Rolls Audio Computer Interface GCi404 用户手册

FRONT PANEL

MICROPHONE

 

INPUT:   Balanced XLR 

jack for connection to low imped-

ance dynamic or condenser micro-

phone.

 

LEVEL:  Adjusts the amount of signal in the microphone preamp.

 

PHANTOM PWR: Header connector - connects the 12VDC phantom    

 

power for the XLR Microphone Input.

 

BAL:  

Varies the relative amount of microphone signal sent to the Right  

 

 

and Left Outputs.

INSTRUMENT

 

LEVEL: Adjusts the amount of signal in the instrument circuitry.

 

INPUT: 1/4” unbalanced jack for connection to instruments such as  

   

 

guitars, keyboards, etc.

PHONO/LINE

 

LEVEL: Adjusts the level of all deviced connected to the Phono or Line  

   

 

Inputs.

 

INPUT (Phono): Two RCA jacks for connection specifically to the output of  

 

 

a phono turntable.

 

INPUT (Line): Two RCA jacks for connection to line or consumer product  

 

 

outputs such as a CD or cassette player.

 

STEREO INPUT: 1/8” (3.5mm) TRS stereo jack for connection to a stereo line    

source such as a portable CD player or MP3 player.

 

GROUND: For connection to the grounding cable of a phono tuner.

     

DUCKING: Header connector - connects the Ducking function.
PWR: Indicates the GCi404 is properly connected to a power source.

REAR PANEL

POWER: 12VDC, 150mA. 2.1 x 

5.5mm barrel jack and header port 

- for connection to the Rolls PS27 AC 

adapter, or to the computer’s 3 1/2 

inch floppy drive power cable.

DUCKING

 

DEPTH: Adjusts the amount of LINE signal allowed to pass to the Outputs  

 

when ducking is occuring.

 

RELEASE: The amount of time taken for the ducked LINE signal to return  

 

to its normal level after the sigal at the Mic Input stops.

CD INPUT Port: 4-pin header for connecting to a CD rom output port. A CD Rom audio 

cable is required.

LINE OUTPUTS:

 

STEREO OUTPUT: (1/8” (3.5mm) jack)

 

LINE OUTPUT (RCA): 

 

LINE OUTPUT (Header Port): 

Each of these outputs contain the Right and Left output signals.

MIC INPUT
Input Impedance: 

10K Ohms bal, unbal.

Max Input Level: 

+4 dBV XLR bal, +10 dBV unbal.

Max Gain: 

 

60 dB/XLR, 54 dB 1/4”

EIN: 

 

 

-108 dB max.

THD:   

 

<.01%

Phantom Power:  

+12 Volts, 6 mA

INSTRUMENT INPUT
Input Impedance:  

50k Ohms

Max Gain: 

 

30dB

LINE INPUTS
Input Connectors:  

RCA, 1/8” TRS Stereo

Input Sensitivity: 

30 dB gain @ 1kHz, 47k Ohms Input Z

Input Impedance:  

50k Ohms

PHONO PREAMP
Input Impedance: 

50k Ohms

Equalization:   

RIAA, +/- 2dB

Ref. Gain: 

 

+20 dB @ 1 kHz

LINE OUTPUTS
Output Impedance: 

100 Ohms

Max Output Level: 

+12 dB

Frequency Response:  + / - 1.5dB 15 Hz - 30 kHz 

 

THD:    

 

.02% @ 1KHz

S/N Ratio: 

 

>80 dB unweighted

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.) 

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