Focusrite OCTOPRE-MKII
8 Channel Preamp

With eight channels of Focusrite pre-amplification 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 users 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.

Key Features:

• Eight High Quality Award-winning Focusrite Pre-amps
• Built-in eight channel 24-bit / 96 kHz digital output
  Make the most of your interface’s ADAT input. OctoPre connects via its built-in lightpipe output, with a ‘real world’ dynamic range performance of 110dB.
•  Mic-pres optimised for tracking drums
  OctoPre MkII is designed not to clip, with pre-amps optimised to handle extreme levels from sound sources like kick drum and snare.
• Two quality Hi-Z instrument inputs
  OctoPre MkII’s first two channels feature DI’s, ready for you to plug in your Guitars and Bass, instantly accessible on the front fascia.
• 5 LED input metering on every channel
  OctoPre MkII’s fast-acting 5-LED input meters provide clear reference of input levels, helping you to avoid analogue or digital clipping.
• -10dB Pads on every channel
  OctoPre MkII is drum-ready, with 10dB pads to stop hot signals from overdriving the microphone pre-amp.
• Direct outputs on every channel
  For routing and flexibility, especially in the live environment. Each mic-pre can be routed to the mixer’s analogue channels, with two mirrored ADAT outputs (44.1) left free to send to digital recorders.
•  48V Phantom power available on every channel
  Switched in two groups (1-4 and 5-8) every channel is capable of supplying phantom power, for use with most condenser microphones.
• State-of-the-art Clocking Solutions
  OctoPre MkII's internal clock delivers a jitter performance of < 10 PPM. For external clocks, a BNC connector is provided and industry-standard JetPLL™ jitter elimination technology is employed.

Connectivity

CHANNELS AT A GLANCE

IN
No. Format Connector Details
2 mic/line/Inst Combi XLR Switch to instrument via front panel
6 mic/line Combi XLR On the rear.

OUT
No. Format Connector Details
8 Analogue line 1/4" TRS Jack Balanced
16 ADAT Dual lightpipe 8 channels at 96kHz
(Lightpipes are mirrored at 48kHz)

Analogue inputs

• Mic / Line inputs on XLR Combo with auto-switching between Mic (XLR) and Line (TRS)
• Mic / Line / Instrument on Channels 1 & 2: 2 x XLR Combos on front panel
• Mic / Line 3-8: 6 x XLR Combo on rear.
• Instrument: As above, switched to Instrument (inputs 1 & 2 only)

Analogue Outputs

• Line level 8 x 1/4” TRS Jack.

Digital I/O

• ADAT Out 1 & 2: 8 channels (44.1 / 48kHz, 16 channels total); 4 channels S-MUX (88.2 / 96kHz, 8 channels total)
Running at 44.1/48kHz will ultimately provide the user with 2 sets of 8 outputs (mirrored)

Power

• Internal Universal Input PSU.

Front Panel Indicators

• Metering of analogue inputs (channels 1-8), 5 segment (-42, -18, -6, -3 and 0dBFS).
• 4 Sample Rate LED’s (44.1k, 48k, 88.2k & 96k).
• 2 Sync Source LED’s (Internal, Word Clock).
• ‘Lock’ Indicator LED.

Performance

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.

Analogue:

Microphone 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).

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).

Instrument

• 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).

Analogue Output

• Frequency Response: 20Hz – 20kHz +/- 0.2dB.
• THD+N < 0.0010% (-100dB) (measured with 0dBFS input 22Hz/22kHz bandpass filter, un-weighted).

Specifications

• Mic Gain: +10dB to + 55 dB
• Line 1-8 Gain: -10 dB to +36 dB
• Instrument Gain: +10 dB to +55 dB
• Input Pad on inputs 1-8: ~-10 dB

• Phantom power switched in 2 x 4 channel groups (1-4 and 5-8)

• Mic and instrument maximum input level: +8 dBu (+17 dBu with pad on input)
• Line maximum input level: +22 dBu
• Nominal output level @ 0dBFS: 16 dBu, balanced

• Sample rates: 44.1kHz to 96kHz.

• Clock Sources: Internal clock and sync'ing to Word Clock Input.

• Dimensions: W = 484mm / 19”, H = 45mm / 1.8”, D = 265mm / 10.4”
• Weight: 3.6 kg / 7.93