Millennia HV-35 500 Series Microphone Preamplifier

1. Introduction

Thank you for choosing the Millennia HV-35 500 Series Microphone Preamplifier. This unit is designed to provide exceptional audio fidelity and versatility within the API 500 series format. It is engineered for professional audio applications, offering a clean, transparent gain stage for a wide range of microphones and instruments.

This manual provides essential information for the safe and efficient operation of your HV-35. Please read it thoroughly before installation and use, and retain it for future reference.

2. Safety Information

• Power: Ensure your 500 series rack provides stable and correct power specifications for the HV-35. Refer to your rack's manual for details.
• Environment: Operate the unit in a dry environment, away from direct sunlight, heat sources, and excessive dust. Avoid exposure to moisture or liquids.
• Servicing: Do not attempt to service this unit yourself. Refer all servicing to qualified service personnel. Opening the unit may void your warranty.
• Connections: Always power down your 500 series rack before inserting or removing the HV-35 module to prevent damage to the unit or the rack.
• Phantom Power: When using 48V phantom power, ensure your microphone is compatible. Disconnect phantom power before connecting or disconnecting condenser microphones to prevent damage.

3. Package Contents

Verify that your package contains the following items:

• Millennia HV-35 500 Series Microphone Preamplifier module
• This User Manual
• Warranty Registration Card (if applicable)

4. Product Overview

The Millennia HV-35 is a high-quality, single-channel microphone preamplifier designed for the 500 series format. It offers transparent amplification with a wide frequency response and low noise, suitable for critical recording applications.

4.1 Front Panel Controls and Indicators

Figure 1: Front view of the Millennia HV-35 module. This image shows the overall appearance of the unit. Specific controls are detailed below.

• GAIN Knob: Continuously variable control for adjusting the microphone preamplifier gain, up to +65dB.
• +10dB GAIN Boost Switch: Engages an additional 10dB of gain, primarily useful for low-output microphones like passive ribbon mics, increasing total gain to +75dB.
• INST Input (1/4" TRS): Front-panel instrument input for direct connection of high-impedance sources such as guitars or basses. This input bypasses the microphone input when a plug is inserted.
• 48V Phantom Power Switch: Activates +48V phantom power for condenser microphones. An LED indicator typically illuminates when engaged.
• PAD Switch (-15dB): Engages a 15dB input pad to attenuate hot input signals, preventing overload.
• HPF Switch (80Hz): Activates an 80Hz high-pass filter to reduce unwanted low-frequency rumble and noise.
• POLARITY Switch: Reverses the polarity (phase) of the input signal.

4.2 Rear Panel Connections (via 500 Series Rack)

The HV-35 connects to your audio system via the standard API 500 series rack. The rear panel connections are provided by the rack itself and typically include:

• XLR Microphone Input: Balanced input for connecting microphones.
• XLR Line Output: Balanced output for connecting to your audio interface, mixer, or other recording equipment.
• Power Connection: The module receives power directly from the 500 series rack.

5. Setup

1. Rack Installation: With your 500 series rack powered OFF, carefully slide the HV-35 module into an available slot. Ensure it is fully seated and secured with the mounting screws (if provided by your rack).
2. Microphone Connection: Connect your microphone to the XLR input on the rear of the 500 series rack corresponding to the HV-35 module.
3. Output Connection: Connect the XLR output from the HV-35 slot on your 500 series rack to an input on your audio interface, mixer, or recording device.
4. Instrument Connection (Optional): If using the front-panel instrument input, connect your instrument (e.g., guitar, bass) directly to the 1/4" TRS input on the HV-35. This will automatically bypass the rear XLR microphone input.
5. Power On: Once all connections are secure, power on your 500 series rack.

6. Operating Instructions

Follow these steps for optimal performance:

1. Initial Gain Setting: Start with the GAIN knob fully counter-clockwise (minimum gain).
2. Phantom Power: If using a condenser microphone, engage the 48V PHANTOM POWER switch. Wait a few seconds for the power to stabilize before proceeding.
3. PAD: If your microphone has a very high output or you are recording a very loud source, engage the -15dB PAD switch to prevent input clipping.
4. HPF: Engage the 80Hz HPF switch if you are experiencing unwanted low-frequency rumble, proximity effect, or stage noise.
5. Adjusting Gain: While monitoring your signal, slowly increase the GAIN knob until you reach a healthy recording level without clipping. The HV-35 is designed for transparency, so aim for a strong signal without distortion.
6. +10dB GAIN Boost: For very quiet sources or low-output microphones (like passive ribbon microphones), engage the +10dB GAIN Boost switch to achieve sufficient level.
7. Polarity: Use the POLARITY switch if you need to correct phase issues, especially when using multiple microphones on a single source.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use liquid cleaners or solvents, as they may damage the finish or internal components.
• Storage: When not in use for extended periods, store the HV-35 in a cool, dry place, ideally within its 500 series rack or in protective packaging.
• Inspection: Periodically inspect the module for any signs of damage or loose connections.

8. Troubleshooting

9. Specifications

Note: Specifications are subject to change without notice.

10. Warranty and Support

Millennia Media products are manufactured to the highest standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Millennia Media website. Keep your proof of purchase for warranty claims.

For technical support, service, or further inquiries, please contact Millennia Media customer support through their official website or authorized distributors. Do not attempt to repair the unit yourself, as this may void your warranty.

No official product videos were provided in the product data. If available, relevant instructional videos would be embedded here.