Originally Posted by Charles R
I do the same. Before running MCACC I power on one at a time to level match them (using a RS sound-level meter). Then I treat them as one sub which isn't an issue since they are identical and located in the same relative place (they are built into the fronts - 10" powered sub and 12" passive radiator).
Charles R.......that's the same way I do it. I had to go back in after I ran MCACC and knock down the vol setting in the SC....probably about 3db. I was a little concerned because my measuring position (which is also the main listening position) isn't equi-distant from the subs. The rest of the SPL I got fine tuned individually in each sub (again using the RS SPL meter) by using each sub's gain level.
MCACC set up actually split the distance between the two from the measuring/listening position, which is probably what I'd do if I set it manually.
I was also a little concerned that by splitting the LFE channel with a Y connector, that the signal would be degraded enough that neither sub would get enough of a signal to work properly. That was unfounded, though.
Thought it would be a bit tricky since the Phoenix is an 18" with 2-4" down firing ports. While the MFW uses a smaller driver (15") with a front firing slot port. I've heard some say that using multiple subs require you to use the same sub. That wasn't an issue, either.
MacFan.....the placement of the subs to where they sounded best happened to work out that way. That said, I had to replace an end table with the MFW. There just wasn't room for both. I'm having a piece of glass cut for the top of it so it does double duty as a sub and an end table.
I was using an Elemental Design eQ2 to tame some peaks. Now, I don't need to use EQ as everything smoothed out nicely by using two subs. I've got lots more headroom. Much more slam. And integration with my mains sounds much more seamless.
Haven't measured how low they go. But, my ears tell me I'm well below 15 Hz....especially with music that has information in the subsonic range.
While it makes no sense, I'm finding that I'm lowering the volume on the SC, playing the same material as I was before.
All-in-all, one of those ideas that actually paid off handsomely. That's something that I can't say regularly when I make changes in my HT.