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 535-LA
Boost or attenuate line-level signals with API's signature warm, punchy sound
API 535-LA 500 Series Line Amplifier
API 535-LA Line Amplifier (500 Series Module)
API 535-LA 500 Series Line Amplifier
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API 535-LA Line Amplifier
api 535-LA ディスクリート ラインアンプ (500シリーズ), エフェクター・プロセッサー
API – 535-LA [Amplificatore di Linea – Serie 500]
API 535-LA 500 Series Line Amplifier Module
Larry Droppa and the API 535-LA Line Amplifier at The AES Convention 2015
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New Gear Review: API 535-LA Line Amplifier – Music Connection Magazine
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Larry Droppa and the API 535-LA Line Amplifier at The AES Convention 2015