Resonix - passive phone amplifier

Resonix
 

Resonix is a passive amplifier created in a single 3D print, with no moving parts or electronics. Your smartphone’s sound is guided through internal channels and resonance chambers, naturally boosting its volume. The phone is deliberately placed slightly off-center, so that the phone’s speaker aligns exactly with the center of the acoustic pathway. This ensures optimal amplification and a perfectly balanced sound distribution. The dual outlets create a wider soundstage and a surprisingly rich result. A perfect print project that blends design with acoustics.

Resonix – Assembly & Printing Guide

The Resonix consists of two parts:

1. The speaker body
2. The phone bracket

After printing, simply snap the bracket into the speaker body.

Adjusting the Bracket Size

The opening in the bracket can be customized to fit your phone dimensions. This is done by modifying the negative part (included in the print profile).

1. Measure the width and thickness of your phone.
   • If you use a phone case, include it in the measurement.
   • Use a caliper for best accuracy, or estimate with a ruler.
   • Add at least 0.5 mm to both the width and thickness to ensure a proper fit.
2. In Bambu Studio, select the negative part (named cut-out) from the left menu.
   • Click resize.
   • Under X, set the width.
   • Under Y, set the thickness.
   • ⚠️ Make sure “uniform scale” is turned off, and do not scale in Z!

The maximum size for the cut-out is:

• Width (X): 86.5 mm

• Thickness (Y): 13.5 mm

   

Pro Tip

If you increase the thickness (Y) slightly (by 1–2 mm), the phone will lean back a bit when placed. Just be careful not to exceed the maximum dimensions.

Scaling the Model

It’s possible to scale up the entire model for larger devices, but note that it will no longer fit on an A1 Mini printer bed.