Happy Holidays and Your Favorite Tips?

Yes, the crossover designer can raise or lower the Q of the speaker wether ported or sealed, but how would an end user go about raising/lowering Q of a sealed speaker?

I meant, a speaker maker can make a sealed or ported speaker optimally flat (rare) or bump the bass.  This is mostly a function of the cabinet though, not the crossover. 

Don't overlook acoustics, electrical noise, equipment isolation and damping

Everything matters.

Do something nice for someone else, even if it's just to make them smile.

Don't sell short what you already have, thinking the audio grass is greener somewhere else. Chances are you'd be making a sideways move more often than not. Try some subtle tweaks, cheap room treatments and experiment with cables but until you're financially ready to go bigger (in price and level of performance), just be content: it's not the end of the world.

Oh, and Happy Holidays! 

All the best,
Nonoise

Tip- build and tweak your system to your liking, not someone else’s!  

If you have a room on floors the are not concrete base, address any vibration issues you undeniable have, especially with the turntable, then the speakers. Even with concrete floors, it can't hurt.