SubZero Compact Studio Headphone Amplifier

Introduction

The SubZero Compact Studio Headphone Amplifier (Model SZ-HPA4) is engineered for high-quality audio monitoring, allowing a single audio source to be distributed to multiple headphones. Its robust design ensures consistent signal integrity even when all four outputs are in use. Each channel features an independent level control, enabling individual users to set their preferred listening volume. An easily identifiable power switch with an LED indicator provides convenient operation. A power supply unit is included for immediate use.

Safety Information

• Read all instructions before operating the device.
• Do not expose this equipment to rain or moisture.
• Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
• Only use attachments/accessories specified by the manufacturer.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

Package Contents

• SubZero Compact Studio Headphone Amplifier (SZ-HPA4)
• Power Supply Unit (DC 12V 0.5A)

Product Overview

Front Panel

Figure 1: Front Panel of SZ-HPA4

This image displays the front of the SubZero SZ-HPA4 headphone amplifier. It features four silver rotary knobs for individual channel volume control, labeled 1 through 4. Below each knob is a corresponding 1/4" (6.35mm) stereo headphone output jack. On the right side, there is a black power button and a green LED power indicator.

1. Volume Knobs (1-4): Adjust the output volume for each individual headphone channel.
2. Headphone Outputs (1-4): 1/4" (6.35mm) stereo jacks for connecting headphones.
3. Power Button: Toggles the amplifier on or off.
4. Power LED: Illuminates green when the unit is powered on.

Rear Panel

Figure 2: Rear Panel of SZ-HPA4

This image shows the rear panel of the SubZero SZ-HPA4 headphone amplifier. On the left, there is a DC 12V 0.5A power input jack. On the right, there is a 1/4" (6.35mm) stereo audio input jack, labeled "INPUT".

1. DC 12V 0.5A Power Input: Connect the included power supply unit here.
2. INPUT: 1/4" (6.35mm) stereo jack for connecting your audio source (e.g., mixer, audio interface).

Setup

1. Ensure the amplifier's power button is in the "OFF" position.
2. Connect your audio source (e.g., mixer, audio interface, computer) to the INPUT jack on the rear panel using a 1/4" (6.35mm) stereo audio cable.
3. Connect the included DC 12V 0.5A power supply unit to the DC 12V 0.5A Power Input jack on the rear panel, then plug the power supply into a suitable wall outlet.
4. Connect your headphones to any of the four Headphone Outputs (1-4) on the front panel.

Operating Instructions

1. After completing the setup, press the Power Button on the front panel to turn the amplifier "ON". The Power LED will illuminate green.
2. Ensure your audio source is playing sound.
3. Adjust the individual Volume Knobs (1-4) for each connected headphone to achieve the desired listening level. Start with the volume low and gradually increase it to a comfortable level.
4. To turn off the amplifier, press the Power Button again. The Power LED will turn off.

Note: The amplifier distributes the input signal. It does not amplify the signal beyond the input level, but rather provides individual volume control for each output. Avoid setting individual channel volumes too high if the input signal is already strong, as this may lead to distortion.

Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or aerosol cleaners.
• Storage: When not in use for extended periods, store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
• Ventilation: Ensure the amplifier has adequate ventilation and is not placed in an enclosed space that could restrict airflow.

Troubleshooting

Specifications

Warranty & Support

The SubZero Compact Studio Headphone Amplifier (SZ-HPA4) comes with a 3-Year Warranty from the date of purchase, covering manufacturing defects. Please retain your proof of purchase for warranty claims.

For technical support, troubleshooting assistance, or warranty inquiries, please contact your retailer or visit the official SubZero website for contact information.