Warm up and burn in
The following is intended as a general reference to the proper setup and operation of the Chiarra amp. Every single audio amplifier will benefit from these simple steps, some of which are actually free and very effective. A little attention and work can go a very long way as far as your system's performance is concerned.
Even though the Chiarra will perform well straight away there is still considerable operational time needed for the unit to perform at its best. For enhanced sonic performance, I highly recommend you leave your unit on at all times until break-in is complete. The length of the break-in period is highly variable and dependent upon many factors. There are specially-designed CDs, such as Reference Recording's Test and Burn-In CD (RX1000) or the Sheffield and Purist Audio Designs PAD burn-in CD's that contain special tracks that help with break-in... These CD's are very good but I, personally, don't like the idea of my CD player churning away for hours on end and prefer to connect the amp to my tuner fed on a diet of radio 2 material.
As a general rule, most equipment requires several hundred hours of
playing to fully break-in. There are several factors that determine the
extensive length of "break-in", such as charging of capacitors,
establishing the electron flow on the PC board, cables, soldering joints,
etc. External conditions, such as the power quality and stability of your
power in your listening room, the kind of music you are listening to (more
or less dynamics), and many more factors will contribute to the break-in
process. It is important to note, that the more a given electronic unit
has been played, the smaller the audible differences get.
After turning on your amplifier for the first time, the unit will require
a few minutes to stabilize. The sound will be rather harsh on the higher
frequencies, and the dynamic range is rather restricted. This sonic signature
will always be apparent when you turn on "cold" components.
Third Period: After approximately 8 - 10 days of playing and being charged, the upper midrange and highs will "smoothen out". The bass will improve in speed and articulation with less overhang. The result is more even and natural tone balance.
Fourth Period: After about 5 weeks + of operation when left on continuously, your unit should be very close to being fully broken in. The sound and performance has progressively improved and your unit will perform to it's full sonic potential.