# Specifications

## Highlights:

- A/D THD+N: -113dB @ +20dBu (0.00024%)

- D/A THD+N: -117dB @ +20dBu (0.00014%)

- 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)

##
Headphones:

- THD+N: -105dB @19dBu

- Dynamic Range: 119db A weighted

- Output impedance: 30 Ohm

##
Power:

- 90-240VAC, 50-60Hz, 150W

##
Operating System:

- Mac OS 10.6.4 or greater, including OS X 10.7 Lion

## Package Contents:

- Symphony I/O Interface

- USB Cable

- Power Cable

- Rack Ears and Screws

- Quick Start Guide

## Packaging Sizes:

Symphony I/O Chassis Box

Inches: 22.875 L x 17.75 W x 9.25 D
Centimeters: 58.1 L x 45.1 W x 23.5 D

I/O Module Box

Inches: 13.75 L x 12.25 W x 3.25 D
Centimeters: 34.9 L x 31.1 W x 8.3 D

##