Focusrite - OctoPre MkII Dynamic - 8-Channel Microphone Preamp w/Compressors

Item # SRSOCTOPREMKIID
| Mfg # OCTOPREMKIIDYNAMIC
| UPC # 815301008101
Our Price: $699.99
Retail: $799.99 | You Save: 12%
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With eight channels of Focusrite microphone pre-amplification, eight VCA-based Red 3-derived compressors and built-in 24-bit / 96 kHz digital inputs and outputs, OctoPre MkII Dynamic is Focusrite's feature-rich expansion upgrade for any digital audio workstation. It's equally an ideal expansion for any analogue or digital console, or hard disk recorder.

Digital inputs and outputs let you make the most of often-neglected ADAT i/o; ideal for expanding the number of mic-pre inputs on your interface or for providing analogue monitoring from any digital ADAT feed. With this entire package fitting into a single 1U chassis complementing Focusrite's Saffire PRO range, and all controls adjustable from the front fascia, OctoPre MkII Dynamic sets the standard for modern, compact, multi-channel recording expansions.

With just a single dial, these eight 'recording' compressors allow you to get to the desired amount of compression for each channel, fast, providing a natural but loud sound. The single dial solution decreases the threshold, and increases the makeup gain simultaneously, the result of which is a sound that gets progressively more compressed but retains a good output level.

The compressors uses a soft-knee progressive compression curve, modeled on the properties of the Red 3 compressor, and featuring a fixed Attack time of 1.2 ms and Release time of 28ms. The circuit has been tuned by ear at Focusrite and these settings were chosen after critical listening and analysis of the Red 3. Bass guitar and drums were put through the Red 3 compressor, and the threshold, ratio, attack and release envelopes were modified until the desired 'controlled' sound was achieved. These settings were then applied to the new VCA circuit where the soft knee and ratio curve had been duplicated. A further listening then helped to tweak the settings and ensure that the compressors behaved as expected.

The compressor has two modes: Normal and 'More', which let you change the behavior of the compressor to suit different instruments. Whist the Red 3 is well known and loved for its sympathetic approach to compression, it's not regarded as an 'effect' compressor. However, with the OctoPre MkII Dynamic's 'More' button, found on each compressor, you can bring a bit of aggression to your sound. The More button doubles the ratio from 2:1 to 4:1 and shifts the threshold range, so you have more sensitivity on control. The threshold is closed down, working across a smaller range, as you're applying threshold control over a much louder signal.

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 + 55dB
  • Phantom power switched in 4 channel groups on Mic. 1-4 and 5-8
  • Maximum input level +16dBu

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: -10dB to +36dB
  • Maximum input level +26dBu

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: +10dB to +55dB
  • Maximum input level +16dBu

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 = 16dBu, balanced

Compression

  • Threshold Range: -44dBFS (Max setting) to -4dBFS (Min setting)
  • Compression Ratio Normal: 2:1, More: 4:1
  • Auto Make Up Gain: 4dB (Min setting), 18dB (Max setting)
  • Attack Time: 1.2ms, Release Time: 28ms (-3.5dB method)
  • Compression Curve: Classic Focusrite Soft Knee
  • THD+N (maximum at any compression threshold, input < +16dBu, gain at minimum): < 0.18%

Digital

  • A/D Dynamic Range 110dB ‘A-weighted’ (all inputs)
  • D/A Dynamic Range 110dB ‘A-weighted’ (all outputs)
  • Clock Jitter < 250 pico seconds
  • Sample rates: 44.1kHz to 96kHz
  • Sample Rate Clock Accuracy: +/- 20PPM
  • JetPLL technology providing superb jitter reduction for class leading converter performance
  • Clock sources: Internal, Word Clock and ADAT (from ADAT1 input only)

Weight

  • Single unit unboxed net weight : 3.6 kg / 7.3 lbs
  • Single unit boxed net weight : 4.05 kg / 8.9 lbs

Dimensions

  • Unboxed: W = 484mm / 19”, H = 45mm / 1.8”, D = 265mm / 10.4”
  • Boxed: W= 595 mm / 23.5”, H= 120 mm / 4.75”, D= 340 mm / 13.4”

FRONT AND REAR CONNECTIVITY

Analogue Channel Inputs:

  • 2x Mic / Line / Instrument inputs on the rear panel (Inputs 1 and 2). Switches automatically between Mic (XLR) and Line (TRS). Instrument selected via front panel buttons.
  • 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
  • Switching to enable monitoring of A/D inputs or ADAT inputs with ADDA switch on front panel.

Digital I/O:

  • 2x ADAT Lightpipe (TOSLINK) inputs. Provides 8 channels at 44.1 and 48kHz (please note that in this mode, only ADAT input 1 is active, allowing for a total of 8 ADAT input channels at 44.1 / 48kHz). Provide 4 channels per port (8 total) at 88.2 and 96kHz (S-MUX).
  • 2x ADAT Lightpipe (TOSLINK) outputs. Provides 8 channels per port (16 total) at 44.1 and 48kHz (please note that in this mode, the digital outputs are mirrored, providing outputs 1 - 8 on both ports). Provides 4 channels per port (8 total) at 88.2 and 96kHz (S-MUX).
  • Word-Clock in and out on rear panel BNC connectors

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)
  • 3x Sync Source LED's (Internal, Word Clock and ADAT)
  • 'Lock' indicator LED
  • ADDA Switch for analogue output source selection (A/D’s or ADAT inputs)
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Product Warranty Information

 
Focusrite
 
Tel: (866) 362-8774; Email: support@focusrite.com; Focusrite Website | Website Contact | Warranty Info; 1 year Parts and Labor

 

 
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Focusrite was established in 1985 and the founding principles of the company were to develop products that sounded more musical, in addition to just measuring well. Based just outside of London, they work with the best design talent throughout the world.