Overview

Brass speaker grille etching cuts a field of perforations through C2600, C2680 or H62 brass sheet so sound passes while the driver stays protected, and the measure that matters most is acoustic transparency. Open area, hole diameter and hole pattern decide how little the grille attenuates or colours the sound, so the process is tuned around those acoustic numbers rather than around outline accuracy. Stock from 0.10 mm to 0.80 mm is common, with open area between 40% and 70% and holes from 0.30 mm to 1.50 mm.

Photochemical machining suits this decorative part because it leaves a burr-free, flat sheet with crisp hole edges and no punch distortion that could buzz against the driver. A brass speaker grille etching supplier can offer round, hex or slot patterns, then finish with polishing, brushing, anti-tarnish lacquer or PVD gold and nickel plating to match a premium product. Because there is no hard die, a new hole pattern or logo cut-out is a low-cost film change, and the same artwork repeats from a prototype sample to volume lots for consumer, automotive and hi-fi assemblies.

Parameter Window

• Available Materials: C2600/C2680 cartridge brass, H62/H65 brass, phosphor bronze on request
• Material Thickness Range: 0.10–0.80 mm (0.20–0.40 mm typical for phone and earphone grilles)
• Tolerance: ±0.05 mm on outline, ±0.02 mm on hole diameter, ±0.05 mm on hole position
• Minimum Feature: 0.20 mm round hole, 0.20 mm web, 0.40 mm pitch, open area 40–70%
• Surface Options: polished, brushed, anti-tarnish lacquer, PVD gold/nickel plating, patina, adhesive backing, formed curvature
• Compliance: ISO 9001 process control, RoHS/REACH material traceability

Manufacturing Process / Workflow (8 Steps)

1. Acoustic Review — Fix open area, hole diameter and pattern against the target sound transmission and dust-protection needs.
2. Material Selection — Choose brass temper and gauge, then certify flatness and surface finish before lamination.
3. Cleaning & Lamination — Degrease and laminate dry film on both faces so dense hole arrays stay free of bubbles.
4. Exposure — Expose the perforation artwork and any logo cut-outs with registration to the sheet edge.
5. Development — Develop the resist and inspect for blocked holes or pinholes before etching begins.
6. Controlled Etching — Etch in brass-matched chemistry, holding hole diameter and web width for a clean, burr-free breakthrough.
7. Stripping & Finishing — Strip resist, then polish, brush, lacquer, plate or patinate, and form any required curvature.
8. Inspection & Packaging — Measure open area, hole size and flatness against the approved sample, then pack with a protective liner.

Core Advantages

1. Tuned acoustic transparency: Controlled open area and hole pattern keep attenuation and colouration low while still shielding the driver.
2. Tooling-free patterns: A brass speaker grille etching order changes a hole layout or logo with a new film, with no piercing die.
3. Burr-free quiet edges: Chemical holes leave no burr or loose tab, so the grille does not buzz or rattle at high sound pressure.
4. Premium decorative finishes: Polishing, lacquer, PVD gold and patina give a durable, high-end look alongside the acoustic function.
5. Flat, uniform sheets: No punch distortion means the grille bonds evenly to a frame or curved housing.
6. Prototype to volume: The same film carries a design from a handful of samples to mass production with consistent appearance.

Typical Applications

• Smartphone and earphone grilles: Fine perforated covers with high open area and tight cosmetic control.
• Automotive speaker covers: Formed brass mesh that survives vibration and cabin temperature cycles.
• Hi-fi and loudspeaker mesh: Decorative grilles where appearance and sound transparency must coexist.
• Microphone and headset grilles: Small acoustic screens that resist dents and corrosion.
• Smart-home device vents: Perforated plates over sensors and speakers with a branded finish.
• Acoustic damping screens: Hole patterns chosen to add controlled resistance in front of a driver.

Design Notes & Process Considerations

1. Open area versus protection: State open area, hole diameter and dust goal together; higher open area improves sound but weakens the screen.
2. Moiré and pattern choice: Pick round, hex or slot patterns with the driver geometry in mind, since a regular grid can create visible moiré.
3. Side-etch compensation: Bias hole artwork by roughly one material thickness of lateral undercut per side so acoustic open area lands on target.
4. Burr-free requirement: Call out burr-free, deburred edges, as any loose tab near the diaphragm becomes an audible buzz.
5. Finish and anti-tarnish: Name the lacquer or PVD system, because bare brass tarnishes and plating slightly narrows hole diameter.
6. Forming and mounting: A brass speaker grille etching drawing should define curvature, flatness, adhesive or frame mounting and liner packing.