Eitan Clear Echo
@clearechosound.bsky.social
Surgeon 25 DIY mastering EQ — Part 3 is live on Substack.
Mid-side integration, relay control, and lessons learned along the way.
Surgeon 25 マスタリング EQ 製作記・Part 3 を Substack に公開しました。
ミッドサイド実装とリレー制御、そして制作の中で学んだことについてです。
open.substack.com/pub/clearech...
Mid-side integration, relay control, and lessons learned along the way.
Surgeon 25 マスタリング EQ 製作記・Part 3 を Substack に公開しました。
ミッドサイド実装とリレー制御、そして制作の中で学んだことについてです。
open.substack.com/pub/clearech...
DIY Audio Build: SURGEON 25 (Part 3)
Learning by Necessity, After a First Major Mistake
open.substack.com
January 27, 2026 at 1:05 AM
Surgeon 25 DIY mastering EQ — Part 3 is live on Substack.
Mid-side integration, relay control, and lessons learned along the way.
Surgeon 25 マスタリング EQ 製作記・Part 3 を Substack に公開しました。
ミッドサイド実装とリレー制御、そして制作の中で学んだことについてです。
open.substack.com/pub/clearech...
Mid-side integration, relay control, and lessons learned along the way.
Surgeon 25 マスタリング EQ 製作記・Part 3 を Substack に公開しました。
ミッドサイド実装とリレー制御、そして制作の中で学んだことについてです。
open.substack.com/pub/clearech...
Part 2 of the Surgeon 25 EQ build adventure is on Substack now. Come and join me
open.substack.com/pub/clearech...
open.substack.com/pub/clearech...
DIY Audio Build: SURGEON 25 (Part 2)
Understanding the Core Design and Its Implications
open.substack.com
January 20, 2026 at 2:58 AM
Part 2 of the Surgeon 25 EQ build adventure is on Substack now. Come and join me
open.substack.com/pub/clearech...
open.substack.com/pub/clearech...
DIY Audio Build: SURGEON 25 (Part 1) — Dive into the meticulous journey of building a precise mastering equalizer. Perfect for DIY audio lovers and engineers who love hands-on projects. Read the full build and see detailed photos and notes here: wix.to/8hWixyj
Surgeon 25 (Part 1): DIY Audio Build Insights from Clear Echo
Dive into the DIY Audio Build: SURGEON 25 (Part 1) and discover the meticulous journey of creating a precise mastering equalizer. Perfect for DIY enthusiasts!
wix.to
January 12, 2026 at 11:16 PM
DIY Audio Build: SURGEON 25 (Part 1) — Dive into the meticulous journey of building a precise mastering equalizer. Perfect for DIY audio lovers and engineers who love hands-on projects. Read the full build and see detailed photos and notes here: wix.to/8hWixyj
Dual 5-band parametric mastering EQ is finished. 8 months in the making and many lessons learned. Introducing Surgeon 25!
All resistor pairs (over 1000 resistors) matched to 0.01%
With mid-side and external PSU.
All resistor pairs (over 1000 resistors) matched to 0.01%
With mid-side and external PSU.
December 30, 2025 at 4:42 AM
Dual 5-band parametric mastering EQ is finished. 8 months in the making and many lessons learned. Introducing Surgeon 25!
All resistor pairs (over 1000 resistors) matched to 0.01%
With mid-side and external PSU.
All resistor pairs (over 1000 resistors) matched to 0.01%
With mid-side and external PSU.
Today’s office
December 6, 2025 at 4:59 AM
Today’s office
The mastering EQ I’ve been building has made significant progress since the last update. Part of the process has been learning new skills by necessity to solve issues that came up along the way. This project has been school for me, and it’s getting very close to the finish line.
November 20, 2025 at 12:27 AM
The mastering EQ I’ve been building has made significant progress since the last update. Part of the process has been learning new skills by necessity to solve issues that came up along the way. This project has been school for me, and it’s getting very close to the finish line.
Building a 5-band stereo mastering EQ with mid-side capabilities. PSU, MS matrix and frequency switches are done. A lot more to go, but little by little it’s moving along.
May 19, 2025 at 10:38 PM
Building a 5-band stereo mastering EQ with mid-side capabilities. PSU, MS matrix and frequency switches are done. A lot more to go, but little by little it’s moving along.
My Honda Steed died its final death back in December. It was with me for 12 years and I rode it almost every day. I took 4 months to look for a suitable replacement, and upgraded my license in the meantime. Finally, I found a sweet deal on a Honda NC700X with very low mileage (kilometerage).
May 5, 2025 at 7:06 AM
My Honda Steed died its final death back in December. It was with me for 12 years and I rode it almost every day. I took 4 months to look for a suitable replacement, and upgraded my license in the meantime. Finally, I found a sweet deal on a Honda NC700X with very low mileage (kilometerage).
A pair of CAPI 312 mic preamps. I have plans to build a few more 312 clones of a different variety.
May 5, 2025 at 5:55 AM
A pair of CAPI 312 mic preamps. I have plans to build a few more 312 clones of a different variety.
DIY 11-space 500 series rack by CAPI. This was a simple build, so if you’re looking for 500 series racks and have basic soldering skills, I recommend it.
May 5, 2025 at 5:29 AM
DIY 11-space 500 series rack by CAPI. This was a simple build, so if you’re looking for 500 series racks and have basic soldering skills, I recommend it.
Fixed. Let the music flow!
February 19, 2025 at 6:03 AM
Fixed. Let the music flow!
A bunch of cables came in to the hospital for repair. Have you ever seen anything like this before? Whoever made the cables did a good soldering job, but used cheap connectors. I’m fixing all of them. No one should have to go through a gig worrying about their cables.
#goodcablesmatter #cablerepair
#goodcablesmatter #cablerepair
February 16, 2025 at 8:55 AM
A bunch of cables came in to the hospital for repair. Have you ever seen anything like this before? Whoever made the cables did a good soldering job, but used cheap connectors. I’m fixing all of them. No one should have to go through a gig worrying about their cables.
#goodcablesmatter #cablerepair
#goodcablesmatter #cablerepair
We lost another titan this week. I can’t express how much Dave Jerden’s productions have affected my life. Some of the albums he produced got me through my teens. I remember being blown away by that sound, and I still get goosebumps, this many years later. Thank you, Dave Jerden! 🙏❤️🎶👊
February 8, 2025 at 1:16 PM
We lost another titan this week. I can’t express how much Dave Jerden’s productions have affected my life. Some of the albums he produced got me through my teens. I remember being blown away by that sound, and I still get goosebumps, this many years later. Thank you, Dave Jerden! 🙏❤️🎶👊
Mt. Fuji came out to play today
February 8, 2025 at 5:56 AM
Mt. Fuji came out to play today
@jamiewatts.bsky.social Happy Birthday, Jamie!
January 24, 2025 at 11:23 PM
@jamiewatts.bsky.social Happy Birthday, Jamie!