Focusrite OctoPre MKII

With eight channels of Focusrite preamplification and a built-in 24-bit / 96 kHz ADAT output, OctoPre MkII is Focusrite’s powerful input upgrade for your Pro Tools system, or any digital audio workstation. It’s also a great expansion for any analogue or digital console, or hard disk recorder.

The digital output allows you to make the most of often-neglected ADAT inputs; ideal for expanding the number of mic pre inputs on your interface. Connect OctoPre MkII to your audio interface’s ADAT input to create a high quality, multi-channel recording solution, ideal for tracking drums, as well guitars, keyboards, vocals and more.

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


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.


3.6 kg / 7.93 lbs


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


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

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