Newbie question.
PD154 work good up to ~1,2 - 1,5 kHz? I want used with 2" driver (BMD-750) in 2 way, active crossed with DCX.
Cabinet 110l net, fb: 50Hz f3: ~50Hz modelled in bassbox. Good idea?
No the 154 will not work well up to that frequency, it really is a bass driver and not designed to do mid. Something like the PD153ER would be better. There are a few similar drivers from other manufacturers.
What you should look for is, what I call a standard bass speaker. These "normal" bass speakers will usually go to 2K, and be reasonably efficient. 3 or 4" coil models are usually available.