ART HVA Series Switching Power Professional Amplifier

Introduction

The ART HVA Series 1 and 4 are class-D installation amplifiers designed for 70V/100V line installations, selectable via dip-switches. Each channel features independent gain control and LED indicators for signal, clip, and protection status. Input and output connections are facilitated by Euroblock connectors. These amplifiers are housed in a 1U rack 19-inch chassis, making them suitable for various installation environments and leveraging their multichannel design.

Features

• High current switching power for high output with low noise and distortion.
• Short circuit, thermal, and power on/off muting protection.
• Built-in limiter.
• Euroblock input and output connectors.
• Front-mounted gain controls for easy access.
• LED indicators for Signal, Clip, Protect, and Power status.
• Remote disabling of amplifier outputs.
• Priority input for remote test/alarm signals.
• Remote Failure Status indicator.
• Available as 2-channel (HVA1) or 4-channel (HVA4) models.
• Supports 70V/100V line operation.
• Power output: 2x150W (HVA1) / 4x300W (HVA4) at 100V; 2x135W (HVA1) / 4x270W (HVA4) at 70V.
• 1U rack 19-inch size.
• Class-D switching power amplifier technology.

Important Safety Instructions

Read and follow all safety instructions before operating the equipment.

General Warnings:

• ⚠️ CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN. This symbol indicates the presence of uninsulated dangerous voltage inside the enclosure, which may pose a shock hazard.
• This symbol indicates important operating and maintenance instructions. Please read the accompanying manual carefully.
• Retain these safety and operating instructions for future reference.
• Heed all warnings printed on the equipment and in this guide.
• Follow all operating instructions.

Operational Safety:

• Do Not Open: No user-serviceable parts inside. Refer all servicing to qualified technical personnel.
• Power Sources: Connect only to mains power matching the type marked on the rear panel. Ensure a good ground connection.
• Power Cord: Use the provided sealed mains plug appropriate for your local supply. Route the cord to prevent it from being walked on, stretched, or pinched.
• Grounding: Do not defeat the grounding or polarization features of the power cord plug. Do not remove or tamper with the ground connection.
• Ventilation: Do not obstruct ventilation slots or operate in areas where airflow is impeded. Ensure adequate ventilation, especially when installed in racks or furniture.
• Moisture: To reduce the risk of fire or electrical shock, do not expose the unit to rain, moisture, or use in damp/wet conditions. Do not place liquid containers on the unit.
• Heat: Avoid locations near excessive heat or direct sunlight. Keep away from heat-producing equipment like other power supplies or amplifiers.
• Environment: Protect from excessive dirt, dust, heat, and vibration during operation and storage. Avoid tobacco ash, spills, and smoke.
• Handling: Prevent damage to controls and cosmetics by avoiding rough handling and excessive vibration. Use adequate padding for transit. Lift and move the unit with care to avoid injury or damage.
• Servicing: Switch off and unplug the unit immediately if exposed to moisture, spills, dropped objects, damaged power cord/plug, or if smoke/odor/noise is detected. Refer servicing to qualified personnel.
• Installation: Install the unit according to the instructions in this user manual.

Technical Specifications

Front Panel

The front panel provides access to essential controls and indicators:

1. Power Switch: Toggles the unit's main power ON/OFF.
2. Level Control: Adjusts the volume level for each channel.
3. Power/Protect LED: Indicates the unit's status. Green for normal operation, Red for protect mode.
4. Signal LED: Illuminates green when a signal is present on the respective channel.
5. Protection LED: Normally off. Turns Red if the unit enters thermal protection, disconnecting the speaker load. Normal operation resumes once the thermal temperature is reduced.
6. Clip LED: Illuminates Red when the input signal level is too high.
7. Air Intake Vents: Features a variable speed internal cooling fan. Keep these vents clear for proper cooling.

Diagram Description: The front panel diagram shows the layout of the HVA1 and HVA4 amplifiers, illustrating the position of the power switch, level controls, and various LEDs (Power/Protect, Signal, Clip) for each channel.

Rear Panel

The rear panel contains connection points and configuration switches:

1. AC Input: Mains power input. The supplied power cord is determined by the country of operation.
2. Euroblock Input: For balanced signal input (+), unbalanced signal input, and signal ground (GND). Includes terminals for Fail (Failure Status Output), DIS (Disable Amplifier Input), and PRI (Input Priority Control).
3. Euroblock Output: For connecting speakers using Euroblock connectors.
4. Operation Mode Switch: Dip-switches allow selection of 70V or 100V operation mode for each channel.
5. Exhaust Vents: Allow air to flow through the unit for cooling. Do not block these vents.

Diagram Description: The rear panel diagram illustrates the placement of the AC input, Euroblock input/output connectors, operation mode switches, and speaker outputs. It shows connections for channels A, B, C, and D, along with terminals for Fail, DIS, PRI, and GND.

Service

In the event that your unit requires service, follow these steps:

1. Verify the unit is the cause of the problem. Check power, cable connections, and cable condition. Consult your dealer for troubleshooting assistance.
2. If the ART unit is believed to be at fault, visit www.artproaudio.com.
3. Navigate to "Support" and select "Return Authorization Request" to obtain an RA number.
4. When returning the unit for service, pack it securely in its original carton or a suitable substitute. Place the RA number clearly on the outside of the shipping box and include your return shipping address.
5. Include a note with the RA number, your contact information (including a daytime phone number and return shipping address, as P.O. boxes cannot be used), and a description of the problem. Attach this note to the top of the unit. A copy of the purchase receipt is also required.

For Reference:

Date of purchase: __________________________________

Purchased from: __________________________________

Serial Number: __________________________________

Warranty Information

Limited Warranty (USA only):

Applied Research & Technology (ART) warrants this product and its components against defects in workmanship and materials for a period of three years from the date of purchase. ART will, at its option, repair or replace defective products or component parts free of charge upon prepaid delivery to the factory service department or an authorized service center, accompanied by a valid sales receipt as proof of purchase date.

Online Registration:

Register your product online at www.artproaudio.com under "Support" > "Product Registration" for prompt warranty service.

Exclusions:

This warranty does not cover misuse, abuse, unauthorized alterations, or repairs. It is void if the serial number is altered, defaced, or removed. ART reserves the right to make design changes without obligation to apply them to previously manufactured products. ART is not liable for consequential damages, including loss of use. Some states may have different limitations on incidental or consequential damages.

For units purchased outside the United States, service is provided by an authorized distributor of Applied Research & Technology.

Applications

The HVA Series amplifiers, with their 4-channel/2-channel design, are versatile for multi-zone audio distribution. They can be configured to serve up to four or two zones, each with different audio sources, or to use the same audio source across all zones.

Diagram Description: The application diagrams illustrate connection examples for 100V line loudspeakers. One diagram shows four zones (ZONE 1, ZONE 2, ZONE 3, ZONE 4) each connected to a channel (CHA, CHB, CHC, CHD) with 100V line loudspeakers connected in parallel, up to 150W/300W load per zone. Another diagram shows a similar setup for two zones.