
Transform your Boss CS-3 into a smoother, fuller and quieter compressor while retaining the familiar controls and functionality that have made it a pedalboard staple for decades.
This modification combines the popular Reduced Noise Mod and Fat Body Mod (formerly known as the Ross Mod) to address some of the most common complaints about the stock CS-3.
LSD Boss CS-3 Compression Sustainer Mod [OFFICIAL VIDEO] — Coming Soon
CS-3 Tone Upgrade Mod — $89 AUD
Includes:
- Reduced Noise Modification
- Fat Body (Ross) Modification
- Full inspection and testing
- Return postage within Australia
What Does This Mod Do?
Reduced Noise Modification
The stock CS-3 is often criticised for adding noticeable hiss, particularly at higher sustain settings.
This modification replaces several key components in the audio path with higher quality alternatives to help reduce background noise and improve overall clarity.
Fat Body (Ross) Modification
One of the most popular CS-3 modifications ever developed. The Fat Body Mod improves low-frequency response and produces a fuller, more natural compression character inspired by vintage Ross-style compressors.
The result is:
- Fuller bass response
- Smoother highs
- Improved note definition
- More natural compression
- Better feel under the fingers
Who Is This Mod For?
This modification is ideal for players who:
- Find the stock CS-3 noisy
- Want a warmer, fuller compression sound
- Use single-coil guitars and need better noise performance
- Love the simplicity of the CS-3 but want improved tone
- Are looking for a more vintage-inspired compressor character
Can My Boss Pedal Be Modded?
This modification is only available for older CS-3 pedals built with through-hole components. Newer pedals use surface-mount (SMD) components that are too small and densely packed to modify safely, so this service isn’t currently available for them.

Not sure if your pedal qualifies? Send us a photo of the back plate and we’ll check for you.
Booking Information
To arrange a modification, please get in touch using the contact form below.
Please include:
- Your location
- Pedal model
- Any issues you are experiencing
All modifications are performed on genuine Boss CS-3 pedals and are fully tested before being returned.
Request This Mod Back to Pedal Modifications