That really depends on the spkrs rather than the amp. I'm sure the Aleph won't mind. But passive biamping is a bit of overkill -- no? Why not use a passive line level xover instead? Far better results there...
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My GPs are the original mk1 with the bi-wire posts. Therefore I was just planning to use one channel for bass and one for treble, keeping the internal crossovers. At the moment my preamp would need Y adapters (XLR) to separate the signal to the 2 amps, unless I go for a preamp with 2 sets of outputs to enable bi-amping. I've never done this before, so I hope I haven't overlooked anything! Thought it would be an interesting experiment that should yield some benefits to make it worthwhile?
The advantages of vertical bi-amping are that each amps power supply only has to drive the bass on one speaker. You will experience greater volume and dynamics, with a more effortless musical presentation. And used Aleph amps are reasonably priced.
On the other hand horizontal bi-amping, like one reply states, still requires the that the amp driving both channels of low frequencies still puts a greater demand on that amps power supply. This defeats the advantaqges. Anyway, for sonic balance both amps should be identical.
Thanks for your responses. It sounds like it could offer a good improvement in the sound, particularly with regards to dynamics and control - which is what I'm after.
The Alephs work best with the balanced XLR inputs. This will mean that I need to split each output signal from my preamp (L and R) using some sort of Y adapter. As far as I can make out, this is the only way that I would be able to connect up what would become the 2 Left and 2 Right inputs on the power amps. Does anyone have any suggestions about adapters or specially terminated XLR cables? If I can get a good adapter, that would enable me to continue using my XLR Nirvana S-X interconnects, which I am loath to part with!