biamping with 75 watt solid state and 18 watt tube amp.klipsch rp600m...t

75watt and 18watt amps will have different gains.  How are you going to adjust for that?

biamping 400 dollar a pair speakers with tubes and solid state - haha

suggestion - for better sound, get better speakers!!  

have fun!

"...suggestion - for better sound, get better speakers!!..."

The bookshelf Klipsch with a nice Musical Fidelity integrated would be a nice little system. 

Get amps with a pair of balls. 
 18 watts? Really? That’s like baseball with a whiffle bat. 
 18 watts, 75 watts,..........this is your problem!

 

"Get amps with a pair of balls.
18 watts? Really? That’s like baseball with a whiffle bat.
18 watts, 75 watts,..........this is your problem! "

the OP is using a pair of Klipsch bookshelf speakers and they have a sensitivity of 96 dB.....so a amp with 75 wpc is more than enough.

so this is not his problem.....his problem is something else.

OP needs to check their email.