Bespoke Practice Amplifier

Freelance
Overview
I was commissioned to create a unique, one-off miniature practice amplifier. The client wanted a design that used high-quality materials and had a modern, refined look. Inspired by high-end audio equipment, I used materials such as walnut and powder-coated aluminum to ensure the amplifier not only performed well but also looked exceptional.
Discipline
Audio Design
Year
2022
Hero image

Current market

Inspiration touched on home speakers and vinyl players, which occupy a similar market. I drew aesthetic inspiration from the minimalist and geometric elements of these products, emphasizing the use of high-quality primary materials and negative space. This approach diverges from the common use of inexpensive plastics and supplementary materials like fabrics, aiming instead to create a premium, refined design reminiscent of high-end vinyl players in amplifier form.
Moodboard

Early ideation

Early ideation involved retro, radio-like amplifiers before evolving into more cube like designs. The concept of using simple knobs and primary-secondary materials remained consistent throughout the process. The final design draws inspiration from the flat form factor of vinyl record players and contrasting dark materials. Walnut and powder-coated aluminum were chosen as the primary materials, conveying a sense of weight, quality, and value to the user.
Sketches

Exploration through prototypes

I explored various design variations using 3D-printed knobs, and different speaker & control orientations. The flatter form factor was preferred over upright designs due to its distinctiveness from traditional mini amps. The offset speaker grill was an intentional aesthetic choice, breaking the exterior symmetry of the amplifier.
Prototypes
Prototypes

Manufacturing overview

The design underwent thorough reviews and approvals from shop technologists. Detailed blueprints and a comprehensive bill of materials were prepared to ensure precision and quality.

Machining

The machining process was carried out manually on a standard milling machine. Various holes & pockets were precision-drilled into the aluminum plates and the walnut body was crafted from four pieces ensuring a cohesive and robust structure.
Machining
Machining
Machining
Machining

Fabrication

The aluminum plates were powder-coated in carbon black, as the standard aluminum finish was too overpowering for the walnut. The walnut chassis was glued together, sanded, and polished with tung oil. This treatment enhanced the vibrancy of the wood grain and matched the sheen to the aluminum.
Fabrication
Fabrication
Fabrication

Electronics integration

I soldered a small, high-quality 2-watt speaker and PCB board together using basic soldering skills. The layout of the aluminum plate's front side was precisely machined to accommodate the pre-installed knobs and input jack, aligning with the layout of the PCB board.
ELECTRONICS integration
ELECTRONICS integration
ELECTRONICS integration
ELECTRONICS integration
Final in-situ photo
Final in-situ photo
Final in-situ photo
Final in-situ photo