Hybrid 2-Way

[KeithL]

Has anyone been succesful building a 2-Way using a fullrange driver crossed over 200-400hz to a 7,8 or 10" driver to handle the low end?

[hoxuanduc]

Has anyone been succesful building a 2-Way using a fullrange driver crossed over 200-400hz to a 7,8 or 10" driver to handle the low end?

Martin King has done a well documented design combining a fullrange driver with a 15-18 in driver on an open baffle.

http://www.quarter-wave.com/OBs/OB_Design.pdf

Dave Dlugos (sp?) has also done a design combining a fullrange driver with a 7'' woofer

http://www.diyaudio.com/forums/full-...ions-fast.html

They are both very well received.


Duc

[philiparcario]

i had some luck with this as a 2 way then it morphed into a 3 way.



http://techtalk.parts-express.com/album.php?albumid=51

I first used the jordan with a morel tweeter, then with the lcy ribbon then I added the scanspeaks for more bottom end. Jim made a nice jordan / tweeter speaker his write up is around.

[DS-21]

I've done such designs with 3 widebanders: the Vifa 10BGS (MG10MD in the US, I believe), Aura NS3, and Vifa TG9. Woofers varied, but as long as the woofer has low inductance and clean response it's not that important.

Such a design is way smarter than the typical 2-way, because you avoid the power response errors in the midrange that form the sonic signature of every single flush-tweeter 2-way out there.

It is not ideal, however, for two reasons. First, because of the narrowing directivity up top, it's still a sweet-spot device, rather than a speaker that can fill a listening area with high-fidelity sound. Second, the widebanders tend to be both low-efficiency and low-power handling. So they will not be the equal of many speakers of equivalent size in terms of dynamics and freedom from power compression.

[killa]

Some hi vi full ranges might work well paired with the tang band 6.5 in. subs. Both low efficiency drivers and if sealed and eq'ed you could have a small box with good low end output.

[Deward Hastings]

You might look at the Linkwitz PLUTO

http://www.linkwitzlab.com/Pluto/Pluto-2.1.htm

as a variation on this idea, although the crossover is substantially higher.

All "full range" drivers compromise either the top or the bottom (and usually both). The NSW2 used in PLUTO puts (almost) all the compromise on the low end, but it could reach perhaps an octave lower than it is used in PLUTO if mounted on a baffle that kept its radiation 2pi through its operating range.

[Mayhem13]

Second, the widebanders tend to be both low-efficiency and low-power handling. So they will not be the equal of many speakers of equivalent size in terms of dynamics and freedom from power compression.

Low power handling.......most.....but low efficiency? As compared to what?
Here's an out of the ordinary for Tang Band that's 95db but only 60w thermal...........http://www.parts-express.com/pe/show...number=264-893

As the Op inquired, what if crossed in the 150-200hz range to a low inductance clean 8-10" woofer? Surely 30watts and 95 db would chase most that valued their hearing outta the room.

[DS-21]

I was assuming a modern, competent (sub-4") widebander (e.g. Aura Whisper, Aura NS3/Dayton ND90, the Vifa or Peerless units, Audience A3, etc.), not some retro-looking thing with a whizzer.

[Deward Hastings]

not some retro-looking thing with a whizzer.

Aw . . . come on . . . I bet it would make the best sounding AM table radio evah . . . perfect with that 2A3 output stage . . .

[Mayhem13]

I was assuming a modern, competent (sub-4") widebander (e.g. Aura Whisper, Aura NS3/Dayton ND90, the Vifa or Peerless units, Audience A3, etc.), not some retro-looking thing with a whizzer.

So Fostex full rangers aren't modern or competent either?

[gowa]

I recently seen a 2-way using Seas L18 and a Seas coaxial on the Salk forum but I can't seem to find it. Maybe someone here knows about it.

[DS-21]

So Fostex full rangers aren't modern or competent either?

None of the ones I have heard, no. Well, the little one (FE83 or FE103, don't remember) was OK but is outclassed by the similar-sized drivers from Aura/Dayton, Peerless/Vifa, and others.

[KeithL]

Has anyone heard this design.......

http://www.diyaudio.com/forums/multi...dx7-2-way.html

[philiparcario]

I recently seen a 2-way using Seas L18 and a Seas coaxial on the Salk forum but I can't seem to find it. Maybe someone here knows about it.

i did a version of the seas coxial



http://www.madisound.com/catalog/pro...oducts_id=1353


I used a model that was discontinued a few years back. Had a black poly cone cost about 80 a driver. in a 1/2 cu ft box ported very nice bass for a small box. I have some photos.

[philiparcario]

this was the cone.


http://www.seas.no/images/stories/vi...9_p17rexxf.pdf


nice bass into the 55hz range good for a 1/2 cu ft box. used a 18db x over crossed near 3k