The 535-LA is a 500 series module based on API's 325 booster console cards. It can be used to amplify or attenuate incoming and outgoing signals while
API LA-535 500 Series Line Amplifier Pair Consecutive Serial Numbers
Larry Droppa and the API 535-LA Line Amplifier at The AES Convention 2015
API: 535-LA Line Amplifier
500 Series Unique Modules
API 535-LA Line Amplifier im 500er-Format
API 535-LA 500 Series Line Amplifier
API Audio 535-LA Line Amplifier
Larry Droppa and the API 535-LA Line Amplifier at The AES Convention 2015
New Gear Review: API 535-LA Line Amplifier – Music Connection Magazine
API: 312 Mic Preamp
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