Shortbus Audio Anomaly (and more possibly)

Hello, I’m Mike from Shortbus Audio (reviews) on youtube and now started a company with the same name focused on making my own IEMs. I’ve made a few DIY ‘mods’ to IEMs such as Letshuoers S12 and S12 Pro, and other various one-offs. Some people enjoy them, and i’m sure some don’t but it’s time to step up to the next level.

I’ve been into audio forever and have a small mixing studio and play guitar and other instruments. I also have a bunch of pro-audio gear, studio monitors, tons of amps and DACs, and am used to studio type of sound.

A few years back I started the review channel on youtube and have tried and rated quite a few IEMs and its pretty fun… until I kind of burned out on reviewing because I want to at least try and make them myself. I figured why not try things that other companies don’t do, whether its just ideas from pro-audio, theater systems, or general audio theory. Why not see what sounds good and works when miniaturized to the size of an IEM?

After spending a ton of money on 3D printer, learning 3D CAD, spending ungodly amounts of time, and buying lots of various things needed to make IEMs, I spent the last year making an IEM called (the) Anomaly. It’s just one DD driver, but packs heat in terms of tech which is why im making this post. Not so much to hype/sell a lot of them (I can’t make a lot or scale up), but to discuss the techs I packed into this IEM.

So here we go:
Final prototype


3D model

Graphs:
Stock tuning


Bass Boost comparison (slide tip backwards)


Distortion measurement

Ok with that out of the way, techs:

  1. ABS resin shell, black, tough and feather light at about 4 grams per IEM
  2. 5 or 7 Hemholtz resonators (depending how you count them)
  3. MiM Dark Magician Driver (yes really), 10mm DLC?! DD driver
  4. Ported transmission line subwoofer, back air volume precisely calibrated
  5. 24mm folded transmission line which is larger than the IEM entirely
  6. Extremely low acoustic impedance

I’m pretty proud of the graphs and sound, and I do not use electronics to shape the sound, this is driver direct to the ear. I do not think anyone else has been able to do this kind of graph shape with 1 DD… probably. The sound is pretty over the top in terms of wideness and 3D, indeed it sounds like putting a DSP type effect on the sound or more like a Dolby Theater than an IEM entirely. Of course I’m a studio guy so im biased to that kind of full-mids near field sound which other folks may not enjoy as much. Regardless, its been a heck of a journey and now its time to make some IEMs.

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It’s really good to see you on here, brother. Welcome :+1:

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thank you man!

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Nice looking graphs. My style. What dB is the distortion graph?

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It’s in overall percent of sound, so this is at most 0.5% distortion, which is good.

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Nice to see you here Mike and all your hard work is finally paying off!

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Thanks TDF. I’ve lurked for years but had nothing to contribute till now.

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Not true this forum could have used your honesty! Needs some fresh air.

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Besides multiple killer mods and plenty of listening/comparison experience! I’ve enjoyed your videos, several of your mods, and learning about the Anomaly will be super interesting. Your deep dive into shell shape and airflow probably means you understand a huge amount about tuning without shortcuts. All kinds of knowledge to share!

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Hello Mike. Nice to see that you are back! I am curious about what your thoughts are about paper filters, mesh filters, and foam filters. Personally, I think that paper filters tend to veil the sound. Do you have any thoughts?