M-Audio Firewire 1814 [10/61] Controls and connectors

6 Controls and Connectors

Front Panel

Front Panel Descriptions

1. Mic/Inst Inputs – These Neutrik hybrid connectors will accept a low-impedance

mic level signal on a standard three-pin balanced XLR or TRS plug, or a high-

impedance instrument level signal on an unbalanced 1/4” TS plug.

2. Mic/Line Selector – This switch toggles the unit between the front panel Mic/Inst

inputs and the rear panel Line Inputs. Set to the OUT position, the Mic/Inst inputs

are selected and active, and the Line Inputs are defeated; Set to the IN position,

the Line Inputs are selected and active, and the Mic/Inst Inputs are defeated.

3. Pad – With this switch in the IN position, a 20dB pad is inserted into the input

circuit, lowering the mic or instrument input level. Use this PAD when the input

level of your analog signal is too hot – as indicated by illumination of the CLIP LED

– even with the INPUT GAIN LEVEL at or near minimum.

4. Input Gain Level – This potentiometer controls the input level of its associated

analog Mic/Instrument input. When the Mic/Instrument Input is in use, the variable

gain range is >40dB.

5. Signal and Clip Indicator LEDs – The Signal LED indicates the presence of an audio

signal at the associated Mic/Inst input, and will light when signals reach levels of

–30 dB or higher. The Clip LED will light when the signal is 1dB below the clipping

point. If the Clip LED lights often or stays lit for any period of time, lower the Input

Gain Level on that channel.

6. Headphone Outputs 1 & 2 – These jacks accept standard 1/4” stereo TRS headphone

plugs. Each headphone output has an associated level controller to control listening level.

Only headphone output 1 will respond to the A/B source selection, when the A/B selector

switch is configured for headphone source selection (see the “Hardware Page” section, “A/B

Source Switching” for more information, and also “Using the A/B Selector Switch”). When

using at 192kHz sampling rate outputs 1 & 2 are monitored in Headphone 1 while outputs 3

& 4 are monitored in Headphone 2.