The RM-6 is Latvian microphone designer Artur Fischer's new flagship ribbon mic. The RM-6 achieves exceptional clarity and detail while maintaining the warmth and musicality that ribbons are known for. The RM-6's 1.2 micron ribbon is hand tuned and paired with a custom transformer for the lowest distortion and greatest presence.

Please read Artur's design notes for more details and check out the audio samples to hear the RM-6 for yourself.

To purchase the RM-6 outside of the US and Canada, please visit the DIY Audio Components Store.

Features:

• RE-323 ribbon transducer made of 1.2µm Japanese aluminum foil and neodymium magnets
• Custom RTP-28 toroidal output transformer
• Microphone body machined in Latvia of hand-selected stainless steel and matte polished for Bumblebee Pro's signature finish
• Custom XLR recepticle with gold-plated pins for decades of reliability

DIY Friendly

The RM-6 kit is accompanied by photo, step-by-step assembly instructions. It's a great kit for beginners, as the ribbon motor comes pre-assembled and there are six solder joints to complete. The required tools are a soldering iron, some solder, and a hex wrench (Allen Key) set.

Kit Includes:

A shock mount is not included. The SM-28 is sold separately here.

• RE-323 ribbon transducer (pre-assembled)
• RTP-28 transformer
• Stainless steel microphone body and mounting hardware
• XLR insert with gold-plated pins

What is the difference between the RM-5 and RM-6 DIY Ribbon Mic kits?

The RM-5 and RM-6 are two different designs, they just share the same type of body. The main differences are:

• RM-5 is a big ribbon mic with a 2″ ribbon; RM-6 is a small ribbon mic with a 1″ ribbon
• As is typical for shorter ribbons; RM-6 has less distortion and sounds more "natural"
• RM-6 has a slightly flatter frequency response than the RM-5
• RM-6 has significantly higher output signal level, at least +3dB higher than RM-5
• RM-6 has much lower magnetic flux leakage; there is practically no attraction between two microphones standing side by side
• RM-6 motor comes with a 1.2u ribbon, while the RM-5 motor comes with a 2.5u ribbon
• RM-6 comes with RTX-28 toroidal transformer optimized for thinner foil gauges

Hear a pair of RM-6s in a Blumlein setup below. Check out more audio samples under the "Audio" tab above.

Audio

The instruments (and vocals) in these videos were recorded using RM-6 Ribbon Microphones in Blumlein setup. Switch to HD video for higher audio quality.

Design Notes

Specs

• Acoustic principle: pressure-gradient
• Polar pattern: bi-directional / figure-eight
• Circuit type: passive
• Recommended load impedance: > 2000 Ohms
• Frequency response: 35 - 14.000 Hz approx.
• Output connector: 3-pin male XLR
• Dimensions: D 1.10" (28 mm), L 7.68" (195 mm)

Docs

• Assembly Manual (Same as RM-5)
• Getting Started With DIY