This is a custom 3D printable case designed for a DIY audio project on 9×15 cm universal PCB. This was intended as mono mixer + amp. 

🧩 Features:

Designed for horizontal desktop placement (like a DAC or headphone amp).

Front panel accommodates:

Column speaker terminal: 54×20 mm, front-mounted (2 screws).

Toggle switch (power).

6 mm shaft potentiometer (volume).

DC power jack, with 15 mm screw spacing (2.5 mm holes).

Rear space for input/output wires (RCA or 3.5 mm jack optional).

Optimized for PETG filament, good balance of durability and flexibility.

Ventilation slots (optional depending on print version).

📐 Dimensions:

Outer case size: 165 × 105 × ~55 mm (WxDxH)

PCB mount: Universal board, 9 × 15 cm

Front panel hole details:

Potentiometer hole: 7.5 mm

Toggle switch: 6 mm

DC Jack hole: 8 mm, 2x 2.5 mm mounting holes spaced 15 mm

Speaker terminal cutout: 54 × 20 mm