Unison Research Unico Amplifier Repair 
The Unison Research amplifier was leaking DC into the speaker, causing damage to the speaker.
This has been one of the most difficult repair jobs we have encountered.
This is the 3rd Unico of the same model belonging to differrent people entering
our repair lab.
Due to
awkward industrial engineering layout, the majority of the components are not
accessible unless if we disassemble the entire amplifier, which means it has to
be reassembled and dissembled again, over and over for every segment of repair
and testing. The amplifier requires the replacement of the biasing circuit board together with changing certain damaged components such as transistors and resistors. The repair was done in collaboration with Unison Research who was kind enough to provide schematics and parts for the repair.
Unfortunately, minor hidden problems took us a painstakingly long period of time
to diagnose. The repair process was documented on audiophile
forums. Luckily, we were able to get the job done so our reputation was
preserved, and was feedback was to the positive.
Turnaround time: 6 weeks. 
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