16 Matrix SETU ATA211 V1 System Manual
• If the product does not operate normally by following the operating instructions. Adjust only those controls
which are covered by the operating instructions because improper adjustment of other controls may result
in damage and will often require extensive work by a qualified technician to restore the product to normal
operation.
• If the product has been dropped or the cabinet has been damaged.
• If the product exhibits a distinct change in the performance.