#1
I am looking for a tube amplifier and playing loud is not an option for me.

I was wondering if I could plug a tube amplifier head (15W) into my Boss Micro BR which has a cabinet simulator ?
Fender American Standard Stratocaster/Seymour Duncan Hot Rails
Seagull Rustic
Fender Hot Rod Deluxe
MXR GT-OD
MXR Distortion III
MJM London Fuzz
EHX Big Muff
#2
Ummm no. That will blow out both pieces of equipment. Get a tube combo with a headphone output and use that.
Telecaster - SG - Jaguar
Princeton Reverb, Extra Reverb
P-Bass - Mustang Bass
Apogee Duet 2 - Ableton Suite