2-way, fullrangespeaker..

[daneman]

may it be possible to build a very good speaker combining these concepts? - possibly, i think. but i would like to hear your opinion about it.

i want to build a 2-way-speaker with an AMT and a high-sensitive woofer.
and for the woofer im dealing with the idea to take a good fullrange speaker. (or a widerange-, means goes linear up to some kHz)
1. because a lot of these offers good sensivity.
2. the AMT can go down to 2kHz and in this range fullrangespeakers are usually very well performing trough lightweight membrane.
3. better impulse-response (ok, i guess, just the ability to handle higher frequencies shouldn´t be the reason for better impulse response at lower frequencies - maybe the higer f is realised partial vibrations out of phase.. maybe?)

finally my question: do you mean it´s an advantage to use a fullrange woofer in a 2-way-system?

best regards,
Daniel

[DcibeL]

What driver did you have in mind?

Using a large driver at high frequencies can create beaming issues, generally the larger the driver the poorer the off-axis performance.

[jaencer]

If your tweet goes down to 2kHz, there's no reason for a fullrange (ie. up to 20k) woofer. Most regular woofers will go up to a few kHz, the problem is: the larger the woofer the better the efficiency, and the worse the highs. For a 2way, I'd maybe go with an 8in woofer. If you want efficiency, looking through parts-express or whatever, go to the "loudspeaker" drivers in "pro-audio". Those always have light cones, high SPL, and enormous magnets.

[daneman]

well, i want to realise my high-end-system with those ideas at the start:

tweeter: AMT -down to 2kHz

woofer: high-sensitivity 5-8" to accord with the AMT.

the AMT offers a very good impulse response, so i´m searching for the very best suited woofer. and as there is no transmission of deep frequencies necessary (3-way finally), i thought, a high-sensitiv widerangespeaker might be the best to accord with the AMT.
well, i have the half-baked idea a widerange speaker may offer better performance (better impulse-response) also at deeper frequencies. -maybe i´m wrong...

PS: off-axis performance is a point i should care about too, thanks.

rg
daniel

[DcibeL]

Maybe Jantzen Audio JA8008?

[daneman]

dcibel,
Jantzen Audio speaker seem interesting. didn´t know this label. they are a choice for me beside high-sensivity woofers like beyma..

thanks
daniel

[DcibeL]

The JA8008 is a very unique driver designed by Troels Gravesen.

[mlise]

I wanted a high efficiency pair to go with 4 watt 300B SET's I made. After a couple of trys I came up with Selenium ST324 slot tweeters and Eminence 12" Red White and Blues Patriots. They're loaded in horns, so the xmax doesn't matter. The pattern is really wide with no beaming. The response has a bump up at 1K which could be knocked back down in the crossover, but I was shooting for maximum efficiency. The result is bright, but really easy to get used to. If I recall, crossover was at 2K, but could have been somewhere up to 4K-sorry, I don't remember, but I could check.
All the wood in the whole thing is 3/8" and 15.5" wide. Makes cutting really easy, just rip sheets of plywood into 15.5" strips. Every cut is either 90 or 45 degrees. The slot at the throats is 3". There's a pillow sized glob of fiberglass in the box. It's a really easy project and sounds great. The bass is pretty decent too. You can figure it all out from the photo.
Even if you don't build the horns, the drivers actually sounded fantastic just stuck in the middle of a 4' square of plywood. My big spending audiophile friend was really cranky when he saw my old weather worn scrap of flat plywood shame his $10K speakers.

Regards

[CLS]

Sounds interesting but can't see the photo.

[mlise]

Hi,
Let's try this again. Total height is 72.5". all the pieces are 15.5" wide of 3/8" plywood.

Regards.