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API Audio 535-LA Line Amplifier 500 Series
API Audio 535-LA Front
API Audio 535-LA Internals
API Audio 535-LA Internals

API 535 LA

Regular price $565

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API 535-LA Line Amplifier
Modeled after API's highly prized console-based 325 booster cards, the 535 can both amplify and attenuate incoming and outgoing signals for ultimate flexibility—all while providing API's trademark warmth and tone.

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The 535 excels at adding warmth to a variety of signals. Recommended uses include:
    •    Warm up digital signals of all kinds
    •    Add Tone to Keyboard rigs
    •    Add warmth to any mix

    •    Continuously variable detented input level trim
    •    Polarity button
    •    20dB Input Pad
    •    Calibrated Level mode
    •    Output Ratio selector
    •    Clip LED indicator
    •    Continuously variable Output Gain
    •    Traditional API fully discrete circuit design
    •    Audio circuit uses the famous 2510 and 2520 Op-Amps
    •    Traditional API fully discrete circuit design
Frequency Response:    -0, +0.2, 30Hz-20kHz
THD+N:    .006% at factory CAL Level setting (+4dBu)
Noise floor:    -85dBu at factory CAL Level setting
Gain Range:    -inf. to 53dB
Maximum Input level:    +32 dBu, balanced (with PAD)
Maximum Output level:    +32 dBu MAX, balanced (1kHz)
Input Impedance:    Greater than 20,000 ohms, ~4,000 ohms w/ pad
Output Impedance:    Less than 75 ohms

API 535 User Guide
API Audio 535-LA Internals