Sound Performance Lab 2273, 2272 manual Phantom, Control elements, Imped. Ω, GainStation

Control elements

IMPED. Ω IMPED. Ω

10k	This 3-way switch allows you to select between three input
1.2k
200	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

On

Off

48V

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.

16 GainStation 1