Know of a "Dirt Cheap" tweak?

This doesn't help in every system, but this made a very audible improvement in my system. You need a voltmeter and a cheater plug(s) that will let you orient the ac plug(s) in either standard or reverse polarity. I made my own and used a grinder to remove metal from the thick sides of the ac adapter plug. Test the chassis voltage by touching the hot lead of the voltmeter to bare metal on the component chassis and the ground lead to a ground. Orient each component plug in the manner that gives the lowest voltage reading. I only had to reverse my cd player (Cambridge Audio CD4se.) It REALLY tightened up and extended the bass noticeably. Midrange sounded a touch more coherent and integrated.

I had a problem with Sibilance with my Perreaux amp...the T's and S's sounding much too harsh and opaque. Then, a guy from this site named Sean who is a professional sound engineer set me up with Mobile Spec interconnect cables that were fifteen bucks a pair. I think this must be used in radio applications. He said that when he engineered the sound for several big name bands, he uses these as Sibilance busters. Plainly put, I COULD NOT BELIEVE THE DIFFERENCE. Sorry to harp time and time again about these things, but I think they just buried my more expensive audio interconnects. BURIED THEM. Others have theorized that what has happend is that the cables are poorly designed and they act as a filter for certain high frequencies. I don't know, maybe, but they made my solid state sound much more like my tube amps. And I could not notice any loss of detail. Mobile Spec Performance cables. Don't know where you can get em. Ask Sean.

See my DIY thread under the heading "Best wires for cost". The design that I explained costs less than $3.00/ft, yet it has beat up many $400.00 per meter cables, really!

Spend $35 for a copy of Robert Harley's book. "The Complete Guide to High-End Audio" (2nd Edition). There is so much great advise in there about absolutely everything it will be the best $35 you ever spent.

Sand in zip-lock bags to be placed on top of cd players, dac, speakers even sides of turntables to add some weight, this will cut down on vibration.