The Ultimate Desktop Audio Interface

Apogee Quartet is the ultimate desktop audio interface and studio control center for professional recording. Made for the musician, producer and engineer that wants the ultimate sound quality and studio control in a compact desktop form factor, Quartet features legendary Apogee AD/DA conversion, 4 world-class microphone preamps, USB MIDI I/O, ESS Sabre32 DAC technology and monitor controls.

With Quartet’s 4 Combo inputs you can connect microphones, guitars, keyboards or line level devices such as external mic preamps or a mixing board. Expand your system with 8 additional inputs via Quartets optical (ADAT/SMUX) digital IN. Quartet also includes 8 analog outputs – 6 1/4” balanced outputs for connection to speakers or outboard equipment and a separate, independently controlled 1/4” stereo headphone output. You can control up to 3 pairs of speakers or set Quartet up for 5.1 surround monitoring.

Inputs & Outputs

Analog Inputs
Quartet is equipped with 4 combination input connectors (XLR and 1/4”) for connecting microphones, guitars and keyboards or your favorite external mic preamps, compressors and EQs.

Digital Input
Quartet also includes 8 channels of digital input via 2 optical connections (ADAT/SMUX) for connecting an additional analog-to-digital converter such as Apogee’s Ensemble.

Analog Outputs
Quartet’s 6 balanced 1/4” TRS outputs offer an impressive range of possibilities. Listen and compare stereo mixes on up to three sets of speakers.

Word Clock
Quartet provides Word Clock OUT for synching an external A/D converter to Apogee’s superior clocking technology.

MIDI
Quartet provides a single USB MIDI connection for your CoreMIDI compatible keyboard, synth, or DJ controller.

Dual, high-resolution displays show all input and output details

Quartet features twice the display you came to love with Duet. Two high-resolution OLEDs deliver all the visual feedback critical for recording and monitoring. Without looking at your computer, Quartet lets you see metering, levels, grouping and phase, muting, phantom power and Soft Limit for all inputs and outputs.

Quickly select I/O & functions
QuickTouch pads for input and output selection
Quartet makes it easy to access all important recording and monitoring functions. Simply tap a QuickTouch pad on Quartet’s top panel to select an input or output and easily adjust your level with the controller knob. All input and output touchpads feature an LED highlight ring. The highlight ring of the active touchpad is brighter so you can see at a glance which input or output is selected.

The ABCs of Quartet’s assignable features
Three additional configurable touchpads (labeled A, B, C) allow you to quickly access output functions such as “Mute Outputs”, “Dim Outputs”, “Sum to Mono”, “Clear Meters” or “Engage Speaker Set” selection. Each function can be assigned to a touchpad using a drop-down menu within Apogee’s Maestro application.

Monitor control
The A, B, C selectors above the controller knob can be configured in Apogee’s Maestro software to switch between up to 3 pairs of speakers allowing you to use Quartet just like a standard monitor controller. Simply connect 1, 2 or 3 pairs of studio monitors and tap to select which pair you would like to listen to.

Dial it all in
Quickly adjust input gain and output level with Quartet’s control knob
Apogee’s Duet started an audio interface revolution with its single controller knob design. Quartet continues this tradition. A single machined aluminum knob completes Quartet’s control center. With a tap to the touchpad you can select the desired input or output and precisely dial in your level.

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)
System Requirements
Mac OS	Computer: Intel Mac 1.5GHz or faster Memory: 2 GB RAM minimum, 4 GB recommended OS: 10.6.8, 10.7.5 or greater Connection and power: Any available USB port on a Mac Power: DC Power supply included
Windows	OS: Windows 10 Enterprise, Pro or Home Editions (64-bit) – Anniversary Update or greater Driver: Apogee Maestro & Apogee USB ASIO driver Computer: Windows PC with Intel Core i3 processor or greater Memory: 4 GB RAM minimum, 8 GB Recommended Connection: USB port on computer Power: External power supply (included)
iOS	iOS version: 6 or greater Connection: Lightning connector DC Power supply included
iOS device compatibility	iPhone 7 Plus, iPhone 7, iPhone SE, iPhone 6s Plus, iPhone 6s, iPhone 6 Plus, iPhone 6, iPhone 5s, iPhone 5c, iPhone 5, iPad Pro (9.7-inch), iPad Pro (12.9-inch), iPad Air 2, iPad Air, iPad (4th generation), iPad mini 4, iPad mini 3, iPad mini 2, iPad mini, iPad (4th generation), iPod touch (6th generation), iPad touch (5th generation)