OctoPre MkII Dynamic

Specifications

We always quote 'real world' performance figures (measured to the AES17 standard). Some companies choose to quote chipset performance, which is misleading, and here's why.

Mic Input

  • Frequency Response: 20Hz - 20kHz +/- 0.1 dB
  • THD+N: 0.001% (measured at 1kHz with a 20Hz/22kHz bandpass filter)
  • Noise: EIN > 125dB (128dB analogue to digital): measured at ~60dB of gain with 150 Ohm termination (20Hz/22kHz bandpass filter)
  • Mic Gain: +10dB to + 55dB
  • Phantom power switched in 4 channel groups on Mic. 1-4 and 5-8
  • Maximum input level +16dBu

Line Input

  • Frequency Response: 20Hz - 20kHz +/- 0.1dB
  • THD+N: <0.001% (measured with 0dBFS input and 22Hz/22kHz bandpass filter)
  • Noise: -90dBu (22Hz/22kHz bandpass filter)
  • Line 1-8 Gain: -10dB to +36dB
  • Maximum input level +26dBu

Instrument Input

  • Frequency Response: 20Hz - 20kHz +/- 0.1dB
  • THD+N: 0.004% (measured with 0dBu input and 20Hz/22kHz bandpass filter)
  • Noise: -87dBu (20Hz/22kHz bandpass filter)
  • Instrument Gain: +10dB to +55dB
  • Maximum input level +16dBu

Analogue Output

  • Frequency Response: 20Hz – 20kHz +/- 0.2dB.
  • THD+N <0.0010% (-100dB) (measured with 0dBFS input 22Hz/22kHz bandpass filter, un-weighted)
  • Nominal output level 0dBFS = 16dBu, balanced

Compression

  • Threshold Range: -44dBFS (Max setting) to -4dBFS (Min setting)
  • Compression Ratio Normal: 2:1, More: 4:1
  • Auto Make Up Gain: 4dB (Min setting), 18dB (Max setting)
  • Attack Time: 1.2ms, Release Time: 28ms (-3.5dB method)
  • Compression Curve: Classic Focusrite Soft Knee
  • THD+N (maximum at any compression threshold, input < +16dBu, gain at minimum): < 0.18%

Digital

  • A/D Dynamic Range 110dB ‘A-weighted’ (all inputs)
  • D/A Dynamic Range 110dB ‘A-weighted’ (all outputs)
  • Clock Jitter < 250 pico seconds
  • Sample rates: 44.1kHz to 96kHz
  • Sample Rate Clock Accuracy: +/- 20PPM
  • JetPLL technology providing superb jitter reduction for class leading converter performance
  • Clock sources: Internal, Word Clock and ADAT (from ADAT1 input only)

Weight

  • Single unit unboxed net weight : 3.6 kg / 7.3 lbs
  • Single unit boxed net weight : 4.05 kg / 8.9 lbs

Dimensions

  • Unboxed: W = 484mm / 19”, H = 45mm / 1.8”, D = 265mm / 10.4”
  • Boxed: W= 595 mm / 23.5”, H= 120 mm / 4.75”, D= 340 mm / 13.4”

FRONT AND REAR CONNECTIVITY

Analogue Channel Inputs:

  • 2x Mic / Line / Instrument inputs on the rear panel (Inputs 1 and 2). Switches automatically between Mic (XLR) and Line (TRS). Instrument selected via front panel buttons.
  • 6x Mic / Line inputs on the rear panel. Switches automatically between Mic (XLR) and Line (TRS).

Analogue Channel Outputs:

  • 8x Balanced 1/4" TRS Jack on the rear panel
  • Switching to enable monitoring of A/D inputs or ADAT inputs with ADDA switch on front panel.

Digital I/O:

  • 2x ADAT Lightpipe (TOSLINK) inputs. Provides 8 channels at 44.1 and 48kHz (please note that in this mode, only ADAT input 1 is active, allowing for a total of 8 ADAT input channels at 44.1 / 48kHz). Provide 4 channels per port (8 total) at 88.2 and 96kHz (S-MUX).
  • 2x ADAT Lightpipe (TOSLINK) outputs. Provides 8 channels per port (16 total) at 44.1 and 48kHz (please note that in this mode, the digital outputs are mirrored, providing outputs 1 - 8 on both ports). Provides 4 channels per port (8 total) at 88.2 and 96kHz (S-MUX).
  • Word-Clock in and out on rear panel BNC connectors

Front Panel Indicators:

  • 8x Five segment input LED meters (-42, -18, -6, -3 and 0dBFS)
  • 4x Sample Rate LED's (44.1k, 48k, 88.2k and 96k)
  • 3x Sync Source LED's (Internal, Word Clock and ADAT)
  • 'Lock' indicator LED
  • ADDA Switch for analogue output source selection (A/D’s or ADAT inputs)