I have 4 Tripp Lite Isolators which are isolation transformers, 3 250W units for $65 each and 1 500W unit for $100. All original manuals are included.
SHIPPING IS FREE within the US via Priority Mail.
I feel like I've tried every power conditioning solution known to Man. Running Springs, BPT, Blue Circle, Audio Prism, Alan Maher. These Tripp Lites are the only thing that cut the EMI/RFI noise out of my system all the way. This may be because of the ground to neutral bonding them employ. They sound surprisingly wonderful. I use the 500W unit with my Bryston amp.
Originally I plugged my noisy appliances like my computer and refrigerator into them and that worked great until I discovered how much greater everything sounds with my gear plugged straight into them. Plus you can use multiple units to isolate your gear from each other.
Some of them show some signs of light oxidation but only if you examine them very closely.
The 250W units will not include their original boxes because I don't have a box big enough to go around them. The 500W unit will be shipped in its original boxes only. All will be excessively bubble-wrapped. I'm a very careful shipper.
No extra fee for PayPal.
I am selling them because I'm moving to Australia.