INSTALLATION

To ensure years of enjoyment from your NADY AUDIO HPA-4, please read and understand this manual thoroughly before using the unit.

INSPECTION

Your HPA-4 was carefully packed at the factory in packaging designed to protect the units in shipment. Before installing and using your unit, carefully examine the packaging and all contents for any signs of physical damage that may have occurred in transit.

(Note: Nady Systems is not responsible for shipping damage. If the unit is damaged, do not return to us, but notify your dealer and the shipping company immediately to make a claim. Such claims must be made by the consignee in a timely manner.)

CONTENTS:

Instruction manual

HPA-4 (verify that the unit’s serial number is same as shown on shipping carton)

AC Power cord

Warranty Card

RACK MOUNTING

The HPA-4 fits into one standard 19" rack unit of space (1 3/4"). Parts of the unit can become very warm during use. This is normal during operation. Care should be taken to ensure that there is enough space around the unit for cooling (at least 12” or 30cm). Do not place the HPA-4 on high temperature devices such as power amplifiers, etc., or the unit may overheat in operation. Also, do not place the unit on speakers as this may cause them to move and/or fall due to speaker vibrations.

Although the unit’s chassis is shielded against radio frequency (RF) and electromagnetic interference (EMI), extremely high fields of RF and EMI should be avoided.

POWER CONNECTION

The HPA-4 has an internal power supply and is designed to operate from an external AC source. Power requirements for electrical equipment differ from area to area. Be sure to confirm that the voltage selected by the voltage selector switch on the back panel is proper for your area (120VAC/60 Hz or 230VAC/50Hz) per the information below:

Europe (except UK): 230V, 50Hz

UK and Australia: 240V, 50Hz

USA and Canada: 120V, 60 Hz

For other areas, please check with local authorities.

When ready to operate, plug the AC cord into the power source. Make sure that the unit is turned off before connecting to the AC power source to avoid possible loud transients which can damage your speakers or your ears, especially when monitoring with headphones.

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Nady Systems HPA-4 manual Installation, Inspection, Contents, Rack Mounting, Power Connection

HPA-4 specifications

Nady Systems has long been recognized as a leader in innovative audio solutions, and the HPA-4 is no exception. This powerful headphone amplifier is engineered to deliver superior sound quality and versatility, making it an ideal choice for both amateur and professional audio enthusiasts.

One of the standout features of the HPA-4 is its ability to handle multiple audio sources simultaneously. With four separate headphone outputs, this amplifier allows multiple users to listen in without compromising on sound quality. Each output has its volume control, providing users with individual adjustment options to suit their preferences. This is particularly beneficial in studio settings, classrooms, or when collaborating with other musicians.

The HPA-4 utilizes high-quality components to ensure clear and accurate audio reproduction. Its low-distortion circuitry provides a clean signal path, delivering enhanced dynamics and frequency response. This means that whether you are mixing tracks, listening to music, or gaming, the audio experience remains faithful to the source material.

Another remarkable characteristic of the HPA-4 is its compact and rugged design. The unit is built with durability in mind, making it perfect for both studio and mobile use. Its lightweight yet sturdy chassis allows for easy transport without compromising on performance. Users can confidently take the HPA-4 to live events, studios, or practice rooms.

The HPA-4 also includes advanced technology features such as a dedicated 1/4-inch and a 1/8-inch headphone output. This caters to a wide range of headphone types, accommodating both professional-grade models as well as consumer-friendly options. Additionally, it offers a direct input for connecting to mixers or audio interfaces, ensuring compatibility with various audio setups.

For users who demand flexibility, the HPA-4 comes equipped with a power supply, as well as battery operation options. This versatility means you can use it as needed, whether you’re in a studio, on location, or simply enjoying music at home.

In summary, the Nady Systems HPA-4 headphone amplifier stands out with its multiple headphone outputs, high-quality audio processing, robust design, and versatile connectivity options. It is an exceptional addition to any audio toolkit, serving both professional and casual users alike while ensuring an unparalleled listening experience. Whether for personal enjoyment or professional applications, the HPA-4 delivers on multiple fronts, solidifying its place as a staple in modern audio technology.