Cheap tweaks...What would YOU reccomend?

DAKIOM feedback stabilizers which control vibration electronically is the BEST tweaks you can have and I have 30 plus years of tweaking experience and a former high end home theater installer and electronic tech. I have used dbx, omnisonic imagers, hughes, srslabs,bbe, behringer, carver sonic holography, peavey, aphex and many other sound processors, dakiom stablizers coupled with any of these sound processors including acoustic research tds 202 is the cheapest and most effective tweaks in cleaning and expanding the soundstage of a system. Tube rolling is also helpful in solid state. Cables makes very little improvement unless your gear is that high up in the food chain. For the most part, most cables are just for aesthetics

I have my amplifiers and preamps on BRICKS or stone slabs which helps vibration. I also use the controversial dakiom feedback stabilizers for negative feedback vibrations. Room treatment is something I'm staying away from due to being too costly but worth it if you have the funds. You can use cheaper alternatives but to do proper room treatment, it's for those with the budget. My favorite tweaks however are called sound processors such as pro gear like behringer, bbe, dbx, peavey and some of the older srslabs, hughes, carver holography, from sonic maximizers to graphic equalizers on solid state gear. I keep tube PURE and CLEAN with no interference from equipment because sound processors add distortions or too much links in the chain.