LX521 with software DSP

I’ve just finished building a pair of Linkwitz Labs’ LX521 loudspeakers.  They’re everything I could want: 4-way, dipole radiation, with active crossover and eq.  They sound amazing.  Previously the best speakers I had heard were the Pluto 2.1.

What I’ve done differently is to implement the xover/eq with a digital processor, which runs in software on a small pc.  I did this using only open-source, free (as in beer) software, plus a bit of code I wrote myself. Continue reading