Callia

Front Panel 

• Input selection LEDs
  • Indicate auto/manual select mode and current input: optical S/PDIF, RCA S/PDIF or USB.
• Sample rate/format LEDs
  • Indicate sample rate: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz, (for fs>192k see note at foot of page), DSD64 or DSD128
  • also indicates PCM word-length ‘> 16 bits’ (24b LED ON blue) or ‘> 24 bits’ (24b LED ON pink).
• Line volume control
  • Controls the volume at the analog line outputs when enabled. (See ‘REAR PANEL -> DIP switches’) Halo setting indication.
• Headphone output
  • 6.3mm stereo jack socket, with illuminated volume control
• Standby/source button
  • Switches between operation and standby modes; also used for manual input selection (momentary press) and LED brigtness.
• LED brightness
  • Hold Standby/source button down and twist Volume knob to adjust.

Rear Panel 

• Analog line outputs
  • Two XLR male for balanced connection; two RCA sockets for unbalanced connection
• S/PDIF inputs
  • RCA coaxial and TOSLINK optical formats
• DIP switches
  • Enable/disable line volume control, DSD headroom select, headphone impedance setting
• USB port
  • USB 2.0 B type device socket
• Mains power
  • 3-pin 6A IEC inlet

Software Support 

• Mac OS Support
  • OS X 10.5 or later on Intel and Apple M1 silicon
• Windows OS Support
  • Windows Vista, 7, 8.x, 10 or later, 32 or 64 bit
• Mac OS X audio driver
  • Callia is a Core Audio compliant device
• Windows audio driver
  • ASIO and WDM

Analogue Line Outputs

• Configuration
  • Fully-balanced analog signal path to electronically-balanced XLRs,
    RCAs pseudo-balanced
• Output amplitude
  • XLR: 0dBFS=14dBu; RCA: 0dBFS=2Vrms
• Output impedance
  • 50Ω (both balanced and unbalanced outputs)
• Unbalanced mode
  • Automatic, with bootstrapping level compensation
• Total harmonic distortion
  • -107dB (0.00045%, -0.1dBFS)
• THD+N
  • -106dB (0.00050%, -0.1dBFS)
• Dynamic range
  • 115dB (-60dBFS)
• Gain accuracy
  • ±0.05dB
• LF roll-off
  • -0.05dB at 8Hz, -3dB at <1Hz
• HF roll-off
  • fs = 44.1kHz: -0.05dB at 21.4kHz; -3dB at 22.0kHz
  • fs = 48kHz: -0.05dB at 23.2kHz; -3dB at 23.9kHz
  • fs = 96kHz: -0.05dB at 32.0kHz; -3dB at 47.8kHz
  • fs >= 192kHz, incl. DSD64/128: -0.05dB at 32.0kHz; -3dB at 76kHz

Performance Plot 

Headphone Output

• Output amplitude
  • 0dBFS=18.0dBu (HiZ), 14.45dBu (MedZ), 8.45dBu (LoZ)
  • measured at top (maximum setting) of potentiometer
• Output impedance
  • 4R
• Total harmonic distortion
  • -104dB (0.00045%, -0.1dBFS)
• THD+n
  • -103dB (0.00050%, -0.1dBFS)
• Dynamic range
  • 113dB (-60dBFS)
• Gain accuracy
  • ±0.05dB at top of potentiometer
• LF roll-off
  • -0.05dB at 6Hz; -3dB at 1.45Hz
• HF roll-off
  • fs=44.1kHz: -0.05dB at 20.3kHz; -3dB at 22.0kHz
  • fs=48kHz: -0.05dB at 21.1kHz; -3dB at 23.9kHz
  • fs=96kHz: -0.05dB at 27.0kHz, -3dB at 47.8kHz
  • fs=>=192kHz, including DSD64, DSD128:
  • -0.05dB at 27.0kHz, -3dB at 71.0kHz
• Inter-channel cross-talk
  • 1kHz: <-120dB; 20Hz..20kHz: <-105dB
• Inter-channel phase
  • 10Hz..5kHz: ±0.1º, 5kHz..20kHz: ±0.25º, 20kHz..50kHz: ±0.5º

USB 인풋

• Interface protocol
  • USB Audio Device Class 2.0 (UAC2)
• Audio formats supported
  • PCM audio of up to 32 bit word length at sampling rates of 44k1, 48k, 88k2, 96k, 176k4, 192k, 352k8, 384k and DSD64, DSD128 in DoP frame (for fs>192k see note at foot of page).

S/PDIF Inputs

• Interface formats
  • S/PDIF (RCA and TOSLINK); RCA also accepts AES3-ID
• Audio formats
  • PCM audio of up to 24 bit word length at sampling rates of 44k1, 48k, 88k2, 96k, 176k4, 192k and DSD64 in DoP frame
• Channel Status
  • ignored

Synchronization

• Clock recovery technology
  • Prism Sound CleverClox hybrid PLL
• Synchronization sources
  • Local or S/PDIF input (automatic selection)
• Local clock accuracy
  • ±50ppm
• Jitter rejection
  • >60dB / decade above 100Hz