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Projects => Build Reports => Topic started by: dbeasley on August 13, 2025, 02:55:25 PM

Title: Trashcompactor Build with characterization plots
Post by: dbeasley on August 13, 2025, 02:55:25 PM
Hello everyone! I build the Trash Compactor compressor awhile back, it sounds great. I had some time to measure it's characterizations on my Audio Precision APx555 and thought I would share some raw data.

Here is a Frequency response plot:

(https://i.imgur.com/wLNSmsa.png)

Here is max input level before clip:

(https://i.imgur.com/3vCM3ds.png)

THD+N vs Amplitude:

(https://i.imgur.com/xhtg8p1.png)

Input control sweep (I made my input trim control an external pot)

(https://i.imgur.com/cpfCfRh.png)

Compression Curves across 9 positions of the COMP knob

(https://i.imgur.com/OHNXJb4.png)

FFT of the output with COMP control at noon:

(https://i.imgur.com/0ZxowG5.png)

Attack and Release Times:

(https://i.imgur.com/a4uZDcZ.png)

Input to Output Phase relationship - Note that the effect does invert the phase of the signal going in:

(https://i.imgur.com/76wCmzl.png)

Overall I really like this comp.
Title: Re: Trashcompactor Build with characterization plots
Post by: jessenator on August 13, 2025, 03:56:03 PM
I'm not seeing any of the images  :o
Title: Re: Trashcompactor Build with characterization plots
Post by: dbeasley on August 13, 2025, 05:22:25 PM
Should be there now! Sorry new to sharing images in this BBS :D
Title: Re: Trashcompactor Build with characterization plots
Post by: NorthCoast on August 13, 2025, 08:57:35 PM
I can see them, those are fantastic! Thanks for posting.
Title: Re: Trashcompactor Build with characterization plots
Post by: Aleph Null on August 14, 2025, 03:49:17 PM
Wow! It looks like it actually compresses!
Title: Re: Trashcompactor Build with characterization plots
Post by: jessenator on August 14, 2025, 04:37:58 PM
Might have to build me a trash compactor now 
Title: Re: Trashcompactor Build with characterization plots
Post by: madbean on August 15, 2025, 12:37:48 AM
Killer stuff. Thanks for taking the time to post your results!