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OctoPre MkII

OctoPre MkII
Eight Focusrite mic pres with excellent A-D 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 + 55 dB
  • Input Pad: ~-10 dB
  • Phantom power switched in 2 x 4 channel groups (1-4 and 5-8)
  • Maximum input level: +8 dBu (+17 dBu with pad on input)

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: -10 dB to +36 dB
  • Line maximum input level: +22 dBu

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: +10 dB to +55 dB
  • Maximum input level: +8 dBu

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: 16 dBu, balanced

Digital

  • A/D Dynamic Range 110dB 'A-weighted' (all inputs). 
  • JetPLL™ Technology providing superb jitter reduction for class leading converter performance. 
  • Clock Jitter < 250 pico seconds. 
  • Sample Rate Clock Accuracy: +/- 20PPM. 
  • Sample rates: 44.1kHz to 96kHz.
  • Clock Sources: Internal and Word Clock.

Weight

  • 3.6 kg / 7.93 lbs

Dimensions

  • W = 484mm / 19”, H = 45mm / 1.8”, D = 265mm / 10.4”

FRONT AND REAR CONNECTIVITY

Analogue Channel Inputs:

  • 2x Mic / Line / Instrument inputs on the front panel (Instrument selected via front panel button)
  • 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

Digital Channel Outputs:

  • 2x ADAT Lightpipe (TOSLINK) outputs. Provides 8 channels per port (16 total) at 44.1 and 48kHz.
  • Provide 4 channels per port (8 total) at 88.2 and 96kHz (S-MUX).

*Note that when running at 44.1 or 48kHz, the digital outputs are mirrored, providing outputs 1 - 8 on both ports.

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)
  • 2x Sync Source LED's (Internal and Word Clock)
  • 'Lock' indicator LED