sub wiring question

yes it has auto EQ, i have 2 SPL 800 R

Use the speaker level inputs, it lets the flavor of your main amp come through the subs amps and blend better with your main speakers.

speaker level input has lelf and right so which one should i connect, because im using two subs , do i need to use biwire or just single wire

i have readed the SMS1 manual last night and i thoght it is hard to use but i try to read more and more , im using bookshelf apair Jm lab micro be , im happy with the sound but after i have readed the REL manual , they say it is better to use with SPEAKER INPUT , but mine are VOLODYNE , so any different between VOLODYNE sub and REL sub? the VOLODYNE manual does not recommend which input is better , so please advise which way the best without affecting the performance of the amplifier

Any idea anyone ?

can you tell me what exactly SMS1 do ? i try to read SMS1 manual over and over again, does it really improve the sound quality?

thanks for everyone feedback