Presonus Audio electronic Microphone Preamplifier user manual Firestudio

CONTROLS AND CONNECTIONS

FIRESTUDIO™

1 2

Mic Instrument

•Instrument Inputs (Channels 1 and 2). The ¼” TS connector on channels 1 and 2 are for use with an instrument (guitar, bass, etc.). When an instrument is plugged into the instrument input, the microphone preamp is bypassed, and the FireStudio Project becomes an active instrument preamplifier.

NOTE: Active instruments are those that have an internal preamp or a line level output. Active instruments should be plugged into a line input rather than into an instrument input. Plugging a line level source into the instrument inputs on the front of the FireStudio Project not only risks damage to these inputs but also results in a very loud and often distorted audio signal.

(In other words, don’t plug a line level source into the combo jacks of channel 1 or 2.)

-10 0 1 60+30 -10 0 260+30 -20 0 360+20 -20 0 460+20 -20 0 560+20 -20 0 660+20 -20 0 760+20 -20 0 860+20

•Input Gain/Trim Control. These knobs provide the following gain structure:

oXLR Microphone Inputs. 54 dB of variable gain (-4 dB to +50 dB)

oTS ¼” Instrument/Hi-Z Inputs. 54 dB of variable gain (-4 dB to +50 dB)

o TRS ¼” Line Inputs. 32 dB of variable gain (-16 dB to +16 dB trim adjustment)

1	2	3	48V	4	5	6	7	8
	48V	0dB		0dB		48V	0dB	48V
		-6dB		-6dB			-6dB
	1/ 2	-40dB	3/ 4	-40dB		5/ 6	-40dB	7/ 8

•LED Meters / Clip Indicator. Each channel features three LED level indicators. The green LED will light up when your input signal from the XLR (Mic) or ¼” (line) reaches -40 dBFS. The yellow LED will light up when the channel’s input signal reaches -6 dBFS (+4 dBu). The red clip indicator LED will illuminate when the channel’s input signal reaches 0 dBFS. At this level, your mic preamp/line trim signal will exhibit signs of clipping such as distortion. It is highly recommended you do not allow your converters to clip (the red clip indicators to light up) as the sound quality will not be desirable.

22 PreSonus 2007