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.
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
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