Alesis 12R manual Levels, Impedance

Specifications

Levels

MIC IN	-60 dBu to -10 dBu nominal,
	maximum level +12 dBu
LINE IN	-40 dBu to +10 dBu nominal,
	maximum level +32 dBu
	(balanced)
STEREO LINE IN	-15 dBu to +15 dBu nominal,
	maximum input level +22 dBu
MAXIMUM GAIN	+76 dB, MIC IN to MAIN OUT,
	balanced
	+80 dB, MIC IN to MONITOR
	OUT, balanced or unbalanced
CHANNEL PEAK LED ON:	6 dB below channel clipping
METER:	Peak type
	-24 dB to PK (+18 dB over
	reference at MAIN OUT, 6 dB
	before output clipping)
MAIN OUT LEVEL (1/4" phone jacks) (when meter is at 0 VU)
	+4 dBu (1.24 volts)
	into a balanced load
	-2 dBu into an unbalanced load
MAIN OUT LEVEL (phono jacks)	-10 dBV (.316 volts) unbalanced
MAXIMUM OUTPUT LEVEL	+22 dBu unbalanced, +28 dBu
	balanced (6 dB above "PK"
	segment of main meter)
MONITOR OUT LEVEL	Same as above, but variable
	following MONITOR/PHONES
	control
INSERT/DIRECT OUT (tip)	Unity gain
INSERT IN (ring)	Maximum level +22 dBu
HEADROOM:	23.5 dB above nominal output

Impedance

MIC IN	50-150 Ω nominal source
	impedance (presents 4 k Ω
	balanced load impedance)
LINE IN	600 Ω-2 k Ω nominal
OUTPUTS (MAIN, AUX and	(>20 k Ω load impedance)
MON):	150 Ω unbalanced,
	300 Ω balanced
	1.1 k Ω
	at -10dBV MAIN OUTS