Purple Audio Biz MK

The Purple Audio Biz MK is a unique, discrete 500-series microphone preamp module designed to work in standard 500-series racks. It features a three amplifier design with separate input gain and output level controls, allowing for precise dialing in of the desired sound. The Biz MK includes a "Dual" mode that splits the gain between two Class A, discrete opamps, enabling up to 75 dBu of clean gain, which makes it particularly suitable for ribbon microphones.

Key features of the Purple Audio Biz MK include:

• Maximum output level of +27 dBu

• Smooth gain control with a separate level control for output adjustment

• A front panel DI input with a load switch offering two impedance options for different tonal characteristics

• Tricolor LED metering for input and output levels (green for signal, yellow for 10dB below clipping, red for clipping)

• Uses two KDJ3 and one KDJ4 Class A opamps

• Frequency response from 10 Hz to 70 kHz (+/- 1 dB)

• Over current resettable fused protection to prevent rack issues

• Designed for versatility across mic, line, and DI signals with various gain settings in single and dual modes

The Biz MK is praised for its ability to produce a wide range of tones from clean to "dirtier" amplifier-like sounds, making it flexible for different recording applications. It is also known for its powerful clean gain, tonal variety, and clarity, especially favored for ribbon mics and instrument inputs.

Overall, the Purple Audio Biz MK is recognized as a high-quality, versatile mic preamp module ideal for professional audio setups requiring rich tonal options and robust performance in a 500-series form factor.