8 or 16 Ohm Driver to mate with 6681B

[3GGG]

I am about to pay for a pair of the new run of Fane 8m's. I received my near mint Yamaha 6681B drivers today, which are 16 ohm.

Without knowing the sensitivity of the yamaha mated to a 350hz Le Cleach horn, and the sensitivity of the Fane in a 200hz Le c=Cleach horn I am unsure wether to order 8 or 16 ohm Fane drivers.

I like the simplicity of a passive horn setup, but no doubt will go active and compare the two.

I assume the Fane will have a lower sensitivity, than the CD, would the 8 ohm version be more suited?

[picowallspeaker]

Those are professional drivers , and to reach high SPL they are used paralleled and stacked ,in arrays .. So to maintain an easy load to any amplifier ,at least you can parallel 4X16 Ohm units to give a reasonable 4 Ohm- 1000 W load to it.
If you're gonna use two different amplifiers ,the thing is negligible as you can correct each gain ,but in a passive set-up a 16 Ohm load requires half the current than a 8 Ohm load ...so I guess it's going to be much more attenuated than if it was an 8Ohm load ....( EDIT : superwrong sentence : take it as it is !!!)
I would choose the 16 Ohm version ,even if it requires double values for the low-pass... mmmh...double resistance , different Damping Factor ,NO ,NO , 8 Ohm is more 'universal'...
Some one else would have responded : IT depends...!!

[3GGG]

I have two Aleph J's nearly ready to go, ill need a third for high range duty, tweeter to be decided still.

Am i correct that if used in a passive way, with out adding resistors to change the loading(eg Lpad) the 8 would be better suited?

[picowallspeaker]

No ,sorry ,I don't understand this move : woofers undertake the duty of reproducing the most powerful transients ( ok: tweeters takes much part in those ) and most of the music content , and you're going to attenuate them .
Sizing the amplifiers for a multi-amp system should give you the guiding line
for correct power requirements ...about 70 % to wf and 30 % to tw .

With a 16 Ohm load the amplifier will distort much less , but the amplifier would reach its max power with an higher gain .

But then math and physics come to aid ,before buying something ,you can
simulate the finished system , including each little bit .
Power ,gain ,efficiency ...
So stay in s-by as someone more cultured than me may come around

[3GGG]

I hope to not have to attenuate the woofer.