Margaret's audio gourmet thread was fun. That gave me the idea for this
one.

Rate each component in the audio chain by percentage of importance in
the overall sound or enjoyment of your system. For the sake of
argument, assume a well-recorded source (CD, LP, etc.) with no physical
problems.

Speaker
Room interaction with the speaker
Speaker cable
Power amplifier(s)
Preamplifier
CD/DVD player
Audio interconnects
Power cords/power conditioners
Stand
'Tweaks'

For those who listen to vinyl:

Turntable
Tonearm
Cartridge
Phono preamp

For those who listen to tubed equipment:

Tube brand or type

Feel free to add items that I overlooked, or to disregard any of these
that I've placed on the list if they have no importance to you.

Here's mine:

55% Speaker
10% Room interaction with the speaker
0% Speaker cable
4% Power amplifier(s)
5% Preamplifier
4% CD/DVD player
2% Audio interconnects
0% Power cords
0% Stand
2% 'Tweaks'
3% Tube brand or type
4% Turntable
2% Tonearm
6% Cartridge
3% Phono preamp