SKU: 91839762619

RM-6 Ribbon Microphone Kit

Sale price$157.50 Regular price$175.00
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Description

RM-6 Ribbon Microphone KitThe 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

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

RM-6 Ribbon Microphone is the result of all the experience and knowledge we have gained during the years of manufacturing and improving our parts and kits. The development process of RM-6 took nearly two years starting from the first sketches and ending with the units of the first prototype run.

The RM-6 Ribbon Mic Kit features precision machined and individually hand-tuned RE-323 ribbon microphone motor with a 1" long ribbon made from highest quality Japanese aluminum foil and high-grade NdFeB magnets. The motor was designed with the help of magnetic flux analysis software in order to prevent the excessive saturation, reduce the flux leakage by around ten times comparing to RE-254 motor (RM-5 kit) and increase the flux density in the ribbon gap resulting in significantly higher output signal level.

The RTP-28 toroidal transformer of our own design tuned for the higher impedance of thinnest foils gauges makes a perfect match with the motor revealing the great presence effect and preserving the clarity of sound.

Bodies are individually machined by a local company from hand selected stainless steel tubing of finest grades with attention to the details and mechanically matte-brushed for our signature appearance. Our own original XLR receptacle is CNC carved right in the bottom cap and male XLR insert with gold-plated pins is included. The Bumblebee logo is engraved with a fiber laser, so it's nearly impossible to damage it.

-Artur Fischer, Designer
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)
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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 91839762619

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★★★★★ 1
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I gave little Charlee back the bone for a size comparison. She's trying to rip off a piece that she chewed loose. This puppy is only 30 pounds and 7 months old. The bone is clearly rated for puppies up to 8 months old and 60 pounds. It is rated for dogs twice her weight and she was trying to pull chunks off of it. When she grows up she'll still be within the weight limit. There is a lot more damage than pictured and she may have eaten a couple of missing spikes. She is a strong and mildly destructive chewer, but this is unacceptable. I have a smaller version of this bone without the spikes and it has lasted months of gnawing, so I expected that quality to carry over to it's larger cousin. This was a big disappointment.
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Reviewed in the United States on June 25, 2024
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O'Neill
Belleville, US
★★★★★ 5
Very durable; aggressive chewer approves
Size: Jumbo, Style: Chicken
My dog is an extremely aggressive chewer so finding a toy that can survive more than a few days is never easy. This bone has done well for the last couple months. It’s a little bit larger and heavier than I was expecting but isn’t a problem for my German shepherd. It smells fine; at least it isn’t stinky. We play fetch and tug with this toy and there is very little wear and tear and only shows teeth marks. She will sit and chew on the toy for quite a while and seems content while chewing on it. Great tog
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Reviewed in the United States on August 29, 2024
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Kevin Doyle
Draper, US
★★★★★ 2
My puppy shows little interest in this
Size: Small, Style: Beef
I have a 10-week-old puppy and he doesn't seem to show much interest in this toy at all.
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Reviewed in the United States on May 23, 2026
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fordy16
Lake Worth, US
★★★★★ 3
Nice and chewy
Size: Jumbo, Style: Peanut Butter
Thought the dog would like it but she really wasn’t interested
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RC
Dallas, US
★★★★★ 4
Helps With Teeth Cleaning
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Our dog loves chewing on this toy multiple times a day. I believe it helps with teeth cleaning. As we do not brush or add additives to water or food for teeth cleaning. Seems that vet is not suggesting to have teeth cleaned every visit anymore. The rubber is very durable. Last about 6 to 7 months before we start to see deterioration and have to replace.
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