Just the La Scala bass bins ... very quick and a great match for an Oris.
Ron prefers the 150's when the Vifa / Onken cabinet is employed, because the Lowthers cover more of the frequency range (at the expense of less dispersion).
In your (and my) case, owning PM2A's makes the Oris 200 a better match - better highs. We're both in luck as far as this is concerned, because a La Scala is quick (as is the 80Hz Edgar) so that the parts blend nicely with a 200.
The good news is that based on current Lowther driver ownership, one can find both a horn and a bottom unit that work well together. Bert planned this very nicely for us folks!
Cheers,
Thom @ Galibier
