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In Reply to: RE: Isn't that "4th order Bessel" w/o and "6th order Butterworth" w/(active) BAF? (nt) posted by Steve O on May 12, 2017 at 10:47:15
802 S3 specs found in the manual. It is 4th order Butterworth crossover network.
If a thing's worth doing, it's worth doing well
...the 801M Series II spec states exactly as what you posted regarding crossover alignments. However...........in the discussion section of the 801 users manual preceding spec tabulation: "It should be noted that the loudspeaker may be used perfectly satisfactory without this additional [BAF] filter giving the system a fourth order Bessel alignment." In the case of the 801, the BAF is actually a S&K 2nd order HP filter with fc~20Hz and Q=2. All this is consistent with 4th order Bessel w/o BAF and 6th order Butterworth w/BAF. I assume, maybe incorrectly, that the 802 is same basic design w/diff fc.
Without the add on BAF, it is a 4th order Bessel.
My reason for posting was the glaring inconsistencies between Users Manuals, Spec Sheets, back of speaker markings, and everything else.
The B&W 801 & 802 Matrix (of various iterations) are/were some of the most widespread loudspeakers on the planet in recording studios & other technical environments. You would ALMOST think that solid data & measurements for every possible configuration would be reliably available on the internet.
...OTOH, the Internet is much overrated.
Yes, they are reasonably accurate, but using a CD of various test tones & sweeps, and a crapload of alligator clips, and resistors that haven't been officially "calibrated," and mediocre multimeters, and...
Yeah - simple measurements & actual hookups/cable swapping confirm that in my particular setup, using the A&B front speaker connections to bi-amp the B&W 802 Matrix S3 (with the "A" outputs driving the mid/tweeter terminals, and the "B" outputs driving the bass terminals) not only sounds better, but is also the most stable connection (as also verified by the manufacturer of the POS (well, not THAT bad) receiver that I am driving them with.
Hey, speakers are like sausage making. If it sounds good don't ask how it's made. Just enjoy them.
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