WARNING

An equilateral triangle enclosing a lightening flash/arrowhead symbol is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure which may be of sufficient magnitude to constitute a risk of electric shock.

ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR

An equilateral triangle enclosing an exclamation point is intended to alert the user to the presence of important operating and service instructions in the literature enclosed with this unit.

IMPORTANT SAFETY INSTRUCTIONS

When using this electronic device, basic precautions should always be taken, including the following:

1.Read all instructions before using the product.

2.Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet basement, or near a swimming pool, etc.).

3.This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling.

4.This product, in combination with headphones or speakers, may be capable of producing sound levels that could cause permanent hearing loss. Do not operate for a long period of time at a high volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult an audiologist.

5.The product should be positioned so that proper ventilation is maintained.

6.The product should be located away from heat sources such as radiators, heat vents, or other devices (including amplifiers) that produce heat.

7.The product should be connected to a power supply only of the type described in the operating instructions or as marked on the product. Replace the fuse only with one of the specified type, size, and correct rating.

8.The power supply cord should: (1) be undamaged, (2) never share an outlet or extension cord with other devices so that the outlet’s or extension cord’s power rating is exceeded, and (3) never be left plugged into the outlet when not being used for a long period of time.

9.Care should be taken so that objects do not fall into, and liquids are not spilled through, the enclosure’s openings.

10.The product should be serviced by qualified service personnel if:

A.The power supply cord or the plug has been damaged.

B.Objects have fallen into, or liquid has been spilled onto the product.

C.The product has been exposed to rain.

D.The product does not appear to operate normally or exhibits a marked change in performance.

E.The product has been dropped, or the enclosure damaged.

11.Do not attempt to service the product beyond what is described in the user maintenance instructions. All other servicing should be referred to qualified service personnel.

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Nady Systems HPA-4 manual Important Safety Instructions
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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.
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