Cary Audio Design Xciter - Manual (Page 16)

OPERATION
15
BREAK-IN PERIOD
The tubes, capacitors and output transformers take approximately 100 hours use to settle in for
peak performance. The CAD
Xciter will sound good right out of the box but it will improve
within a short time. After the first 50-100 hours you will notice increased depth and tighter bass.
This break-in period is characteristic with quality vacuum tube audio amplifiers.