SM Pro Audio Q-Pre: 4 channel microphone preamp - Manual (Page 5)

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6. APPLICATION
6.1 Using the Q-Amp as a headphone amplifier
Connect a stereo (L&R) program source (2 x 1/4” Inch Jacks) to the rear of the
Q-Amp using one of the available 2 x stereo input pairs on the rear panel. You can
also connect a Mono signal to the input channel and split the signal into both sides
of the headphone.Connect a set of headphones using a stereo 1/4 Inch cable to
any of the headphone outputs on the front of the Q-Amp. Select the source signal
from the selector switch for the channel in use. Set to an appropriate level for
monitoring. Owing to the four independent channels of the Q-Amp, four individual
mixes for four musicians can be achieved with a single unit. In the application of
studio recording, you can configure sub-groups, aux sends or single outputs of
your audio mixer to feed signal independently to the Q-Amp. This enables each
musician to receive a specific configuration of instruments of their choice in there
headphones. Note: If four headphone outputs are not enough, you can interface
and link any number of Q-Amp’s for additional outputs.
6.2 Chaining multiple Q-Amp’s
It is very easy to chain multiple Q-Amp’s together. Use appropriate stereo 1/4 Inch
jack > to Y (2 x mono) cables and make connections from one of the outputs to
the stereo (L&R) audio inputs on the rear of your second Q-Amp. This effectively
allows an addition 3 x headphone outputs. You can continue to chain as many
units as you want using this procedure.
7. SPECIFICATIONS
AUDIO INPUTS: Connectors 1/4“ jack
Type unbalanced
Impedance 47k Ohms
Peak input level +25dB
Gain control range 40dB
HEADPHONE POWER AMPLIFIER OUTPUTS:
1/4” and 1/8” stereo outputs
Max. output level 300mW@32 Ohms (max 1W@32 Ohms)
Output impedance 22 Ohms
Max. gain +20 dB
DIST, FREQ, S/N RATIO & CROSSTALK:
Frequency response 20Hz~20kHz, 0dB~-2B
Distortion 0.02%
S/N Ratio better than 80dB
Crosstalk rejection >72dB@1kHz;-20dB input
POWER SUPPLY: 100-120 V AC, ~ 200-240 V AC, 50-60 Hz
Power consumption 6.5VA
Fuse 100-120 V AC: 630 mA (slow-blow)
200-240 V AC: 315 mA (slow-blow)
Mains connection Using External Power Supply 16Vac
PHYSICAL: Dimension 1 3/4“ (44.5 mm) * 19“ (482.6 mm) * 8 1/2“ (217 mm)
Net weight approx. 3.15 kg