I did the following test.
1. Installed an isolation transformer (Plitron). The electrical inspector said that it was the cleanest power he had ever seen outside a generating station.
2. Change in sound was obvious: crisper, clearer, cleaner.
3. Borrowed two expensive power cords. Each made a slight improvement over factory cords when using wall power; but neither was as good as factory cord plus isolation transformer.
4. When plugged into the isolation transformer, the expensive cords made no improvement over the factory cords.
5. Conclusion: save up for an isolation transformer, IF you can locate it outside the listening room. That is important because they tend to growl when doing their job, which is cleaning up the power and protecting your equipment from DC.
YMMV
Good luck!
1. Installed an isolation transformer (Plitron). The electrical inspector said that it was the cleanest power he had ever seen outside a generating station.
2. Change in sound was obvious: crisper, clearer, cleaner.
3. Borrowed two expensive power cords. Each made a slight improvement over factory cords when using wall power; but neither was as good as factory cord plus isolation transformer.
4. When plugged into the isolation transformer, the expensive cords made no improvement over the factory cords.
5. Conclusion: save up for an isolation transformer, IF you can locate it outside the listening room. That is important because they tend to growl when doing their job, which is cleaning up the power and protecting your equipment from DC.
YMMV
Good luck!