Focusrite Clarett 4Pre USB User Manual

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2. Recording a drum kit with (and without) the optical connection
In addition to the eight analogue inputs, the Clarett 4Pre USB has an ADAT input port (OPTICAL IN)
which can provide an additional 8 audio inputs at 44.1/48 kHz sample rate or four at 88.2/96 kHz.
Using a separate 8-channel microphone preamplifier equipped with an ADAT output – such as the
Clarett OctoPre – provides a simple and excellent method of expanding the Clarett 4Pre USB’s input
capability. This could, for example extend the scope of the recording example above to include a
close-miked drum kit, as shown below.
The Clarett OctoPre’s OPTICAL OUT port is connected to the Clarett 4Pre USB’s OPTICAL IN port
with a single TOSLINK optical cable. The two devices must be synchronised to ensure audio passes
cleanly, without clicks and pops. This can be achieved by selecting ADAT as the clock source on the

Focusrite Clarett 4Pre USB Specifications

General

Gain	57 dB
Control type	Buttons, Rotary
Sample rates	44.1 - 192 kHz
On/off switch	Yes
Phantom power	48 V
Product color	Black
LED indicators	Power, Signal strength, USB
Frequency range	20 - 35000 Hz
Built-in display	No
Mac operating systems supported	Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan
Total Harmonic Distortion (THD)	0.001 %
Windows operating systems supported	Windows 10, Windows 7, Windows 8.1
USB port type	USB Type-C
USB ports quantity	1
6.35 mm (1⁄4-inch) input	4
6.35 mm (1⁄4-inch) output	6
DC output voltage	12 V

Weight and Dimensions

Depth	192 mm
Width	222 mm
Height	63.5 mm
Weight	1350 g