Patrick--the LF part of the signal going to the "High" input gets filtered out by the internal XO in the speaker. Same with the HF part of the signal going to the "Low" input of the speaker.
In my situation, the internal speaker XO can't be taken out of the path, nor does ML recommend use of an active XO, b/c the internal XO is really part of the ML Force Forward design. I gather there are some phase issues that go haywire with an active XO.
Perhaps I should have just bought "bigger" amps. But, I started with one that I had, and got a real good deal on the second one, so reality enters the picture (i.e., buy another VT100Mk III for $3K, or sell my one VT100MkIII for $3K and dump at least $6K beyond that on a pair of VTM200s). I can't bridge them to mono, and, even if I could have, I gather there may be bad issues with bridging resulting from halving the effective impedence seen by the amp, especially aggravated by complex low impedence loads like ESLs.
My rig sounds better now to my ears. Maybe that is because the loads presented to the two amps are easier to drive, even without bi-amping with an active XO. I have to believe the load presented by a high pass filter and an ESL panel is significantly easier for an amp to deal with than the load presented by a XO networked to an ESL and a conventional driver.
In my situation, the internal speaker XO can't be taken out of the path, nor does ML recommend use of an active XO, b/c the internal XO is really part of the ML Force Forward design. I gather there are some phase issues that go haywire with an active XO.
Perhaps I should have just bought "bigger" amps. But, I started with one that I had, and got a real good deal on the second one, so reality enters the picture (i.e., buy another VT100Mk III for $3K, or sell my one VT100MkIII for $3K and dump at least $6K beyond that on a pair of VTM200s). I can't bridge them to mono, and, even if I could have, I gather there may be bad issues with bridging resulting from halving the effective impedence seen by the amp, especially aggravated by complex low impedence loads like ESLs.
My rig sounds better now to my ears. Maybe that is because the loads presented to the two amps are easier to drive, even without bi-amping with an active XO. I have to believe the load presented by a high pass filter and an ESL panel is significantly easier for an amp to deal with than the load presented by a XO networked to an ESL and a conventional driver.