Midas MICROPHONE PREAMPLIFIER 502 User Manual

1. Introduktion

The Midas MICROPHONE PREAMPLIFIER 502 is a high-performance, compact 500 Series premium microphone/line preamplifier. It incorporates award-winning Midas amplifier technology, enhanced with quad discrete ultra low noise input transistors, delivering exceptional audio fidelity.

This module features the legendary Midas input, allowing signal levels up to +24 dBu without the need for a pad, while maintaining its much-loved soft clipping characteristic. It also includes classic Midas XL4 swept low and high pass filters with independent selection switches, providing precise tonal shaping. A switchable twin aux balanced output offers mic/line splitter capability when installed in compatible Midas L6 or L10 racks.

Figur 1.1: Forside view of the Midas MICROPHONE PREAMPLIFIER 502, highlighting its input, gain, filter, and output controls.

2. Vigtige sikkerhedsinstruktioner

Please read these instructions carefully before operating your Midas MICROPHONE PREAMPLIFIER 502. Keep this manual for future reference.

• Udsæt ikke dette apparat for regn eller fugt.
• Bloker ikke ventilationsåbninger. Installer i overensstemmelse med producentens anvisninger.
• Må ikke installeres i nærheden af ​​varmekilder såsom radiatorer, varmeapparater, komfurer eller andre apparater (inklusive ampløftere), der producerer varme.
• Brug kun tilbehør/tilbehør specificeret af producenten.
• Overlad al service til kvalificeret servicepersonale. Service er påkrævet, når apparatet er blevet beskadiget på nogen måde, såsom strømforsyningsledning eller stik er beskadiget, væske er blevet spildt, eller genstande er faldet ind i apparatet, apparatet har været udsat for regn eller fugt, ikke fungerer normalt , eller er blevet droppet.
• This product is designed for professional audio applications and should be installed by qualified personnel.

3. Hvad er der i æsken

Upon unpacking your Midas MICROPHONE PREAMPLIFIER 502, please ensure all components are present and in good condition:

• Midas MICROPHONE PREAMPLIFIER 502 module
• Quick Start Guide / Sikkerhedsoplysninger
• Garanti registreringskort

Hvis nogen dele mangler eller er beskadiget, bedes du straks kontakte din forhandler.

4. Opsætning

The Midas MICROPHONE PREAMPLIFIER 502 is a 500 Series module designed to be installed into a compatible 500 Series rack or chassis (e.g., Midas L6 or L10 racks).

4.1 Installation into a 500 Series Rack

1. Ensure your 500 Series rack is powered off and disconnected from the mains supply.
2. Carefully align the edge connector of the 502 module with an available slot in your 500 Series rack.
3. Gently but firmly push the module into the slot until it is fully seated. Do not force the module.
4. Secure the module to the rack using the provided screws (typically two per module) through the faceplate.
5. Once all modules are installed, reconnect your 500 Series rack to the mains supply and power it on.

Figur 4.1: Vinklet view of the Midas MICROPHONE PREAMPLIFIER 502, illustrating its form factor for 500 Series rack installation.

4.2 Lydforbindelser

The 502 module receives its input and sends its output via the 500 Series rack's backplane connections. Refer to your 500 Series rack's manual for specific input/output patching details.

• Microphone/Line Input: Connect your microphone or line-level source to the corresponding input on your 500 Series rack's rear panel.
• Produktion: Connect the output of your 500 Series rack to your mixing console, audio interface, or other processing equipment.
• Aux Output (if applicable): If using a Midas L6 or L10 rack, the switchable twin aux balanced output provides additional routing flexibility.

5. Operating the Midas 502

The Midas 502 offers intuitive controls for precise microphone and line-level signal conditioning.

5.1 Betjeningselementer på frontpanelet

• INPUT (Rotary Knob): Adjusts the input level of the signal. The meter above indicates the input signal level.
• GAIN (Rotary Knob): Styrer mængden af amplification applied to the input signal.
• LOW PASS (Rotary Knob): Swept low pass filter control, allowing you to cut high frequencies. Range: 3 kHz to 15 kHz.
• HIGH PASS (Rotary Knob): Swept high pass filter control, allowing you to cut low frequencies. Range: 10 Hz to 400 Hz.
• TRIM (Rotary Knob): Fine-tunes the output level of the preamplifier. The meter above indicates the output signal level.
• 48V (Button): Engages +48V phantom power for condenser microphones. An indicator light illuminates when active.
• IN (Button - Phase): Inverts the phase of the input signal (180 degrees). An indicator light illuminates when active.
• IN (Button - Filter Bypass): Bypasses the low and high pass filters. An indicator light illuminates when active.
• TX (Button): Activates the transformer output, providing a distinct sonic character. An indicator light illuminates when active.
• Mic/Line (Switch): Selects between microphone and line-level input impedance and gain staging.

Figur 5.1: Detaljeret view of the Midas MICROPHONE PREAMPLIFIER 502 front panel controls.

5.2 Basic Operation Workflow

1. Connect your microphone or line source to the appropriate input on your 500 Series rack.
2. Indstil Mic/Line switch according to your source.
3. If using a condenser microphone, engage the 48V fantomkraft.
4. Start med GEVINST og INPUT knobs at their minimum settings.
5. Øg gradvist GEVINST until you achieve a healthy signal level on the input meter, avoiding clipping.
6. Juster LAV PASS og HØJ PASS filters as needed to shape the tone and remove unwanted frequencies.
7. Brug IN (Phase) button if phase correction is required.
8. Engager TX button for transformer coloration if desired.
9. Brug TRIM knob to fine-tune the output level to your next device in the signal chain.

6. Vedligeholdelse

The Midas MICROPHONE PREAMPLIFIER 502 is designed for reliable operation with minimal maintenance.

• Rensning: Brug en blød, tør klud til at rengøre enhedens yderside. Brug ikke slibende rengøringsmidler eller opløsningsmidler.
• Ventilation: Ensure that the ventilation slots on your 500 Series rack are not obstructed to prevent overheating.
• Opbevaring: When not in use for extended periods, store the module in a cool, dry place, ideally within its original packaging or a protective case.

7. Fejlfinding

If you encounter issues with your Midas MICROPHONE PREAMPLIFIER 502, refer to the following common troubleshooting steps:

If the problem persists after trying these steps, please contact Midas customer support or an authorized service center.

8. Specifikationer

Figur 8.1: Bagside view of the Midas MICROPHONE PREAMPLIFIER 502, displaying manufacturing and serial information.

9. Garanti og support

Midas products are built to the highest standards and come with a limited warranty. Please refer to the warranty card included with your product or visit the official Midas webhjemmeside for detaljerede garantivilkår.

For technical support, service, or spare parts, please contact your authorized Midas dealer or visit the Midas support page online. When contacting support, please have your product model number (MICROPHONE PREAMPLIFIER 502) and serial number ready.

Official Midas Webwebsted: www.midasconsoles.com