Rolls GCi404 User Manual
LINEPHONO
INPUT INPUT
ground
INPUT
STEREO
pwr
GCi404
Audio Computer Interface
The GCi404 mixes a balanced XLR Microphone signal with a 1/4 Instrument signal
and a group of stereo Line Input signals. The Microphone input has +12 volt phantom
power, a variable Level control from no signal to +55 dB of gain, and a Balance control. The Instrument input has a Level control variable from no signal to +30 dB. The
Line input group features three types of inputs; stereo RCA, stereo 1/8, and a stereo
Phono preamp with grounding post and built-in RIAA equalization. These signals are
mixed at the Line Level control.
LEVEL
on off
DUCKING
A ducking feature has been included in the GCi404 which, when engaged and a signal
is present at the microphone will duck the remaining input signals under the mic
signal. The ducking controls are located on the rear panel and include Depth and
Release Time controls. The Depth control adjusts the level of signal reduction by the
ducker, the Release control varies the amount of time taken for the program material to
Interface
INSTRUMENT
LEVEL INPUT
return to its previous level.
Audio - Computer
The GCi404 requires 12VDC; a Rolls PS27 power supply is included, or the unit may
BAL
L R
be powered by a computers internal drive power cable.
GCi 404
A CD input has been included on the rear panel for connection to the computers CD
on off
PHAN PWR
drive.
Outputs on the unit are stereo RCA and 1/8 as well as a 4-pin header to connect to a
MICROPHONE
INPUT LEVEL
sound card.
Uses for the GCi404 include commercial audio production, produce your own commercial on your computer, phonograph record to cd recording, etc.
FEATURES:
Microphone input with phantom power
Instrument input
RCA Line Input, Stereo 1/8" Line Input, RCA Phono Input with Ground post and RIAA equalization.
Individual Level controls for Mic, Instrument and Line Inputs
Automatic "Ducking" or talkover feature for Mic Input
Stereo RCA, 1/8" TRS stereo, or 4-pin header connector Outputs
SPECIFICATIONS
MIC INPUT
Input Impedance: 10K 9 bal, unbal.
Max Input Level:
Max Gain: 60 dB/XLR, 54 dB 1/4"
EIN: -108 dB max.
THD: <.01%
POWER 12 VDC
+4 dBV XLR bal, +10 dBV unbal.
DUCKING
DEPTH REL
+12 +5
Phantom Power: +21 Volts, 6 mA
LINE INPUTS
Input Connectors: RCA, 1/8" TRS Stereo
Input Sensitivity:
Input Capacitance: 5pf + cable capacitance
Input Impedance: 50k 9
Output Impedance: 100 9
Max Output Level: >10dB @ 1kHz at at 1% dist.
LINE
OUTPUT
R gnd L
30 dB gain @ 1kHz, 47kW Input Z
STEREO
OUTPUT
LINE
OUTPUT
CD
INPUT
R gnd L
Frequency Response:+ / - 1.5dB 100 - 10K Hz
(Conforms to RIAA Equalization)
THD: .02% @ 1KHz
S/N Ratio:>80 dB unweighted
INSTRUMENT INPUT
Input Impedance: 50k 9
Max Gain: 30dB
Output Connectors: RCA, 1/8" TRS
Stereo, 4-pin hdr.
Dimensions: 1.7"H x 5.9" W x 3.7" D
Weight:1 lb.
Power: 12VDC (Rolls PS27 Incl.)
Salt Lake City, UT
info@rolls.com
www.rolls.com
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