Rolls RP503 用户手册

When the RP503 has been properly connected, ensure the power switch is on 

and the Power LED is lit.

MIC PREAMP SETTINGS

For condenser microphones, press in the Phantom Power switch. Press the PAD 

switch in if you’re sending a line level (+4dB) signal into the RP503. This helps 

prevent overload. Send a signal to the RP503 by checking the microphone or 

instrument connected to the INPUT. Adjust the GAIN control while sending the 

signal, when the CLIP led lights slightly, back the GAIN control off (counterclock-

wise) one or two marks to achieve the proper level of incoming signal.

COMPRESSOR SETTINGS

Press in the IN/OUT switch to engage the compressor. Begin by setting the 

THRESHOLD control high (around 3 o’clock) and the RATIO low (fully counter-

clockwise). This is a very low compression setting. To increase the amount of 

compression, lower the THRESHOLD and increase the RATIO until the desired 

amount is achieved.

USING THE SIDE CHAIN

To use the SIDE CHAIN to directly access the compressor circuitry, you’ll need 

an Insert cable like the one shown above. The Tip-Ring-Sleeve stereo end plugs 

into the RP503 SIDE CHAIN jack. The 1/4” SEND plug connects to the Input 

of a signal processor such as an equalizer, the 1/4” RETURN plug connects to 

the signal processor Output. The signal in the SIDE CHAIN is not heard on the 

Output of the RP503, it only effects the action of the compressor. The higher the 

level of signal in the SIDE CHAIN, the more compression will occur.

EQUALIZER SETTINGS

Begin with all controls set at 0 or center detente position. This is the equivalent of 

a “bypass”.  Adjusting the LEVEL controls will increase or decrease the amount 

of the indicated frequency range. The MID FREQUENCY control adjusts the 

actual frequency that the MID LEVEL control will adjust.

USING THE PROCESSES TOGETHER

Increasing the Mic Preamp GAIN settings to the point where slight distortion 

occurs will effect the overall frequency content of the output signal. EQ adjuste-

ments may need to be made. 

Experiment with different settings until you’ve acheived the desired sound.

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REAR PANEL

120 VAC 50/60 Hz: 

OUTPUT: 1/4” unbalanced and XLR balanced output. Connect to an audio re-

corder line input or mixer line input. Note: Do not connect the RP503 XLR Output 

to a mixer’s Mic Input - it will overload that input.

SIDE CHAIN: 1/4” Tip-Ring-Sleeve Send\Return jack. Connect an Insert cable to 

this jack and to a signal processor or other device to alter the action of the RP503 

compressor.

INPUT: Balanced XLR and unbalanced 1/4” Input jacks. Connect balanced micro-

phones to the XLR input, and unbalanced instruments to the 1/4” input.

CONNECTION

Make sure the RP503 power cord is properly connected to a grounded AC outlet. 

Shown below are examples of how to connect the RP503 for use with a micro-

phone or instrument. Do not use both inputs at 

the same time.