INTRODUCTION

Thank you for your purchase of the HA43Pro Reference Head- phone Amplifier. The HA43Pro drives up to four pairs of stereo headphones for high qualituy audio monitoring. The unit is intended for sound reinforcement, studio, choir, install, and other applications where a smaller size is desired without sacrificing audio quality.

SPECIFICATIONS

Input Impedance: 100k Ohms unbalanced

Max Input Level: +14 dBV

Input Connectors: TRS Stereo 1/4” phone, Dual RCA

Outputs: 4 TRS Stereo 1/4”, 4 TRS Stereo 1/8” (3.5mm)

Output Impedance: 51 Ohms each output

Max Gain: 20 dB/Channel

S/N Ratio: >90 dB

THD: < .008%

IMD (SMPTE): <.008%

Power: 12 VDC (Rolls Model PS27)

Weight: 1 lb (.45 kg)

Size: 4.15 x 3.45 x 1.16 (W x H x D)

DESCRIPTION

INPUTS: 1/4” Stereo TRS jack, and Dual RCA jacks for connec- tionto the stereo line-level signals to be monitored.

12 VDC PWR: Connects to the Rolls PS27 12 VDC (outside of the barrell positive) adapter.

CHANNEL LEVELS: Sliders 1 - 4 adjusts the level of the indicated channel.

OUTPUTS 1 - 4: 1/4” and 1/8” (3.5mm) TRS stereo jacks for con- nection to headphones or earphones.

WARRANTY INFO

Please visit our website, www.rolls.com, for the Rolls 1 Year War- ranty information and registration.

SCHEMATIC

.amplification headphone loud clean, of channels four need you anywhere ... Broadcast - School - Studio -

Amp Headhone Channel 4 Pro HA43

Amp Headphone Studio .Ch-4

Pro HA43

HA43 Pro

4-Channel Studio Reference

Headphone Amplifier

The HA43 Pro is a full frequency response four channel headphone monitoring device designed for the recording studio, or other professional applications like listening rooms and monitoring stations. Each output boasts a whopping 20 dB of clean channel gain.

Stereo 1/4” and Dual RCA Inputs

Slider Volume controls

AC adapter included

Full frequency response

Lots of output level.... it’s loud!

Rolls Corporation

Salt Lake City, UT

9/06

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Rolls specifications Pro HA43, HA43 Pro Channel Studio Reference Headphone Amplifier, Specifications, Description

HA43 specifications

The Rolls HA43 is a high-performance aircraft engine designed for advanced aviation applications, blending efficiency and power suitable for various aircraft types. Recognized for its reliability and innovative technologies, the HA43 represents a significant advancement in aviation engineering.

One of the main features of the Rolls HA43 is its powerful performance, delivering a remarkable thrust-to-weight ratio. This is achieved through its cutting-edge design, incorporating a high bypass ratio turbofan configuration. This design not only enhances fuel efficiency but also significantly reduces noise levels, making the HA43 compliant with modern environmental standards. The engine’s aerodynamic efficiency is further improved by utilizing advanced computational fluid dynamics (CFD) techniques, allowing for optimal airflow and reduced drag.

The HA43 also showcases several technological advancements that set it apart in the competitive market. A notable technology is the implementation of advanced materials, such as ceramic matrix composites and lightweight titanium alloys. These materials contribute to the engine's overall weight reduction while maintaining structural integrity and performance under high-stress conditions. The use of additive manufacturing techniques is another breakthrough feature, enabling complex geometries that traditional manufacturing processes cannot achieve. This results in reduced component weight and increased durability.

In terms of characteristics, the HA43 is engineered for adaptability across multiple aircraft platforms, from regional jets to business aviation. The engine supports a wide operating envelope, ensuring optimal performance whether at takeoff, cruise, or landing. Its modular design allows for easier maintenance and quicker turnaround times, reducing the overall lifecycle costs for operators.

Moreover, the HA43 is equipped with state-of-the-art digital control systems that enhance performance management and monitoring. These systems provide real-time data to pilots and engineers, enabling proactive maintenance and ensuring the engine operates at peak efficiency.

In summary, the Rolls HA43 combines superior performance, advanced materials, and innovative technologies to meet the demands of modern aviation. Its ability to deliver high thrust while maintaining fuel efficiency and environmental compliance makes it a prime choice for aircraft manufacturers and operators alike. The HA43 is not just an engine; it is a significant leap forward in aerospace propulsion technology.