what to think about when matching pre and amp


im new to tube amps. i hear one have to think about sertain things when matching a preamp with an amp. is it the sensitivity or.. as an example im thinking about buying a Conrad Johnson ls17mk2.. and i can also get a CJ premier 11a. how do i know they match? these would probably match since theyre the same brand.. or..can i think that way. please help
hifimannen

Showing 2 responses by hifimannen

thank you. but how do i know that? if i had not already chosen CJ units.. say i have chosen an amp, and are looking for a preamp to match.. what do i have to look for?
ok, thanks. deep down i was really wondering if i would wreck something if they dont match in some way