Overview

Custom brass speaker mesh is produced by photochemical machining, a stress-free subtractive process that images a hole pattern onto dry-film resist laminated to thin brass sheet and dissolves the unprotected metal in a cupric-chloride or ferric-chloride chemistry. Aperture diameter, pitch, open area and strand width are set by the artwork and etch dwell, not by punch force, so the fine acoustic holes stay round and burr-free with no rolled edge or heat tint. Typical substrates are CuZn37 (C2680 / H62) cartridge brass in 0.05–0.3 mm gauges, and round, slot or decorative arrays are cut from the same digital master.

For acoustic designers, custom brass speaker mesh solves three recurring problems. Brass foil is soft and springy, so stamping micro-hole grilles tends to dish the part, tear thin webs and wear dies quickly; loudspeaker and earphone guards need open areas above 45% with holes down to 0.15 mm that punching and laser cannot hold cleanly; and brass tarnishes and shows tool marks, which spoils the visible surface of premium grilles. Chemical machining forms every aperture at one time, keeping transmission and stiffness consistent from first article to volume, while the warm brass finish can be lacquered, brushed or plated. New patterns need only a new film, which suits short-run and frequently revised custom programs.

Parameter Window

• Available Materials: CuZn37 / C2680 / H62 cartridge brass, also CuZn10, phosphor bronze and nickel silver for acoustic builds
• Material Thickness Range: 0.05–0.3 mm (common 0.1 / 0.15 / 0.2 mm)
• Tolerance: ±0.02 mm on hole diameter, ±0.03 mm on strand width, ±0.05 mm on outline
• Minimum Feature: 0.15 mm hole diameter, 0.10 mm strand/line width, 0.25 mm pitch
• Surface Options: anti-tarnish lacquer, brushed / satin finish, nickel or gold plating, light sandblast, ultrasonic cleaning
• Compliance: ISO 9001 process control, RoHS/REACH material traceability

Manufacturing Process / Workflow (8 Steps)

1. Artwork & Nesting — Vectorize the acoustic hole array, verify hole-to-thickness ratio, and plan panel layout with tie bars and registration marks.
2. Material Certification & Prep — Confirm brass grade, temper and thickness, inspect for scratches and flatness, then shear to exposure size.
3. Cleaning & Lamination — Degrease and laminate dry-film resist under matched heat and pressure so no bubbles sit under fine strands.
4. UV Exposure — Expose through high-resolution film with the array registered to the sheet edge for panel-level aperture consistency.
5. Development — Wash out unexposed resist to open the hole areas and inspect for residue that would block etching.
6. Controlled Etching — Spray brass-matched chemistry, tuning time, temperature and conveyor speed to hold sidewalls and avoid strand thinning.
7. Stripping & Finishing — Remove resist, neutralize, then lacquer, brush or plate to prevent tarnish and set the visible surface.
8. Inspection & Packaging — Measure hole diameter, open area and flatness on a vision system, then interleave and pack in clean trays.

Core Advantages

1. Burr-free acoustics: Chemical removal leaves no rolled edge or burr, so airflow and sound transmission stay stable and no particles shed into the driver.
2. No die cost: Each new grille pattern is a new film, keeping prototypes and frequent revisions economical without a stamping tool.
3. Warm decorative finish: Brass accepts lacquer, brushing and plating, giving premium grilles a consistent cosmetic surface that painted steel cannot match.
4. Repeatable fine holes: 0.15 mm holes and 0.10 mm strands form together across a panel with tight aperture spread and uniform open area.
5. Stress-free flatness: With no shear or heat input, thin foil stays flat, so bonding to frames or fabrics will not warp it.
6. Fast custom acoustic tuning: With custom brass speaker mesh, hole size, open area and pattern can be tuned item by item to hit a target acoustic resistance.

Typical Applications

• Loudspeaker grilles: Fine-hole protective meshes for hi-fi and cabinet drivers balancing transmission, dust blocking and appearance.
• Earphone and headset guards: Micro-perforated acoustic dampers and dust screens in thin brass foil for in-ear and over-ear devices.
• Microphone windscreens: Sensor and microphone guards where uniform apertures keep acoustic damping consistent.
• Acoustic resistors: Calibrated mesh dampers for receivers and hearing devices that rely on a defined airflow resistance.
• Decorative speaker trim: Visible grille inserts for consumer electronics where the brass finish is part of the design.
• Automotive audio vents: Interior tweeter and speaker covers that combine stiffness, corrosion resistance and a premium look.

Design Notes & Process Considerations

1. Hole-to-thickness ratio: Keep hole diameter at or above material thickness; too small a hole distorts from undercut and thins the strand.
2. Open-area callout: State hole diameter, pitch and open-area percentage, and define round, slot or decorative arrays rather than only a mesh count.
3. Alloy and temper: Choose CuZn37 for formability and warm color or harder temper for stiffness, and note the material standard and certificate needs.
4. Nesting and tie bars: Leave enough tie bars and process borders, and specify the final cut method so thin webs survive stripping and cleaning.
5. Thin-foil handling: For foil below 0.1 mm, specify a carrier or liner and call out flatness and cleanliness to avoid creases and fingerprints.
6. Finish and tarnish control: With custom brass speaker mesh, define lacquer, plating and anti-tarnish requirements, especially for visible and high-humidity parts.