4
Quick Start Guide –
Microphone Settings
The mixer allows you to tailor operating features for each microphone. Make these
selections with the bottom-panel switches shown below:
The
COMPRESSION
and
Phantom Power
switch banks each have numbered switches
corresponding to the eight microphone channels (1-8). Set each switch using a pen or
similar pointed tool. Some suggestions for each feature:
Compression
– The ON position is recommended for most situations. Compression limits
unusually loud sounds from each mic, increasing audience comfort. It works unobtrusively, so you can
enable compression with confidence. However, we recommend you select no compression (switch
OFF) for any microphone where its user may need extra level – for example, speaking above the noise
to bring a meeting to order. Often this means choosing compression OFF for the “main” mic.
Phantom Power
– Leave OFF for dynamic or wireless microphones. Select ON for each input
from a condenser microphone. If a particular microphone input is used with a variety of microphones
including condenser mics, choose ON. Most condenser microphones
require
phantom power.
Dynamic mics don’t need it, but should tolerate it.
Quick Start Guide –
Setting Audio Levels
This mixer has a balanced line output for professional equipment, and an auxiliary
output for consumer-grade amplifiers and other devices. The balanced output is capable of
a high level: +28dBv. Following equipment should be capable of a similar maximum level.
When any equipment is driven beyond its maximum level, it “clips”, flattening audio peaks –
resulting in a characteristic distorted sound. You get the least noise from your equipment
(best
signal-to-noise ratio
) when everything clips at the same level. Thus, it’s best if
following equipment can handle at least +28dBv.
Check the specifications of following gear. If for example your equalizer can handle
only +22dBv at its balanced input, you need to reduce your mixer’s output by 6 dB. Since
your mixer has an output impedance of 600 ohms, you can reduce its output by loading it
with a resistor. A 600 ohm load lowers the output by 6dB. Other values can be used, as
shown next page. Wire this resistor into the connector at either end of the cable between
the mixer’s balanced output and the balanced input of the next device, as shown:
Gating
Threshold
Compression
Phantom
Power
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
ON
