DESCRIPTION CONT.

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.

OPERATION

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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Rolls RP503 owner manual Operation
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RP503 specifications

The Rolls-Royce RP503 is a powerful turbofan engine that has carved a niche for itself in the aviation industry thanks to its advanced technologies and exceptional performance characteristics. Built by Rolls-Royce, a leader in aerospace propulsion systems, the RP503 is designed for high-efficiency commercial aircraft applications and is known for offering a compelling mix of power, reliability, and environmental consideration.

One of the standout features of the RP503 is its advanced aerodynamics, which significantly enhance fuel efficiency. The engine incorporates an innovative wide-chord fan that allows for increased airflow while maintaining a lightweight structure. This design not only reduces drag but also optimizes overall engine performance, leading to lower fuel consumption when compared to older engine models.

The RP503 utilizes a three-shaft design that enhances its operational efficiency by maintaining optimal turbine speeds. This configuration enables the engine to deliver consistent thrust across a wide range of operating conditions. Additionally, the separation of high-pressure and low-pressure systems enhances performance while allowing for better management of thermal stresses, thus improving reliability and longevity.

Another critical aspect of the RP503 is its noise reduction technology. The engine features advanced sound-absorbing materials and structural innovations that contribute to quieter operation. This is particularly important in today’s regulatory environment, where noise pollution is a growing concern for many communities near airports.

Emphasizing environmental sustainability, the RP503 engine is designed with lower emissions in mind. The combustion chamber is engineered to achieve complete combustion, resulting in reduced nitrogen oxide emissions. This focus on greener technologies aligns with the aviation industry's broader goals of minimizing its ecological footprint.

In addition to these features, maintenance and serviceability are significant considerations in the design of the RP503. The engine incorporates easily accessible modules and components, facilitating quicker inspections and repairs. This aspect not only reduces downtime but also contributes to the overall cost-effectiveness of operating an aircraft powered by the RP503.

With its advanced design and cutting-edge technologies, the Rolls-Royce RP503 represents a significant advancement in turbofan engine capabilities, catering to the demands of modern aviation while prioritizing efficiency, reliability, and environmental responsibility.
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