10" two way

[johnmark]

The Seas CA26RE4X and the 27TBCD/GB-DXT look like candidates for a possible 2way if crossed at 1300-1400hz

Has anyone thoughts on this combo.

I always liked the sound of a 10" two way for classic rock and these drivers might make a nice larger stand mount/ bookshelf type speaker.
Maybe a variovent type enclosure to keep volume reasonable.

I would assume a higher order crossover would be required but I could be wrong.

Thanks !


John

[ttan98]

I am building one now, a good 2 way will sound very good, look at 2 way from AudioKinesis amd from Proac.

My design relies on similar concept from AudioKinesis, horn top end and 10" driver Alnico(fairly old from Japan) I bought 2nd hand, sounds pretty good compared with other drivers.

Cheers.

[MJL21193]

Originally posted by johnmark
The Seas CA26RE4X and the 27TBCD/GB-DXT look like candidates for a possible 2way if crossed at 1300-1400hz

Has anyone thoughts on this combo.

Hi John, I'm John too.

There are a couple of things that come to mind: First, I would avoid a crossover point in the 1.3k area as it is in the range where our hearing is most sensitive.
Second, I would think twice about crossing a 10" that high.
Third, the tweeter you've picked will not cross that low.

[infinia]

Hi

The Bad
The Le is high... (3 mH due to 4 layer VC) and will be a problem if used in a higher order filter at 1.3KHz. You could zobel, but would have to model it to be sure for 4th order acoustical. You would have to use a special tweeter at 1.3 KHz.

The Good
But you could try it without using a LF crossover. Offaxis and onaxis responses are almost on top of each other which is great for matching the dome tweeter directivities at the Xover.
You could use a 2nd order HP for tweeter to match woofers natural 2nd LPF. Now you could cross the tweeter a little higher at around 2 KHz or so.

Mms... is low
Bl... is high
Sensitivity is high

No Ugly


edit > not for super Hi Fi as some woofer breakup's around xover
but could rock on pop music.

[speakerdoctor]

A number of classic AS speakers that originated in New England were 2-ways with 10 inch woofers. Advent, KLH, AR, etc...
Typically, they had simple 1st order inductors on the woofers crossed in the 1khz range.
You'll need a tweeter with a very low Fs and high power handling that will stand up to the rock, which I suspect will be played on the loud side.

[alspe]

Interesting design. I have also that kind of speaker in my mind.

I think 10" would be too big if driver isn't very low mass by cone. 8" would give much more alternatives. How about nice 8" driver which has smooth responce to even 5000 Hz? At least 4000 Hz so it could be crossovered in area where ear isn't so sensitive.

Good:
SPL match, tweeter vs. mid, easier crossover ?
not much compression in low frequensies
"warm" sound, bold lower midrange ? (suitable for old rock etc)
2-way design would be _near_ full range (30-20000 Hz)
2-way is always good design

Bad:
loss of detail in mid range?

I have heard Acapella High Harlekin which is large 2-way with dome tweeter and about 10" bass/mid in large closed enclosure. Bass is very solid, not boomy even a hint but go low when asked. Cabinet may be like 50 litres.

[Moondog55]

I have used 10inch midrange and broken all those rules with out ruining the soung BUT best suited to Rock&Roll , I crossed at 4k and as these were party speakers no-one ever noticed the defects off axis, I have a very similar set with 8inch drivers crossed at 3k and both have very similar sound signatures, MTM format so this may not apply to single driver boxes.

http://www.flickr.com/photos/25510659@N07/2431709093/

Very high "Q" drivers 0.86 and that is an aperiodic box of 120litres never got around to painting them

[johnmark]

All good points.....

Passive xover might be a challenge.
If I can get my hands on the data files for these drivers I could plug into a simulator and play with responses first. I wonder if Seas has data files to share?

Otherwise I could start by playing with an adjustable active xover and at least try out a few xover points. Sure would be easier to go active.

John

[planet10]

World Audio Design has a pair of aperiodic kits that use a 10" SEAS & tweeter. Scott and i did up an alternate Classic TL enclosure.

http://wduk.worldomain.net/acatalog/SpkrKits.html



dave

[Godzilla]

Very cool Dave and Scott! I wonder how this much cheaper speaker compares with the Audio Note speakers of similar size?