Cheap tweaks...What would YOU reccomend?

I've been very impressed with those ultralight Neuance shelves under my CDPs (made a HUGE difference under the Rotel, and a more subtle improvement in coherence with my 44lb EMC-1 MkII). Far greater bass articulation and PRAT than inner tubes.
Also, the LAST thing you want to put under your speakers is an air cushion! Spikes, rollerblocks, THIN sorbo between
satellite/base sections are all great, but the object is to optimize the coupling to the floor...not isolate it (as you would do with other components...especially front end ones).
Have fun! Ern

Bmpnyc,
My sidewalls are windowed (L), or a fireplace (R), with stuffed furniture. A more WAF-acceptable trick is to simply grab one of the large square throw-pillows we have and prop it up
onto the back of said sofa or stuffed chair, thereby quashing most of the first reflection at tweeter level. If I forget to plop 'em back down an occasional visitor thinks they're there as headrests! Works like a charm.
Ern

Turn off refrigerator! The improvement will melt you away!
(And your ice cream...)

Fpeel, I understand there's a new product called Hardwire to be marketed by Pfizer. You apply it to your cable(s) one hour before each performance, and it lasts the whole night!
Cheers.