Burl B4 Mic Pre Daughter Card

True MIC/LINE Gain for the Mothership

Most Mothership ADC cards are designed for line-level signals. The B4 changes that: its new BX6 input transformer is purpose-built for true microphone input impedance, so you can plug mics directly into a B80 or B16 chassis and get a no-compromise, class-A mic preamp stage ahead of the same ADC used in the BAD8.

A single B80 loaded entirely with B4 cards yields 40 channels of audiophile MIC/LINE inputs - ideal as a studio-grade Dante or SoundGrid stage box, or simply as the input stage for a large-format Mothership tracking rig.

B4 Mic Pre Features & Specs

• 4-channel MIC/LINE ADC
• 4-channel XLR connectivity
• All class-A, NextGen Analog BOPA14 op-amps
• New BX6 input transformer for true MIC/LINE impedance
• 40 total MIC/LINE input channels per B80
• Avid delay matching
• ADC filter select
• Fully balanced signal path for extremely low noise floor
• Frequency response, LINE 0dB gain: -0.03dB @ 10Hz, -1.5dB @ 30kHz
• Frequency response, full 59dB gain: -0.03dB @ 10Hz, -2.5dB @ 30kHz
• Input impedance: LINE 10k Ohms, MIC 2.5k Ohms

DOCUMENTATION:

• B4 Mic Pre Quick Start Guide (Rev C)