Focusrite Clarett 8PreX Thunderbolt Audio Interface
November 10, 2017
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November 10, 2017

Focusrite Clarett OctoPre

£655.00 (Inc VAT)

8 Channel Mic Pre and AD/DA Converter

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8 In. 8 Out. Over ADAT.

Whatever you record, however you work, there will come the day that you need more inputs. Clarett OctoPre gives you eight – and eight outputs too – that you can use to extend the capabilities of your Clarett Thunderbolt audio interface – or any other interface fitted with ADAT optical inputs and outputs.

Eight Clarett Mic Pres with extra ‘Air’

The mic pres have been designed specifically for the Clarett range, with plenty of gain, yet low noise and distortion – and great sound quality. They include a special “Air” feature that switches in an analogue model of the classic transformer-based Focusrite ISA mic pre, switching the impedance of the preamp to that of the original ISA, and enabling a ‘transformer resonance effect’, giving your microphone recordings the air and clarity of an ISA transformer-based mic pre recording. In addition, the mic pres have plenty of headroom and are ideal for recording drums and other extreme level sources.

Mic, line and instrument inputs- plus eight outputs

The front panel includes dual instrument inputs featuring extra headroom to handle the loudest pickup, while the rear panel includes universal XLR/jack connectors for the remaining auto-switching mic/line inputs. In addition, each input has its own switched insert point for single-cable connection of compression, equalisation and other outboard analogue processing – with hard-wired relay bypass so you can leave outboard gear or a patchbay connected ready to access at the press of a button.

In addition to providing eight mic pres with 24-bit, 192kHz A-D conversion, the Clarett OctoPre offers D-A conversion of up to eight ADAT digital channels feeding 25-pin DSUB rear-panel analogue outputs, making it useful for mixing as well as tracking. The line outputs can optionally provide line level output feeds from the mic pres – useful for feeding a live console, for example, while recording the digital outputs. Aside from the insert point, the Clarett OctoPre is balanced end to end for exceptional noise immunity.

Precision Digital Conversion

There’s no point in having the superb-quality mic preamps in the Clarett OctoPre without equally superb digital conversion to back them up. Focusrite has been making digital audio converters almost as long as mic preamps, and those in the Clarett OctoPre ensure that you maintain the highest possible quality getting your music in and out of your DAW. The Clarett OctoPre’s precision 24-bit converters operate at standard sample rates all the way up to 192kHz – ideal for hi-res audio – with up to 118dB (A-D) /119dB (D-A) dynamic range.


Supported Sample Rates
44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz

Microphone Inputs
Frequency Response 20 Hz – 20 kHz +/-0.1 dB
Dynamic Range 118 dB (A-weighted)
THD+N 0.001%
Noise EIN –128 dBu (A-Weighted)
Maximum input level +18 dBu
Gain Range 57dB

Line Inputs
Frequency Response 20 Hz – 20 kHz +/-0.1 dB
Dynamic Range 116 dB (A-weighted)
THD+N 0.005%
Maximum input level +26dBu
Gain Range 57dB

Instrument Inputs
Frequency Response 20 Hz – 20 kHz ± 0.1 dB
Dynamic Range 111 dB (A-weighted)
Maximum input level +14dBu
Gain Range 57dB

Line & Monitor Outputs
Dynamic Range (Line Outputs) 119dB
Dynamic Range (Monitor Outputs) 117dB
Maximum Output Level (0 dBFS) +18 dBu

Headphone Outputs
Dynamic Range
Maximum Output Level



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