Meet the remote-controlled Stereo/M-S ribbon mic | SM Mastering

In the world of high-end studio recording, transient response, low-noise floor, and pristine phase coherency are the hallmarks of a mastering-grade capture. While ribbon microphones have long been celebrated for their smooth, natural high-end and lifelike depth, they historically suffer from low output levels and sensitivity to long cable runs. In this technical deep-dive, we meet the remote-controlled stereo/m-s ribbon mic that is redefining high-fidelity recording in the modern studio environment: the Hum Audio Devices RS-2.

For decades, engineers have had to balance the sonic beauty of ribbons with the practical limitations of passive ribbon designs. Hum Audio Devices has radically disrupted this paradigm by integrating custom-designed, discrete class-A preamplifiers directly inside the microphone body itself. For more expert analyses of high-end studio gear and mastering workflows, make sure to visit our comprehensive archive of SM Mastering Audio Articles.

Why We Need to Meet the Remote-Controlled Stereo/M-S Ribbon Mic

As we explore its architecture, we meet the remote-controlled stereo/m-s ribbon mic as a masterclass in custom CNC milling and strict physical tolerances. Precision engineered with tolerances of just 1.2 microns, the RS-2 houses a coincident pair of ribbons fixed at a 90-degree angle to one another. This mechanical configuration allows for two distinct, classic stereo setups. In Blumlein mode, the faces of the ribbons are rotated 45 degrees away from the sound source, capturing an exceptionally realistic stereo image with complete phase compatibility. With a smooth mechanical adjustment of the microphone head, the capsule alignment shifts perfectly into a Mid-Side (M-S) configuration, allowing engineers to control the stereo width of their recordings during the mixdown process.

While legendary brands like Neumann have defined classical studio standards with their exceptional condenser designs, Hum Audio Devices is carving out a new path with active ribbon topologies. By keeping the preamplifier circuitry inside the microphone body, the RS-2 minimizes the distance between the delicate ribbon motor and the initial gain stage. The signal generated by a ribbon element is incredibly minute; by amplification-at-source, the RS-2 completely avoids the high-frequency loss and electromagnetic interference typically introduced by long cable runs before the preamp.

Advanced Remote-Controlled Analog Technology

When you finally meet the remote-controlled stereo/m-s ribbon mic in a real tracking session, you quickly realize how much the built-in discrete preamplifiers clean up the delicate ribbon signal. But how does one adjust the gain of a microphone hanging fifteen feet in the air above an orchestra or drum kit? Hum Audio Devices solved this elegantly by designing an external, desktop-based remote control unit that communicates with the microphone via standard XLR cabling.

Instead of sending degradable analog control voltages over the line, the remote control utilizes an ingenious system of optocouplers. The gain section of the microphone’s internal preamplifier is controlled by photocells, ensuring complete electrical isolation between the control circuitry and the pure audio path. This means you can adjust input gain, low-cut filters, and polar behavior from the comfort of the control room sweet spot, without introducing a single hint of digital noise or zipper artifacts into your signal path.

Technical Specifications Table

Below is a technical overview of the Hum Audio Devices RS-2, showcasing its key features and performance metrics in demanding professional environments.

Practical Studio Workflow Tips

To get the best results when you meet the remote-controlled stereo/m-s ribbon mic, start by positioning it as a drum room microphone in Blumlein mode. The ultra-low noise floor allows you to capture the subtle room reflections and explosive transients of the kit without the typical hiss associated with passive ribbons paired with high-gain preamps. Here are several workflows to optimize your sessions:

• The Sweet Spot Finder: Use the remote control to sweep the gain while standing in the control room. This allows you to match the exact input impedance and level of your converter without having to run back and forth to the live room.
• Mid-Side Depth Management: Set the RS-2 to M-S mode for acoustic acoustic guitar sessions. Keep the mid mic centered and use the side mic to adjust the width in the analog realm or during mastering stages, providing maximum mono compatibility for broadcast formats.
• Orchestral Overheads: Since ribbon microphones have natural high-frequency roll-offs, they tame harsh violin overtones beautifully. Use the onboard low-cut filter to eliminate unwanted stage rumble directly at the microphone capsule before the preamplifier stage.

Conclusion

Ultimately, to meet the remote-controlled stereo/m-s ribbon mic is to understand where the future of high-end analog tracking is headed. By merging the sonic beauty of classic ribbon transducers with modern, opto-isolated remote control and active discrete electronics, Hum Audio Devices has delivered a game-changer for tracking and mastering engineers alike. It bridges the gap between vintage warmth and modern convenience, setting a new benchmark for what a premium ribbon microphone can achieve in the 21st century.

Frequently Asked Questions

Is the Hum Audio Devices RS-2 suitable for quiet acoustic instruments?

Yes, absolutely. Because the RS-2 features a built-in, custom Class-A discrete preamplifier located inches away from the ribbon capsule, it boasts an incredibly low self-noise floor. This makes it ideal for capturing quiet sources like classical acoustic guitars, solo strings, and subtle room ambiances without any audible hiss.

Do I need special cables to connect the remote control to the microphone?

No. One of the most brilliant aspects of the RS-2 system is that the remote-control unit communicates with the microphone using standard, readily available XLR microphone cables. The control signals are completely isolated from the audio path using internal optical technology, ensuring zero interference.

Can I use the RS-2 in both stereo Blumlein and M-S modes?

Yes. The microphone features a highly sophisticated, CNC-machined physical head joint that allows you to easily switch between a 90-degree coincident Blumlein configuration and a standard Mid-Side configuration. This physical versatility makes it one of the most flexible stereo ribbons ever built.

Written by SM Mastering

Official content on sound engineering, mixing, mastering, and advanced electronic production by SM Mastering.