The r spec are out now. So its 272 of the regular lm301b diodes and 16 red diodes.
They dont say what the spectrum is for the 272? The older qb288 v2 is only in 3k and 4k .
I have 4 qb132 @ 3k and 4 @ 4k . both running around 200w for 200$
I want to add 100 more watts using one r spec v2 288...