Alesis Studio 12R 12-Channel Analog Mixing Console
The Alesis Studio 12R is a high-quality, rack-mountable 12-input, stereo output audio mixer. It is designed to handle eight microphones, two stereo line inputs, and to route signal to and
from external effect processing devices. As a basic, easy-tounderstand mixer, it can be used in a wide variety of applications from sound reinforcement to multitrack recording. It may also be used as an accessory or submixer to a larger console.
Specifications
Frequency Response
10 Hz – 65 kHz +0/-1 dB (any input to any output at
nominal operating levels)
-3dB Point: 125 kHz
Connectors
MIC IN jacks: Female XLR
(Pin 1 ground, Pin 2 +, Pin 3 -)
LINE IN jacks: Female 1/4" 3-conductor phone
(Tip = +, ring = -, sleeve = ground)
INSERT jacks: Female 1/4" 3-conductor phone
(Tip = send, ring = return, sleeve = ground)
Inserting plug to first "click" allows direct output without breaking normal signal flow
STEREO LINE IN and STEREO AUX RETURN jacks: Female 1/4" 3-conductor x 2
MAIN OUT BALANCED, MONITOR OUT, and AUX SEND jacks: Female 1/4" 3-conductor phone (Tip = +, ring = -, sleeve = ground)
MAIN OUT -10 dBV jacks: Female phono ("RCA") jacks
TAPE IN jacks: Female phono ("RCA") jacks
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 (>20 k Ω load impedance)
OUTPUTS (MAIN, AUX and MON): 150 Ω unbalanced, 300 Ω balanced 1.1 k Ω at -10dBV MAIN OUTS
Noise performance (typical)
Measured at MAIN OUT +4 dBu jacks, unbalanced load, 22 Hz to 22 kHz, all channels panned to center.
MIC IN to INSERT OUT: -128.5 dBu Equivalent Input Noise at maximum gain
Residual output noise (MASTER fader at nominal, channel faders at minimum): <-88 dBu
12 inputs, faders and trims at unity gain, inputs terminated 150Ω: <-85 dBu unbalanced (+22 dB max unbalanced out = 107 dB dynamic range)
Distortion (THD+N)
Measured with a 0 dBu signal coming into a MIC IN jack with trim set for a
+15 dBu output from the insert jack.
At INSERT jack: Better than 0.0010%
At MAIN OUT (+21 dBu balanced output level) Better than 0.0015%
Power
U.S.A. model: 120 VAC, 60 Hz, 40 watts power consumption maximum
Mounting
19" EIA rack mountable, 3 spaces
