Technician to review my Marantz Monos


Can anyone recommend a Technician to review my Marantz Mono MA9S2 mono amps electronics? Someone mature enough to recommend upgrades along the way? In the USA.

 Thanks 
johnread57

Showing 1 response by audioesq

Recommend you contact Jennifer at Jena Labs. She has performed very effective modifications of Marantz MA9SA2 Mono Amps.
Best of luck in your quest.