Federal AM-447/G Vari-Mu Compressor Limiter 1950s - Black | Reverb
FEDERAL AM-864 TUBE COMPRESSOR LIMITER COMPLETE ORIGINAL EXCEPTIONAL UNIT | #1847659112
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1955 Federal Television Corporation FTC AM-864/U Signal Corps Tube Amplifier Vari-Mu Compressor Limiter Studio Amp Indigo Ranch Studios Collection Serviced & Studio Ready #1 | Reverb Italia