PMC and what electronics ??

He is contemplating of getting another two units of 4B-SST since the speakers can be tri-amped.

That would be overkill. The Vifa midrange on the EB1i has a very small magnet (240 grams) with low Xmax and FOR SURE the tweeter does not need 200 watts...

I'd suggest your friend looks for much smaller powered amps for the tweeter and midrange - a much lower powered class A might be the ticket.

FWIW: It is definitely worth triamping as you can remove IMD distortion (distortion bleeds from one bandwidth to the next when you use a passive crossover and a single amplifier that is trying to send several AMPS to the Woofer but barely a milli-amp to the tweeter)

Mvwhiting,

Are there measurements published for the GB1i. The predecessor appeared to has some strong resonances on the mid/woofer, possibly due to the TL?

I must say that my favorite two way speaker from the 80's was Energy Pro 22 which also has a very low crossover (1.8 Khz). I see you crossed over at 2 Khz! This enables you to avoid the beaming that occurs in nearly all large woofer/mids above about 1 Khz.

The success of the GB1i speaker despite the bumpy frequency response (see link) suggests that WIDE EVEN DISPERSION is extremely important - perhaps a lot more important than ruler flat frequency response on axis.

For this reason, I suspect I still prefer three way designs and your company makes some of the best studio three ways in the business (by far).

Care to comment on the Gb1i design and the unusually low crossover?