SKU: 91839762619

RM-6 Ribbon Microphone Kit

Sale price$157.50 Regular price$175.00
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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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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Jean
Grantham, US
★★★★★ 4
Base of you is very durable
Color: Blue
Overall this is a fun toy. My German Shepherd loves it. The ropes were chewed off within the first hour which was disappointing. Using it for treats did not work because the opening is so large. It has become only a chew toy and it is very durable. Since I bought this to enjoy the extra features, I am disappointed. I was able to buy three chew only toys for the same price. I still give it four stars because my dog likes it so much.
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Reviewed in the United States on March 15, 2023
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Terri Bodker
Belleville, US
★★★★★ 1
The dog will destroy the ropes and eat them be careful with this
Color: Blue
The rubber part is very durable but the strings or ropes are not. Puppy is eating the strings and having a hard time pooping them out. Just cut them off close to the knots and watch for them to eat the strings they pull off.
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Reviewed in the United States on December 12, 2022
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lildevil35
Louisville, US
★★★★★ 3
Is not as durable as they say for large dogs
Color: Multi-colored
My dog loved the fact he got a new toy and he loved the toy itself. Carrying it around and shaking it, that is. The ropes are small and pop right back out of the ball. They are more for a small dog to tug on. The suction is strong but still not strong enough for a 100 lbs Rotti. He kept grabbing the eleasic ropes and pulling off the floor.
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Reviewed in the United States on March 20, 2023
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Samantha
Carnegie, US
★★★★★ 5
Even the rope is awesome!
Color: Multi-colored
The suction power on this wasn’t the greatest. Even using the sticky patch provided didn't keep it stuck to the floor. I will say though: I was terrified it would destroy the cheap flooring I put it on, but the sticky stuff didn’t harm the floor at all. The toy itself has been fantastic. My pup loves to chew on all parts of it (the ball, the suction piece, and the rope) and it’s held up against his jaws of steel. I will be purchasing another one of these once he’s finally destroyed the original (we’ve had it almost 3 months with just about daily use).
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Reviewed in the United States on October 22, 2021
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Peggy
Natrona Heights, US
★★★★★ 5
Indestructible
Color: Blue
Best dog toy for my Daschund !
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Reviewed in the United States on October 5, 2025

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