Specifications, Description, Front Panel

SPECIFICATIONS

Input Impedance:	600 Ohms balanced
	50K Ohms unbalanced (1/4”)
Output Impedance:	50 Ohms TRS Balanced
Max Input Level:	-15 dBV XLR 600 Ohms
	+18 dBV 1/4”
Max Gain:	+65 dB
Max Output Level:	+22 dB
Frequency Response	20Hz - 25kHz +/-3dB
THD + Noise	<0.1% typical
Noise Floor	- 75 dB
Equalizer Boost/Cut:	+/- 15 dB
Equalizer settings:
Low shelf:	150 Hz
High shelf:	10 kHz
Mid freqencies:	300 Hz - 5 kHz, Q = 1
Compressor settings:
Threshold:	-30 dB to +20 dB
Ratio:	2:1 to 8:1
Indicators	Phantom Power LED, Clip LED, Power LED
	Analog VU Meter
Input/Output jacks	XLR balanced
	1/4” unbalanced
	1/4” TRS unbal. Side Chain
Dimensions	1.75” x 6” x 19”
	(90mm X 162mm X 482mm)
Weight	3.5 lbs. (1.75 Kg)
Power	120VAC (230VAC) 15VA

DESCRIPTION

FRONT PANEL

Mic Preamp Controls

PAD: Sets the level of the XLR input only. When in, the mic preamp has +30 dB of gain, when out the preamp is padded to 0 dB of gain.

PHASE REVERSE: When pressed in, the output signal will be 180 degrees out of phase with the input signal.

PHANTOM POWER: When pressed in, and the LED above this switch is lit, +48 volts of phantom power is applied to the XLR Mic input.

GAIN: Controls the amount of gain in the tube mic preamp circuit. This control adds from 0 dB to +30 dB of gain.

CLIP: LED for indicating clipping or possible distortion in the mic preamp circuits.

Compressor controls

IN/OUT: Switch for engaging the compressor circuits. The compressor is active when the switch is in.

THRESHOLD: Sets the point that the input signal must reach for compression to begin.

RATIO: This control sets the signal to compression ratio. This ratio relates to the amount of increase of input compared to output signal. Thus, at a 1:1 ratio, a 1 dB increase of input signal will result in a 1 dB increase of output signal. At 2:1, a 2 dB increase of input signal will result in only 1 dB increase of output signal. At 8:1, an 8 dB increase of input signal will result in a 1dB increase of output signal. GAIN REDUCTION: VU Meter indicating the amount of compression in dB.

NOTE: THIS METER DOES NOT INDICATE INPUT OR OUTPUT LEVEL.

Equalizer controls

LOW LEVEL: Adjusts level of low frequencies, from 20Hz to 150Hz.

MID LEVEL: Adjusts the level of mid frequencies, as selected by the MID FRE- QUENCY control. This sweepable filter has a Q or width of 1.

MID FREQUENCY: Selects the frequency to be boost/cut by the MID LEVEL control.

HIGH LEVEL: Adjusts the level of high frequencies, from 10kHz to 20kHz.

OUTPUT LEVEL: Adjusts the overall volume from the RP503 main outputs.

PWR LED: Indicates power is applied to the RP503.

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.