Focusrite OctoPre MkII Mic Preamp


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OctoPre MkII Mic Preamp
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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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