Sound Performance Lab Gain Station 2272 - Manual (Page 16)

16 GainStation 1
IMPED. Ω
This 3-way switch allows you to select between three input
impedances for the MIC input. The effect varies depending
on the microphone used. With dynamic microphones, a lower
impedance setting will also reduce the input level—this effect is
less pronounced with good condenser microphones. We recom-
mend the 10 k (Ω) setting for most applications, although some
microphones may benefit from a different setting.
PHANTOM
The GainStation 1 provides 48-Volt phantom power for micro-
phones requiring external current (generally condenser micro-
phones). Such microphones are dependent upon a clean, consis-
tent and noise-free power supply for optimal operation and
audio quality. The GainStation 1 continuously delivers precisely
48 V and a maximum of 14 mA, which will power all micro-
phones.
IMPORTANT NOTE: All microphones with balanced, ground-free
outputs, including tube microphones, can be used with the
phantom power activated. First connect the microphone to the
GainStation 1, then activate the phantom power. When finished,
first deactivate the phantom power and wait at least 30 seconds
before disconnecting the microphone to allow residual current
to discharge.
Phantom power should only be activated when using micro-
phones that require it. Please be sure to deactivate phantom
power with all other microphones. Unbalanced microphones
may only be used with phantom power deactivated.
The 48V LED illuminates to indicate activated phantom power.
When deactivating phantom power, it can take several seconds
for the LED to go out, since the 48-V current dissipates rather
slowly. When changing microphones, you should wait until the
LED is completely dark before re-patching.
Control elements
1.2
k
200
IMPED. Ω
10 k
On
PHANTOM
Off
48
V