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Section 3 - Basic Operation
3.1 Connecting the 286s to Your System
The 286s can be used with any low-level microphone signal (via the MIC INPUT) or any
line-level device (via the LINE INPUT). Some common line-level devices include: mixing
consoles, electronic musical instruments, patch bays, and signal processors. For all
connections, refer to the following steps:
1. Turn Off all equipment before making any connections.
2. Mount the 286s in a rack. (Optional)
Caution: Never remove the cover. There are no user-serviceable parts inside.
The 286s requires one rack space (height) and one rack space (width). It can be mounted
above or below anything that doesn’t generate excessive heat, since it requires no special
ventilation. Ambient temperature should not exceed 113°F (45°C) when equipment is
powered.
3. Make connections via rear panel jacks and connectors according to your requirements.
A. Connect a microphone to the MIC INPUT XLR connector or a line level source to the
1/4” LINE INPUT jack.
B. Important: DO NOT connect anything other than a microphone to the MIC INPUT.
C. Connect the load (e.g., mixer, recorder, etc.) to the 286s LINE OUTPUT jack.
D. Connect an external processor or effects device to the 1/4” INSERT jack. (Optional)
4. Connect the AC power cord to the AC power receptacle on the back of the unit.
Note: We recommend you always power on the unit with the MIC GAIN control set to its
minimum level (fully counterclockwise). This will help in safeguarding your system against
sudden spikes and surges, as well as possible acoustical feedback if a microphone is
connected and left “open.”
Note: Check the line voltage (printed on 286s) and verify that it is correct.
3.2 Understanding the 286s Mic Preamp
The 286s Mic Preamplification Section includes support for phantom-powered mics, a highpass
filter, and an input gain control. Note that these controls are applied to the input signal
before the signal is processed by the 286s Processing Section.
Phantom power is available at the push of a button, providing +48VDC to phantom-powered
microphones. The 286s phantom power is sufficient for most microphones, However, some
vintage condenser mics may require a separate power source.
286s
Section 3
Basic Operation