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OctoPre MkII Dynamic

OctoPre MkII Dynamic
Eight Focusrite mic pres with compression and excellent A-D & D-A conversion

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)