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 Sep 15 - Sep 20

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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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Amazon Customer
Natrona Heights, US
★★★★★ 3
Dog treat and chew bine
Size: Medium, Style: Bouncy Bone
This was an ok purchase for my little dog. After eating the treats. She definitely liked this treat. She is 2 years old and loves her treats. Disappointed, in that it does not last as long as they said it would.
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Reviewed in the United States on May 10, 2026
Verified Purchase
333
Houston, US
★★★★★ 5
Boxer Approved!
Size: Small, Style: Bristle Bone
One of my boxer girls (the fawn one in the video, 6 yrs old) hardly ever chews on things, my other boxer girl (the sealed brindle, 11 mos old) chews constantly and we're buying new nylabone chew toys 1-2 times a month for her. I wanted something to encourage my older girl to chew more for dental health and serotonin secretion, I know the benefits of chewing far outweigh the risks for dogs so I've been trying all kinds of things but hooves, ears and real bones get stinky and the girls stop caring for them after a few chew sessions, and my fawn baby only sometimes has interest in chew toys of any kind. When I found this with the different textures, materials (hard plastic, nylon bristles, rubber type discs, & jerky treat) I jumped for one, and it's a HUGE HIT! She loves it, my 11 mo old loves it, and I definitely need backups because they're going to love this one to death in a couple weeks- I'm so happy about that!! Between this and the new snuffle mat we bought at the same time, which both my girls go crazy for, I've finally found enrichment toys that boost my girls health both mentally and physically and they can BOTH get so much joy from them!!! Big wins for this dog momma, I'm ecstatic and grateful we've hit the spot for our babies!! Would recommend and will buy again 10/10, seems durable after at least 5 chew sessions giving the girls turns of 10-15 min each, the video shows the wear from those sessions and it's not too rough yet. Their breath smells better after each session, and my older girl who hardly ever chews sometimes gets bloody gums when she does chew, that's gone away now that she's chewing this toy regularly for about 2 weeks, twice a week (working our way up slowly to 3-4 times weekly). As you can see in the video, they don't even need the jerky treat anymore, they've fallen in love with the toy so much! But it helps encourage them to get their mouth working in different ways around the whole bone and not just one part, so I'll keep getting the treats for better overall coverage of the whole mouth getting cleaned. The size is a little small for my big boxer girls but not too small, they won't swallow any parts but they are mindful chewers, not too heavy-more like medium chewers, and they actually always choose the smaller toys over the big ones so it's perfect to pique their interest! Easy to take apart and clean, put in the treats and hand over to the dogs, they don't unscrew the end of the bone even if it gets a little loose during a chew sesh. We wash it with water after each use and set it out to dry, never gets stinky so far. Good value and great use for the money!
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Reviewed in the United States on June 20, 2024
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Mimi Emily
Natrona Heights, US
★★★★★ 5
All 3 dogs, 3 different sizes and ages love it! Can’t go wrong!
Size: Medium, Style: Bristle Bone
Great! Super great! When you HAVE TO GET THEM OUT OF YOUR HAIR! This toy is durable even without the beef flavored insert! I have a Border Collie who has too much energy and an Aussie who can’t sit still and a small stray who is constantly figuring out a way to steal these from the other two! Safe, effective and actually cleans their teeth! This might well be my first Amazon review because this toy deserves it!
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Reviewed in the United States on March 19, 2026
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Tracie W.
Massapequa, US
★★★★★ 5
Dogs love them
Flavor Name: Peanut Butter, Size: 9.7 Ounce (Pack of 1)
I always give my dogs a bedtime snack. I saw these and decided to give them a try. My dogs absolutely love them. I think it's their favorite thing at night. They digest it well and enjoy the texture and taste. The sticks are just right for smaller dogs. They are easy to store in a container and don't crumble or break. My dogs eat them quickly and without problem. These are not a regular part of our bedtime routine.
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Reviewed in the United States on February 11, 2026
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Lorri Halvorson
Alexandria, US
★★★★★ 5
Dog treats
Flavor Name: Peanut Butter, Size: 9.7 Ounce (Pack of 1)
Great for my dog
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Reviewed in the United States on May 22, 2026

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