Cheap tweaks...What would YOU reccomend?

AC, of course. Speakers don't work on DC. Its the alternating of the current in the coils (dynamic speakers) that makes the speaker move back and forth (the principle is different on electostatic spekers, but still depends on the alternating of the voltage). If you attach a battery (9v), which is a source of DC, to the speaker it will move to one position, front or back, depending on its polarity.

Now do you understand why it is nonsense to talk of negative and positive conductors and using different types of materials for these supposedly different conductors?

Salut,

for people that wear eyeglasses is to take them off! a most noticable improvemnent for free.
next-the hifitommy toysRus turntable isolation tweek. four toysRus arm floaties (for kids arms while in the swimming pool) under the tt or under a mdf platform under the tt, adjusted for levelness. the cartridge will no longer hear the cabinet it sets on. the real benefit is that it is so pretty!
this is so much better than a single ring because it is rock stable.

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

I think I may have heard of this one long ago, but a gentleman pulled it on me last night and damned if it didn't work! When playing a CD, put the player or transport on pause for a few seconds before you start playing it (or if you want to see if you can hear the effect, do it while it's playing). Don't know why, but focus of the images improved noticably, usually after the first try, sometimes it took two pauses. Go figure!

Here's a very cheap tweak; it cost me nothing!

After posting a write up of my 2-channel only system on Audiogon, which included pictures of the room, a couple of readers suggested removing the television from between the speakers. It's now in a different room altogether. The result was improved clarity, a touch more air and a major reduction in a sibilance problem I've been chasing interminably.

Another cheapie tweak is to buy a small bubble level and use it on everything. Source components, shelves, speakers, etc. Leveling the CD transport made the most noticeable difference. The sound became more relaxed and had less hash and grain. The change was enough that now everything except the cables have been leveled. I tried to get them straight, but no matter what I did they drooped...