,

It would make a speaker, but decent ? not really. Unless you have
low powered amplifiers your wasting your time with high efficiency
PA or musical instrument type drivers for hi-fi speakers.

Building a good speaker is far more complicated than you seem to
imagine. A good 2 cuft (internal) enclosure is a major undertaking
and it could be put to far better use than with the Eminence.

rgds, sreten.

[mortron]

Originally Posted by sreten

Hi,

A good 2 cuft (internal) enclosure is a major undertaking
and it could be put to far better use than with the Eminence.

rgds, sreten.

Like???

[system7]

I've got to admit that my early attempts to use PA speakers for anything resembling high fidelity were a bit of a disaster. Happily I adapted huge boxes with a removable front baffle screwed onto battens which allowed me to try several units, but I threw in the towel and just fitted 15" Tannoy full-rangers, which were terrific!

Efficient PA speakers can sound very hard and harsh, but at least you are considering getting the volume just right.

IIRC, for Reflex B4: Vb=(15 X Vas)X(Qts^2.87), F3= (0.26X Fs)/(Qts^1.4)

I get around 60L there, and F3 of 50Hz. That Vifa tweeter that 18hurts suggested looks doable with a couple of attenuator resistors and a third order on the tweet @2.5 to 3KHz, 2nd order on the bass, probably Linkwitz slope:
2-Way Crossover Designer / Calculator

The 10" units will beam a lot at crossover, probably break up a bit at 2KHz too, and I don't know if they really like working on anything other than closed box of around 30L which wouldn't give you much bass anyway. But it's fun to try stuff.

[mortron]

What about using the single pezio tweeter, and 200 watt mono amp that came with the drivers, adding the $38 Selenium compression driver and a 3 way crossover to make a mono ghettoblaster/party in a box?