Auckland  09 414 0477
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Apogee Symphony I/O 2x6 Configuration (SIOC-A2X6)

Apogee Symphony I/O 2x6 Configuration (SIOC-A2X6)
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WAS NZ $3,556.00 NZ $2,490.00 Save NZ $1,066.00 Excl GST

The best sounding Apogee converters and mic pre-amps ever

  • The culmination of 25 years of Apogee's design excellence and experience
  • Next generation converter quality
  • Refined and updated circuitry with fewer, more advanced components:
    • Fewer components means a shorter audio path and more recording clarity and transparency
    • Lower converter latency
    • More efficient power distribution
    • Big Ben built-in with enhanced C777 clocking performance
  • Optional mic preamp module
    • 8 Mic Preamps
    • 4 Hi-Z instrument inputs
    • 8 digitally assignable inserts
    • 85 dB of gain
    • Selectable 48v phantom power, Soft Limit and phase invert
  • Front panel control of headphone and output levels, and mic preamp gain (mic preamps optional)

Symphony I/O, the highest end

Symphony I/O builds upon the award-winning design approaches of Apogee’s X-Series* and Rosetta Series converters*, the Big Ben master clock and the Trak2 mic preamps. It also refines and updates these proven designs with fewer but more advanced components while optimizing their performance with efficient power distribution. These enhancements allow audio to travel through less circuitry, offering lower converter latency, more accurate clocking and even more transparency and clarity in your recordings.

Analog design, the cornerstone of Apogee quality

Apogee's engineers do not merely rely on specs and data sheets when selecting converter components, they listen. Each component is auditioned and carefully selected to best reflect the characteristics of the Apogee sound. Symphony I/O’s audio path design is elegant and efficient, incorporating the most advanced opamps that offer better performance than multiple parts used in previous designs. This design improvement minimizes the audio path circuitry and maximizes sound quality. And in the tradition of the X-Series and Rosetta series, the entire audio path is DC coupled, resulting in ultra flat frequency response and extremely low phase error.

8 mic preamp module

The 8-Channel Mic Preamp Module turns Symphony I/O into an all-in-one interface that lets you make incredible recordings anywhere. With 8 world-class microphone preamps and 8 channels of premium AD/DA conversion you have the most portable, professional recording rig ever.

Front Panel

Elegant and easy to use, the front panel of Symphony I/O is streamlined to present the visual
feedback you need to monitor levels, sample rate and clock status while providing the controls
required to adjust gain, output levels and select the Audio Interface Mode (AIM).

  • Dual multi-function encoder knobs
  • GUI display for adjustment of function parameters and selection of Audio Interface Mode
  • Assignable 10 segment peak/over metering
  • 2 high-quality independent 1/4” headphone outputs

Rear Panel

The rear panel tells the story of Symphony I/O’s adaptable design architecture with two I/O Module
slots capable of up to 32 channels of system input and output and PCI, USB and Ethernet connectivity for
complete compatibility with popular workstations. The base unit also features essential word clock
connectors and termination, and a quiet, digitally-controlled fan to keep it all running cool.


  • 2 I/O Module slots capable of up to 32 channels of I/O
  • PCI, USB and Ethernet connectivity
  • High-performance, temperature controlled fan

Total Flexibility: Symphony I/O is built to grow with your studio

Symphony I/O is an audio hardware platform, designed to deliver the most advanced recording technology available and the flexibility, scalability, and longevity required to power the modern studio. Modular I/O design, total software control, and direct connection to all popular DAWs make Symphony I/O a long-term sound investment.

What makes Symphony I/O a great choice for your studio now and for years to come:

  • Flexible design architecture with a base unit and two I/O module slots
  • Up to 32 channels of I/O per unit
  • Future proof connectivity with PCI, USB and Thunderbolt development
  • Compatibility with Logic, Pro Tools HD, and any Core Audio based application on a Mac
  • Total software control of Symphony I/O with Maestro

The All New Maestro

Apogee’s software control application, Maestro, has been totally redesigned for Symphony I/O. Featuring a familiar single window, multiple tab interface for quick access to all device and system settings, the new Maestro makes routing, mic preamp adjustment, input and output calibration and low latency monitoring clear and easy to use. To reduce screen clutter, Maestro also features a minimized tool bar view with System Status display, volume controls and buttons to mute outputs and clear meters.


  • Speaker, headphone, and mic preamp level control

  • Clock source, sample rate setting

  • Audio Interface Mode (AIM)

  • Minimized tool bar view with System Status, volume controls, mute and clear meters buttons

  • Software controlled A/D & D/A calibration

  • Comprehensive metering

  • Intuitive audio routing

  • 4 Soft Limit settings: -2 dBfs, -4 dBfs, Soft Saturate and Soft Crush


  • A/D THD+N: -113dB @ +20dBu (0.00024%) unweighted
  • D/A THD+N: -117dB @ +20dBu (0.00014%) unweighted
  • D/A Dynamic Range: 129dB A weighted
  • Apogee’s proprietary Perfect Symmetry Circuitry (PSC)
  • Software controlled AD/DA reference setting
  • Variable gain input for keyboards
  • Ultra low latency AD/DA conversion


Analog to Digital:

  • THD+N: -113dB @ 20dBu (0.00024%)
  • Dynamic range: 120dB A weighted
  • Maximum input levels:
    • +4dB setting - 24dBu

    • -10dB setting - +6dBV

  • Variable gain setting - 25dB of gain
  • Frequency response at 44.1kHz 1-20,000 Hz (+/- 0.05dB)
  • Input impedance: 10K

Digital to Analog:

  • THD+N: -117dB @ 20dBu (0.00014%)
  • Dynamic Range: 129dB A weighted
  • Max output levels - ∞ to +24dBu
  • Frequency response at 44.1 kHz: dc to 20kHz (+/- 0.05dB)
  • Output impedance: 25 Ohm
  • Outputs are balanced through Apogee's proprietary Perfect Symmetry Circuitry (PSC)


  • THD+N: -105dB @19dBu
  • Dynamic Range: 119db A weighted
  • Output impedance: 30 Ohm


  • 90-240VAC, 50-60Hz, 150W

Operating System:

  • Mac OS only 10.5.8 and above


Package Contents:

  • Symphony I/O Interface
  • USB Cable
  • Power Cable
  • Rack Ears and Bolts
  • Quick Start Guide


Symphony I/O Dimensions:

  • Inches: 17.75" (19" with Rack Ears) x 11.5" x 3.5" (4" with feet installed)
  • Centimeters: 45 (48.26 with Rack Ears) x 29.2 x 8.9 (10.2 with feet installed)



Analog Inputs

  • 2 balanced inputs on 2 female XLR connectors
  • Connect microphones via external mic preamps
  • Connect guitars via DI boxes or external mic preamps
  • Connect keyboards directly to Symphony I/O

Digital Inputs

  • 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


Analog Outputs

  • 6 balanced outputs on 1 DSUB 25-pin connector

Digital Outputs

  • 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

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Auckland: 09 414 0477
Wellington: 04 801 9494

Australia: 1300 472 344