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Has there been any inexpensive item that enhanced your system's sound?

For me it was an inexpensive power cord that was laying around for years, a Pangea AC9.  I have it connected to my Yamaha A S2000.  I've tried the stock cord on the Yamaha and then some of my other cords, (Wireworld, VH Flavor 4, Acronlink/Oyaide custom cord and a MAC). I've had lots of amps and integrated amps over the years, and this is the first time the Pangea contributed to making better sound. It surprised me because I had tossed it aside and forgot about it.  Power cord performance is such a crap-shoot and dependent on so many other variables in the audio chain.  Any inexpensive item you've come across that enhanced your system's sound? 
foster_9
wlutke
733 posts
 
Having my vintage JMW tone arm and junction box rewired with Nordost Valhalla 2. The cost for labor, wire and return shipping from VPI? $150. The improvement over the original Discovery wire? Phenomenal. I laughed out loud.
nutty
2,950 posts
 
nonoise,
+1 on the Ayre CD. It 

N
slaw's avatar
slaw
22,089 posts
 
Original Magic Eraser for your stylus every now and then.
Zerodust stylus cleaner.
A correctly measured for height, Herbies washer under your lps.
Machina Dynamica springs between your support structure and your favorite platform for any of your electronics.
I've also found the Maestro outlets superior to the Porter Ports.
Cleaning your electrical contacts.

slaw's avatar
slaw
22,089 posts
 
Tightening your speaker driver screws.
Spending time positioning your speakers.
lynott
87 posts
 
Schumann Resonance Generators
Isotek Full System Enhancer and Rejuvenation Disc
Bags of lead shot on top of subwoofer
Herbie's Tenderfeet and Big Fat Dots

All of the above have provided worthwhile results for not a ton of money.
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