Although we have serviced Carver for the past 34+ years, As of April 2006 it is our privilege to have been hand picked by SUNFIRE Corporation to provide authorized Carver service for the entire line of Carver products. This is due to our reputation of providing the absolute best service available, we just will not cut corners, and have proved to be the most reliable choice for servicing this vintage product, we also purchased at that time the entire OEM parts inventory to ensure absolute peak performance of all your Carver products. Phase Linear: Like the Carver products we have been servicing Phase Linear products for 34 plus years and counting. Please see the pricing page, we have several updates and modifications that will improve the audio performance of these fine products.