It took about three months after installation for me to start noticing the effect as described.

Also, whenever I remove and reattach the cables or this accessory, the sound right after installation is quite bad. The presentation becomes flat, the sense of air disappears, and it sounds very noisy. However, if I leave it for a while, it improves quickly, and by the next day it always returns to normal.

They arrived with a critical path manufacturing defect and were returned to Bybee

These are interesting right from the start. I had to turn down the volume to play at my normal level. They seemed to make everything sound brighter, but after few hours settled down into a wonderful array of music. Floor noise lowered , sound staging was wider, instruments were more natural. The music flowed better. These are certainly worth the purchase price. Highly recommended.

These little buggers are amazing. They add richness and a sense of realism to the sound.