Quartet Specifications

Features:

• USB 2.0 High-speed Mac audio interface
• A/D and D/A conversion: 24 bit/192kHz
• 4 Analog Inputs:
  • Combination line (balanced +20dBu max)
  • Mic/Instrument (+20dBu/+14dBu max)
  • 4 Microphone preamps with up to 75dB of gain
  • Selectable 48v phantom power, Soft Limit and phase invert
• Digital Inputs:
  • ADAT/SMUX Input, 8 channels, 2 Toslink connectors, 44.1kHz to 96kHz
  • MIDI input (USB-A type connector)
• 8 Analog Outputs:
  • 6 Balanced line outputs, +20 dBu maximum output level
  • 1 Independent 1/4” stereo headphone output
• Digital Outputs:
  • MIDI output (USB-A type connector)
  • Word clock output on BNC connector
• 2 top panel high-resolution OLED displays
• Controller knob
• 6 touchpads for direct selection of inputs and outputs
• 3 assignable touchpads to control:
  • Mute Outputs
  • Dim Outputs
  • Sum to Mono
  • Clear Meters
  • Engage Speaker Set (allows monitoring of up to 3 pairs of speakers)
• Low latency monitoring, complete input/output control with Apogee’s Maestro software
• Legendary Apogee sound quality
• Designed in California – Made in the U.S.A.

Mic Pre:

• EIN: 128dB (un-weighted) @ 60dB, 150Ohm input
• Max input level: +20dBu
• Input impedance: 3KOhm

Hi-Z:

• Max input level 14 dBu
• Input impedance: >2MOhm

A/D conversion:

• Max input level (+4dBu ref): +20dBu
• Max input level (-10dBV ref): +6dBV
• Input impedance: 5KOhm
• Freq resp 20 Hz -20Khz: > +/-0.2dB (@44.1Khz)
• Rel. THD + N: -106dB (@ 96Khz)
• Dyn. Range: 114dB (A-weighted)

D/A conversion:

• Max output level (+4dBu ref): +20dBu
• Max output level (-10dBV ref): +6dBV
• Line output impedance: 90 Ohm
• Max output level headphones: 19dBu
• HPH output impedance 30 Ohm.
• Freq resp 20Hz -20 Khz: > +/- 0.05dB (@44.1Khz)
• Rel. THD+N : -113dB (@96Khz)
• Dyn Range: 123dB (A-weighted)