New MOFI speaker (Andrew Jones)

+1 @mapman 

One of the big challenges in designing the speaker was to have a 10” woofer respond high enough for the 1.6 khz crossover point (the speaker must have a bandwidth much higher than this point even with a 12 db/octave slope).  That makes it quite impressive that some vintage 18” drivers can operate way up beyond this point.  

Apparently, Hoffman’s iron rule plays here but the trade-off seems too steep. I am on board with @jjss49 in regards to the sensitivity and the ability to use warmer, lower power amp with SP 10. Don’t know if this is a wishful thinking that someone (if not AJ himself) could eventually come up a design with a breakthrough to Hoffman’s rule, i.e., nice 7-8 inch coaxial woofer/tweeter in a SP-8 cabinet that goes down to sub 40 hz and >=90 dB sensitiveity. I’ll jump on it.  Buchardt has  almost done that even in a smaller closed box.

Not all speakers rated at 87db perform alike. My Atalante 3 monitors are 87 db and  my JBL 4319 are 92db and when I listen to the Atalantes, the volume is turned up only 1 to 1.5db to get the same room filling sound. That's 3 steps on the volume setting if I need to go up 1.5db. Any decent amp will reach levels you wouldn't want to listen to.

As for the bass, the JBLs are -6db @38Hz and the Atalantes are -3db @ 44Hz and it took all of 2 minutes to adjust to the sound of the bass. In fact, it's more tight and defined but not as overpowering. 

All the best,
Nonoise

GET THEM !