DSJR
Major Contributor
I'm stunned frankly, that a speaker range such as this suffers no deep bass extension yet the TL cancellation between 100 and 200Hz is still there. Ancestors IMF's larger models had prodigious bass extension and output but the 150Hz or so issues were disguised somewhat by pulling the mid and high frequencies down somewhat to match it, leaving the 20 - 100Hz region up in level. The later RSPM IV, in addition to having switchable lf filters, damped the bass extension more and this minimised the 150Hz-ish dip somewhat. PMC don't seem to care about this TL characteristic and leave it blatantly there. The rise and rise at hf is again deliberate and maybe to attract B&W customers? There's usually a deep 'scoop' in the lower kHz region as well. For such an exalted company, I don't know what the heck is going on with them, although in a large room I liked the powerful energetic Fact Fenestrias which did entertain and involve, despite any response anomalies.. Even these seem to roll off below 80Hz - surely not right?