Had my Pioneer SA-8500 II refurbished with Carver Audio's "Chassis Refresh" service in February 2025. Besides a thorough cleaning inside and out, all capacitors are replaced. (Go to Carver Audio Repair's website for a better description of all that is included with this service.) Only a few rare days do I not listen to the Pioneer, which performs better than it ever has. It also looks as good as possible for a 50-year-old component. The same condition exists under the hood... it is absolutely beautiful. If an audio component is worth investing in, this service will restore or upgrade to as close to new as is reasonably possible . Rolland (owner) will do custom modifications upon request (for an additional cost). (I requested the Pioneer have an IEC power connection installed.) Carver Audio will also do repairs only. (A Kenwood KA-9100 will be receiving the "Chassis Refresh" within the next few months.) My experience has been that Carver Audio's the level of technical service, pride in their work and overall professionalism is hard to find in servicing home electronics. The reviews tell the story. read more

Had a second integrated amplifier (Kenwood KA-9100) given the "Chassis Refresh" refurbishment service. I have a few audio units from decades ago in decent enough shape to have completely brought back to like-new condition. This service does not address external cosmetics, but the owner (Rolland) will make sure the unit receives a deep cleaning inside and out is remarkable. All capacitors are replaced with modern (better than when new) electrolytic capacitors . (See website for description of "Chassis Refresh" service.) The Pioneer SA-8500 II and Kenwood KA-9100 sound better than I ever remember. If you have cherished older stereo power equipment that you love to use (touch, look at, and listen to) it will be very satisfying to receive back the amp you have sent to Hi-Tech/Carver Audio. read more

To those seeking audio repair for phase linear carver or sunfire you would be hard pressed to find a better repair service than HI -TECH AUDIO REPAIR (503) 618-7605 Roland Barr he refreshed my phase linear amp and repaired my equalizer both are better than new and look forward to a continued relationship for my Audio needs thank you Roland Barr read more

The best.He redid and made fresh two of my Phase Linear 700B amps.And the drive is great. The most beautiful part of the Gorge in wash/oregon.This guy and his Daughter will make you 60's-70's stuff sound 200% better. read more