interconnects vs speaker cables vs power cords - which make the biggest difference?


Like the subject line says, I am curious what others think in terms of whether interconnects, speaker cable or power cords make the biggest difference when it comes to noticeable sound improvements, or are they all equally important?  I am thinking of upgrading them all and am trying to decide how to allocate spending.  Thanks in advance.
ccandte
OP,  Lots of good feedback here, based on my experience and feedback from cable manufacturers, 

1) Power cords
2) Speaker Cables
3) IC's
Equally important. You cannot get any sound unless you have connected power and speakers and source to amp.
I’m surprised by the number of responses that place power cords first. Let’s further define that by asking with our without power conditioning of some type?
the position in the chain is unimportant

what matters is whether the thing behind the cable can be affected by a cable with complex impedance, the current and voltage level of the signal, etc.

all of those point to speaker cables (kudos to the wag who pointed out that speaker placement was more important than any of the 3 choices)

speaker cables can especially affect the sound of certain speakers

Here is what to do re all cabling (and if you do not understand electronics or science, then it is my special magical secret advice):

rund digital as far as possible, then run balanced as far as possible, then use monoblock amps set as close to the speaker as possible and do not worry about the brand of the wire

speaker cables should be short and fairly thick (usually 16 AWG); use gold-plated interconnects and coat all connections with Caig products

make and break the connections every couple of years and if you are tempted to spend more than $200 on all cables combined (for a normal sized home) then just hit yourself in the head with a hammer
Hi falconquest,

I also agree that power cords make the most sonic difference, with or without a power conditioner. For the record, I use a SR Powercell 10UEF/FEQ and the power cord between it and the wall makes the most difference IME. Digital sources would be next.

Dave