8'' two-way any reason why not?

[Jeff B.]

Re: 8'' two-way any reason why not?

Yes, yes, yes... AUDAX!!!
That's what I'm looking for now... Audax [and Vifa] 6.5" and 8" midwoofers!!!

GC

Well, it's not Vifa or Audax, but you might consider this one:
http://www.madisound.com/catalog/pro...roducts_id=834

And....I have heard many 8" two-ways that sound very nice. Some of the objections are just folks getting too caught up in the technical, in my opinion. The listening, however, can be very satisfying.

[gowa]

Re: 8'' two-way any reason why not?

Jeff, I was looking at that one a few months ago. Mad has a kit which uses that woofer in a 2-way but the woofer is on top.

[Steve Henry]

Re: 8'' two-way any reason why not?

I have to agree with Jeff. Although it is an MTM, my recently completed Dayton 8's have consistently had friends and relatives going out to their cars to get their favorite CD's. Or the next time they visit, I hear "Can I play this on your speakers?". Sometimes we need to just enjoy, instead of trying to think about why not.

[bobblickle]

Re: 8'' two-way any reason why not?

This woofer might be a decent high-value match to the horn jcap is talking about: http://www.parts-express.com/pe/show...ewRand=2551180

That might make a really neat and sensitive midsizer. This paper woofer sure seems to be in the spirit of the thing.

bb

There is a dirty little secret about small woofers. To get any bass they need a long excursion. If highs, mids and lows are mixed in the same woofer, the lows cause the “Doppler Effect” on the mids and more so on the highs. When the cone is moving 10 to 20 mm to produce good bass it will modulate or cause tonal shifts in higher frequencies produced by it at the same time. The Doppler Effect can be reduced in a 2-way by setting a low crossover frequency, perhaps 1KHz or lower and use a broad band horn for the mids to highs. Below are some suggestions from the PE catalog as a start. Good luck.

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=264-235

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=264-315

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=264-306

Coil and Cap:

http://www.parts-express.com/pe/pshowdetl.cfm?PartNumber=255-426&DID=7

Two of the following caps:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=027-932

To really feal the bass, this option be attached to the floor or bottom of a chair:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=299-028

Here's one site to calculate your own values:
http://www.the12volt.com/caraudio/crosscalc.asp

[CW Lindsey]

Re: 8'' two-way any reason why not?

My current project is the mark audio alpair 5 and the css sdx7 in a pe .50cf cabinet. I am still working on where to cross them at,but it looks like I am going between 740 to 800 hz. I should have this done soon.. I will then find out how these extreme range small drivers sound paired with larger woofs.I will post pics and results then. btw, these little things are just totally cool looking.

[robert]

Re: 8'' two-way any reason why not?

Hey...the SEAS is on sale, actually 3 bucks cheaper than the F8's. Well behaved and smooth, too. That is another contender for certain. It would be interesting to see what people come up with doing a little backward step...

Cheers / Robert

[Guest]

Re: 8'' two-way any reason why not?

http://www.thielaudio.com/THIEL_Site...CSwoofers.html
http://www.thielaudio.com/THIEL_Site...fspecsheet.pdf

cheers,

AJ

[dthomas]

Re: 8'' two-way any reason why not?

http://www.thielaudio.com/THIEL_Site...CSwoofers.html
http://www.thielaudio.com/THIEL_Site...fspecsheet.pdf

cheers,

AJ

That Theil woofer is an oem of the Vifa P22. Great woofer.....

[tombrennan]

Re: 8'' two-way any reason why not?

As has been noted at one time 8" 2-ways were quite popular, then 6.5" 2-ways became more popular. A 6.5" driver is cheaper and goes in a smaller (cheaper) box.

Many speaker companies are expert at making a virtue of necessity, thus claims about better dispersion with a 6.5" woofer. Of course this ignores the fact that most speaker makers have little or no real concern about controlling directivity and are content with whatever willy-nilly directivity their Madisound catalog tragic domes provide.

An 8" 2-way can provide much better dynamics and lower distortion than 2-ways using smaller woofers and give a more robust tonal balance too. Better dynamics and tone and lower distrtion usually sounds good to me.

If one is really concerned about dispersion you could place the 8" woofer behind a 6" wide slot, thus giving wider dispersion. Years ago Rogers made a 2-way with a 12" woofer and an Audax dome with the 12 placed behind a slot about 10" wide, it was a good idea.

30 years ago I was making nice sounding 8" 2-ways with Audax bextrene woofers and Peerless dome tweets.

[Fred T]

Re: 8'' two-way any reason why not?

That Theil woofer is an oem of the Vifa P22. Great woofer.....

I think it has the P21 frame but It was developed for bass use so I doubt its suitable for a 2way.


Solen still has some of these SEAS CA21REX treated paper 8 inchers.They should work well in either a sealed or vented 2 way.

http://www.solen.ca/pub/cms_nf_catalogue_fiche.php?id=535&recherche=&numRows=&manufacturiers=&niveau1=&niveau2=&niveau3=

http://www.seas.no/images/stories/vintage/pdfdataheet/h0333_ca21rex.pdf

[Deward Hastings]

Re: 8'' two-way any reason why not?

Great idea but what always bothered me with this approach is that off axis response above 5KHz is really poor.

I always thought that too, but when I finally got to hear the Linkwitz PLUTO (which uses a 2" tweeter) I moved around the room a lot trying to observe the "deficiency", and could not identify it in any reasonable listening area. Way off to the side, yes . . . but as long as I was between the speakers I couldn't hear any problem.

[Guest]

Re: 8'' two-way any reason why not?

I think it has the P21 frame but It was developed for bass use so I doubt its suitable for a 2way.

Hi Fred, please forgive me, I'm quite easily confused. What does "It was developed for bass use so I doubt its suitable for a 2way" mean exactly, in terms of measured/physical reality?
Are you unsatisfied with the high frequency on/off axis behavior, smoothness of roll off, etc? Are there anomalies in the possible xo midband region? Is the low inductive rise due to the copper rings problematic, etc, etc.? Could you be a bit more specific/less vague?
Just trying to learn, thanks.

cheers,

AJ

[Guest]

Re: 8'' two-way any reason why not?

Hey Tom (Brennan)

What happened at Lexington? You pull a Ferris Bueller on us? I called out your name in class....;)

cheers,

AJ

[Jed K.]

Re: 8'' two-way any reason why not?

Yes, I was thinking the same. The off axis seems to be lacking in this type of driver. These look interesting but not much info out there yet.

http://markaudio.com/alpair/6/round

I tested that little guy and have one for sale. It's an interesting driver.

[augerpro]

Re: 8'' two-way any reason why not?

Are you going to post the results Jed?