
Symphony I/O Mk II | Thunderbolt
Multi-channel Audio Interface for macOS Thunderbolt Systems
Thunderbolt Configurations
2×6 SE
$4,475
Thunderbolt
8×8+8MP
$5,425
Thunderbolt
16×16 SE
$5,995
Thunderbolt
32×32 SE
$8,865
Thunderbolt
Ready for Immersive Audio
Monitor Workflows Featuring Dolby Atmos and Sony 360
True Thunderbolt Performance
Lowest Latency. Superior Sound Quality.
Symphony I/O Mk II Thunderbolt delivers the full potential of Thunderbolt 2 performance with the lowest latency, unmatched CPU efficiency and 2 ports for connecting additional peripherals.
Symphony I/O Mk II Thunderbolt relies on Apogee’s proprietary Thunderbolt driver, written from the ground up to offer unmatched performance and efficiency. When using Logic Pro X, latency has been reduced to an astounding 1.35 ms round-trip*, allowing you to monitor through your DAW, plug-ins included, simplifying your workflow and leveraging the power of your Mac. Even when your session’s DSP demands require a higher buffer setting, Symphony I/O’s ultra-low latency means no longer having to choose between power and speed.
To accommodate different workflow preferences, Symphony I/O Mk II Thunderbolt features optional direct hardware monitoring through Symphony Control Software with 0.6ms of latency.
* Logic Pro X at 96kHz / 32 buffer setting
Devours Bits. Sips CPU.
Symphony Control Software
With Monitor Workflows Featuring Dolby Atmos and Sony 360
Everything is under Control
Symphony Control software for macOS gives you comprehensive access to all features and functions of Symphony I/O Mk II Thunderbolt. Set gain levels (preamp modules only), manage routing, control output levels, set calibration, set-up multiple mixers and more.
And with Symphony I/O Mk II Thunderbolt’s new Monitor Workflows, you can effortlessly configure and operate your monitoring system for Dolby Atmos, Sony 360 Reality Audio and other immersive audio systems with control of up to 32 Speaker outputs.
Symphony Control also features compatibility with the new Apogee Control hardware remote.
Highlights
- Streamlined new interface
- Easily adapt layout to fit your workflow
- Essentials control strip maximizes screen space
- FX send lets you use your DAW’s effects with low latency monitoring
- Use your Mac’s Built-in mic for new Talkback feature
- Output source button lets you toggle between mixes
- Create up to 16 “Monitor Workflows” in all popular multichannel configurations: Stereo to ATMOS 9.1.6.
- Instantly switch between Monitor Workflows from the Apogee Hardware Remote, Symphony Control software or the front panel touchscreen
- Mute,Solo and calibrate up to 16 speaker outputs

Symphony Control I/O view

Symphony Control Mix view
Symphony Control on your Desktop
Configuration Information
2×6 SE
Thunderbolt
$4,475
Inputs
- Analog IN: 2 balanced inputs on 2 female XLR connectors
- AES IN: Stereo input on 1 female XLR connector
- Optical IN: Supports ADAT, SMUX & S/PDIF
- ADAT: 8 channels 44.1-48 kHz on 1 Toslink connector
- SMUX: 4 channels 88.2-96 kHz on 1 Toslink connector
- S/PDIF: 2 channels, up to 96 kHz on 1 Toslink connector
- S/PDIF Coax IN: 2 channels, up to 192 kHz on 1 RCA connector
A/D
- THD+N of -116dB @23dBu (0.00016%) unweighted
- Dynamic range: 124 dB (A) of dynamic range
- Maximum input levels:
- +4dB setting: +24dBu
- -10dB setting: +6dBV
- Frequency response at 44.1kHz: 1-20,000 Hz (+/- 0.05dB)
- Input impedance: 10K
Outputs
- Analog OUT: 6 balanced outputs on 1 DSUB 25-pin connector
- AES OUT: Stereo output on 1 male XLR connector
- Optical OUT: Supports ADAT, SMUX & S/PDIF
- ADAT: 8 channels 44.1-48 kHz on 1 Toslink connector
- SMUX: 4 channels 88.2-96 kHz on 1 Toslink connector
- S/PDIF: 2 channels, up to 96 kHz on 1 Toslink connector
- S/PDIF Coax OUT: 2 channels, up to 192 kHz on 1 RCA connector
D/A
- THD+N of -118dB @ 22dBu (0.00013%) unweighted
- Dynamic range: 131dB (A) dynamic range
- Max output levels – ∞ to +24dBu
- Frequency response at 44.1 kHz: dc to 20kHz (+/- 0.05dB)
- Output impedance: 25 Ohm
Connection: Thunderbolt
Performance: 44.1kHz – 192kHz
Compatibility: macOS
Control: Apogee Control 2 Software, Front panel touch screen, Apogee Control hardware remote (sold separately)
8×8+8MP
Thunderbolt
$5,425
Inputs
- Analog IN: 8 balanced inputs on 1 DSUB 25-pin connector
- 8 microphone preamps with up to 72dB of gain
- Featuring Advanced Stepped Gain Architecture™
- *AES-EBU IN: 8 inputs on 1 DSUB 25-pin connector
- (192k single wide compatible)
- *Optical IN: Supports ADAT, SMUX & S/PDIF
- ADAT: 8 channels 44.1-48 kHz
- SMUX: 8 channels 88.2-96 kHz
- S/PDIF: 2 channels, up to 96 kHz
- Coax IN: 2 channels of S/PDIF, up to 192 kHz
Outputs
- Analog OUT: 8 balanced outputs on 1 DSUB 25-pin connector
- *AES-EBU OUT: 8 outputs on 1 DSUB 25-pin connector
- (192k single wide compatible)
- *Optical OUT: Supports ADAT, SMUX & S/PDIF
- ADAT: 8 channels 44.1-48 kHz
- SMUX: 8 channels 88.2-96 kHz
- S/PDIF: 2 channels, up to 96 kHz
- Coax OUT: 2 channels of S/PDIF, up to 192 kHz
Connection: Thunderbolt
Performance: 44.1kHz – 192kHz
Compatibility: macOS
Control: Apogee Control 2 Software, Front panel touch screen, Apogee Control hardware remote (sold separately)
16×16 SE
Thunderbolt
$5,995
Inputs
- Analog IN: 16 balanced inputs on 2 DSUB 25-pin connectors
- Coax IN: S/PDIF on 1 RCA connector
Outputs
- Analog OUT: 16 balanced outputs on 2 DSUB 25-pin connectors
- Coax OUT: Supports SPDIF on 1 RCA connector
Connection: Thunderbolt
Performance: 44.1kHz – 192kHz
Compatibility: macOS
Control: Apogee Control 2 Software, Front panel touch screen, Apogee Control hardware remote (sold separately)
32×32 SE
Thunderbolt
$8,865
Inputs
- Analog IN: 32 balanced inputs on 2 DSUB 25-pin connectors
- Coax IN: S/PDIF on 1 RCA connector
Outputs
- Analog OUT: 32 balanced outputs on 2 DSUB 25-pin connectors
- Coax OUT: Supports SPDIF on 1 RCA connector
Connection: Thunderbolt
Performance: 44.1kHz – 192kHz
Compatibility: macOS
Control: Apogee Control 2 Software, Front panel touch screen, Apogee Control hardware remote (sold separately)