Focusrite Clarett+ OctoPre User Manual

9
USING THE CLARETT+ OCTOPRE
COMBO INPUTS
All eight analogue inputs use “Combo XLR” connectors. These accept male XLR connectors, TS
(unbalanced) ¼” jacks or TRS (balanced) ¼” jacks.
When you use an XLR connector, the preamp automatically configures gain and impedance to receive
microphone level signals. If using a ¼” plug, the preamp accepts balanced or unbalanced line level
signals. When you enable INST mode (Channels 1 or 2), the 1/4” input is optimised for an unbalanced,
high impedance signal.
LINE OUTPUTS
You can connect the line outputs of the Clarett+ OctoPre to the analogue line inputs of outboard
equipment (or any other device), to use it either as an analogue, 8-channel microphone preamplifier,
or as an analogue “break-out box” for ADAT signals when in ADAT>LINE mode.
The outputs are balanced; see [20] on page 7 for the pinout. Ready-made DB25-to-XLR or
DB25-to-jack breakout cables are available from professional audio suppliers.
DIGITAL OUTPUTS
Use the OPTICAL OUT ADAT port(s) [18] to connect the Clarett+ OctoPre to the ADAT input(s) of an
audio device using TOSLINK optical cable(s).
The ports can send eight channels of audio at 44.1 kHz or 48 kHz sample rate via a single optical
cable. At these sample rates, the two ports carry the same eight channels.
At 88.2 kHz or 96 kHz sample rates, each port sends four channels. The right-hand port carries
Channels 1 to 4, the left-hand port carries Channels 5 to 8; you need two TOSLINK cables to send all
eight channels.
At 176.4 kHz or 192 kHz sample rates, each port can transmit two channels. The right-hand port
carries Channels 1 and 2, the left-hand port carries Channels 3 and 4. The OctoPre is restricted to
four channels of digital audio at these sample rates; the outputs of Channels 5 to 8 are not available
via the ADAT ports.
Use the SAMPLE RATE switch [9] to select the sample rate frequency. It is essential the sample rate
selected on the Clarett+ OctoPre matches the sample rate set on the receiving digital device.

Focusrite Clarett+ OctoPre Specifications

General

XLR inputs	8
Digital audio optical out	2
Power supply included	Yes
Gain	57 dB
Control type	Buttons, Rotary
Product color	Black, Red
LED indicators	Power, Signal strength
Frequency range	20 - 35000 Hz
Built-in display	No

Weight and Dimensions

Depth	286 mm
Width	482 mm
Height	44.5 mm
Weight	4150 g