Modeled after API's highly award-winning console-based 325 booster cards, the 535 can amplify and attenuate input and output signals for maximum flexibility—while still providing API's trademark warmth and tone.

The 535 excels at adding warmth to a variety of signals. Recommended uses include:

• Heat digital signals of all types;
• Add tone to keyboard equipment;
• Add heat to any mixture.

Audio playback devices, microphone preamps, or audio processing devices that do not have their own level control will also benefit from the 535-LA's additional tone and control.

The 535-LA also includes a balanced input, a polarity switch, a 20dB pad for attenuating the input signal, and a three-position selector switch that allows different levels of transformer output gain. This is designed to drive long balanced lines with low distortion, just like the 325 boost card does. The output gain range is 6dB to 45dB. The 535 utilizes discrete 2510 and 2520 Op-Amps along with API's proprietary transformers to create the unique, warm, reliable sound that API users have come to expect. Like all API products, the 535-LA features API's exclusive 5-year warranty.

Characteristics

• Continuously variable held entry level trim;
• Polarity button;
• 20dB input block;
• Calibrated level mode;
• Output rate selector;
• LED clip indicator;
• Continuously variable output gain;
• Traditional API fully discrete circuit design;
• The audio circuit uses the famous 2510 and 2520 operational amplifiers;
• Traditional API fully discrete circuit design.