Bypassing BZLS

[masfe]

Hello

I'm planning to build a balanced zen line stage preamplifier to work with two aleph 5 monobloks. But in order to use the aleph amps with an existing home-cinema preamp, I need to bypass de bzsl. This way the alephs will receive the signal directly from the home cinema preamp.

I'm going to use a 4 pole switch (on-on) to bypass the BZLS circuit without the need of turn it on and, at the same time, conecting the negative of each channel to earth because the output of the home cinema preamp is unbalanced.

I've made a scheme of the whole thing (attached below) and, since my electronics knowledge is rather poor, every advise will be welcome.

Sorry for my bad english and thank you.

masfe