4 IN x 8 OUT USB Audio Interface and Control Center for iPad and Mac
Apogee Quartet is a professional USB audio interface designed to deliver the ultimate desktop recording experience to the iPad and Mac-based studio. Featuring 4 inputs and 8 outputs of Apogee’s industry-leading AD/DA conversion technology as well as 4 world-class mic preamps, Quartet bridges the gap between the 2-channel Apogee Duet and Apogee’s flagship interface, Symphony I/O. Quartet for iPad and Mac features special circuitry designed to deliver professional performance for iPad use along with low latency USB 2.0 performance for Mac. Quartet’s MIDI I/O connector lets you connect and power a Core MIDI compatible keyboard/controller while using Quartet with your iPad or iOS device.
Legendary Sound Quality - Why Apogee Quartet is the best choice for your studio
Apogee is an award-winning industry leader in digital recording technology with over 25 years of experience. Preferred by recording pros around the world, Apogee products like Duet, Ensemble and Symphony I/O have been instrumental in creating countless GRAMMY® and OSCAR® winning recordings and have set the industry standard in professional recording for over two decades. Quartet is built solidly on this reputation.
Charges iOS device.
Quartet charges the iPhone, iPod Touch, or iPad when connected so your work is not interrupted.
4 analog inputs.
4 analog inputs with world-class mic preamps and selectable 48v phantom power for connecting microphones, instruments or line-level devices.
Works with iOS and Mac.
Direct connection with Lightning iOS devices (iPhone, iPod touch, iPad) and USB connection to Mac.
Maestro app for iOS and Mac.
Software control of hardware parameters including input selection and low latency monitoring.
*Apogee products are built in the U.S.A. using domestic and foreign parts and components.
Sound Quality - The Apogee Advantage
A difference you will hear
From the mic preamps to the AD/DA converters and the clocking, Quartet is best-in-class and cutting-edge Apogee technology. With components carefully selected in critical listening tests and a highly efficient circuit design, Quartet was built by Apogee engineers to make a difference you can hear.
Pristine, next generation AD/DA converters
Quartet’s AD/DA converters are designed to deliver the purest recordings and best listening experience possible. Quartet’s efficient circuitry and state-of-the-art components provide a simplified signal path resulting in incredibly transparent recordings.
Smooth, detailed world-class mic preamps
Much like the AD/DA converters, Quartet’s mic preamps feature the latest components and offer seamless click-free transitions as the gain increases and decreases throughout the incredible range of 0-75dB. This unprecedented feature allows you to dial in the perfect level, either with the controller knob or from within software, while delivering ultra-low noise and smooth, crisp detail. Quartet’s mic pres are suitable for all dynamic, condenser or ribbon microphones, allowing you to capture any sound without compromise.
Soft Limit for protection from digital overs
An Apogee technology first introduced in 1992 on Apogee’s AD-500 converter, Soft Limit can be heard on countless platinum selling records around the world. Once a technology exclusively reserved for Apogee’s most advanced audio converters, Soft Limit is included in Quartet and can be enabled in Apogee Maestro software. This superior analog design prevents the digital clipping that causes distortion by instantaneously rounding off transient peaks before they hit the analog-to-digital converter. Soft Limit allows several more decibels of apparent level to be recorded while subtly providing an analog-like warmth to the sound.
ESS Sabre32 DAC Technology
ESS Sabre32 32-bit Hyperstream DAC with Time Domain Jitter Eliminator offers unequalled dynamic range, ultra low distortion, and unmatched audio clarity free from input jitter. While ESS Sabre32 DAC has been widely recognized and employed in the audiophile community as the next step in converter technology, Apogee is one of the first pro audio manufacturers to employ this DAC in an interface designed for audio and video professionals. ESS Sabre32 DAC technology, as employed in Duet 2, Duet for iPad & Mac, Quartet and Symphony I/O, is one ingredient in the Apogee Engineering Difference. The benefits of the ESS Sabre32 DAC include:
32-bit DAC Architecture – Compared to older 24-bit technology, the Sabre32 DAC’s 32-bit filter processing results in significantly lower noise and distortion, for a pure listening experience free from artifacts. 32-bit digital attenuation ensures that sonic purity is maintained at any listening level.
Time Domain Jitter Elimination removes clock inconsistencies from the incoming digital data, so the converted analog output preserves the clarity and soundstage detail of the original recording.
The ESS Sabre32 DAC offers revolutionary solutions to the design challenges inherent with a digital-to-analog converter.
Clocking the DAC
The clock that drives a DAC has rather contradictory requirements – it must lock to the incoming jittery digital data in order recover each bit correctly, but it can’t pass this jitter onto the D-to-A stage, where jitter will degrade the analog audio output. ESS overcomes this dilemma with their Time Domain Jitter Eliminator process, which consists of 1) an internal, lowjitter reference clock to drive the D-to-A stage 2) the Asynchronous Sample Rate Converter that analyses the incoming data clock and algorithmically corrects the data bitstream for perfect transmission to the D-to-A without a traditional phase lock loop.
Delta-Sigma Modulation Noise
Other delta sigma converters suffer from noise artifacts that are inherent to oversampled, noise shaping designs; ESS’s HyperStream modulator includes innovations to removes these artifacts.
All delta sigma converters include a digital interpolation filter, to convert the incoming PCM data (i.e. 96kHz, 24-bit) to a delta sigma bitstream. Unlike older 24-bit DACs, the ESS performs these DSP operations at a resolution of 32 bits for lower noise and distortion.
32-bit Monitor Attenuation
The ESS DAC provides 32-bit digital attenuation for monitor volume control when connecting directly to powered speakers. When compared to alternate attenuation designs, 32-bit digital attenuation provides the best performance and flexibility. In the past, digital attenuation (at 24-bit resolution) was not considered the best way to provide monitor level control – lowering the output level results in a loss of resolution. Digitally-controlled analog attenuation, as employed in previous Apogee designs, was the revolutionary solution that offered the flexibility of software control while maintaining resolution and perfect stereo/5.1 channel tracking. While developing Symphony I/O’s standard-setting DAC stage, it became evident that the components used to provide digitally-controlled analog attenuation were limiting the DAC’s performance, so another design had to be found. The 32-bit digital attenuation offered by the ESS Sabre32 DAC is the perfect solution – digital resolution is maintained far beyond the circuit noise floor while noise and distortion performance remains un-compromised.
Apogee Quartet Product Tour - All the I/O You Need
Inputs & Outputs
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.
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.
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.
Quartet provides Word Clock OUT for synching an external A/D converter to Apogee’s superior clocking technology.
Quartet provides a single USB MIDI connection for your CoreMIDI compatible keyboard, synth, or DJ controller.
Expand Your Studio I/O
Digital Inputs with Apogee Ensemble
12 in x 8 out
For Ensemble users that need more inputs, Quartet’s digital input connection allows you to use the premium analog inputs and preamps of both devices simultaneously. Enjoy a combined total of 12 analog inputs (8 with mic pres) along with Quartet’s 8 analog outputs, assignable Touchpads, and advanced control capabilities. Quartet’s USB connection lets you continue enjoying Ensemble’s high-quality Mic Pres and AD conversion with the latest Mac Models and lower latency than ever possible with Firewire 400.
6 in x 12 out with mic preamps
Duet users can add more channels of high-quality Apogee conversion to their existing setups by adding Quartet. Connect both Quartet and Duet to your Mac’s USB ports and aggregate the two devices for a combined total of 6 analog inputs and 12 analog outputs of premium Apogee AD/DA conversion.
Control - See it. Select it. Dial it in.
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.
Speaker set selection
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 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.
Solid build quality
Built with die-cast aluminum, steel and a scratch-resistant display panel hardened by UV processing, Quartet is solid, compact and perfectly integrated into the desktop studio environment.
Music Creation on iPad
A revolution in personal & professional recording
Apple’s iPad is an incredible audio recording and music creation tool. It is by far the most accessible, reliable and dynamic way to make music.
iPad puts you in touch with your creativity
Interacting with iPad to make music is like playing an instrument. In fact, some apps like Apple’s GarageBand turn your iPad into a guitar or virtual instrument. Whether you are moving faders on a mixer, adjusting software parameters, or editing a waveform, iPad’s multi-touch interface is a more hands on environment and superior to mouse clicks or track pad swipes.
Setting up your studio has never been easier
iPad makes everything easier with a simplified user interface and plug and play connectivity for accessories like Apogee audio interfaces. You’ll be amazed by how simple it is to set up your studio.
There's a music app for everything
There are hundreds of music apps for iOS and iPad. With multi-track recording DAWs like GarageBand and Auria, synths and drum machines like Animoog and DM1, utilities and guitar effects like Audiobus and JamUp Pro, the music creation offering for iPad is vast and varied. And most apps are more affordable than their Mac based counterparts.
Share you music
Sharing functionality is built-in to most apps, making it easier then ever to move files and collaborate on different devices including iPad to Mac
Pro I/O Meets iOS
Apogee. The first to make professional recording on iPad a reality.
Apogee pioneered studio-quality recording on iPad with JAM, the first digital guitar input and MiC the first professional digital microphone for iPad. JAM was featured in Apple’s iPad 2, GarageBand launch video. Now with ONE, Duet and Quartet, Apogee is the first to introduce professional multi-track recording interfaces to the world of iPad and iOS. These products complete this amazing platform by offering musicians, producers and engineers professional tools for music recording, production and listening.
Superior sound quality
For almost 30 years, Apogee has been setting the standard in digital audio recording technology with award-winning products.
Maestro control software for iOS
Apogee ONE, Duet and Quartet are the first audio interfaces to feature software control made for iPad and iOS devices. Apogee’s Maestro lets you access all hardware parameters and monitor with a low latency mixer.
Direct digital connection to iPad
Apogee ONE, Duet and Quartet for iPad and Mac feature special circuitry that makes a direct digital connection to iPad and iOS devices and is certified by Apple’s MFi (Made for iOS) program.
DC power charges iPad
In audio, adequate power is essential for excellent sound quality. With a direct digital connection and an external power source, ONE, Duet and Quartet are able to charge your iPad while you record so your work will not be interrupted.