The customer designs and manufactures professional audio signal processing equipment for studio, live sound, and broadcast applications. The JQ AUDIO ISolator required an enclosure that:
① Material Selection 5052-H32 aluminum alloy sheet (1.5mm thickness) was selected as the primary material. Key advantages for this application:
| Property | Benefit |
|---|---|
| High strength | Rigid enclosure with thin walls |
| Excellent formability | Clean bends at corners |
| EMI shielding | Protects internal audio circuits |
| Anodizing compatibility | Deep, uniform black color absorption |
| Lightweight | Ideal for portable audio equipment |
② Sheet Metal Bending — Enclosure Body The main enclosure body was formed through precision CNC bending:
③ CNC Milling & Punching — Interface Cutouts All interface openings were precision machined to exact specifications:
| Interface | Specification | Panel Location |
|---|---|---|
| XLR Female Connector | Standard XLR D-shape cutout | Front panel left |
| RCA Input A & B | Dual Ø8mm precision holes | Front panel |
| Toggle Switches (×2) | LIFT/EARTH switches, precise slot cutouts | Front panel |
| Ground Screw Terminal | M4 threaded hole | Front panel |
| Internal PCB Mounting | M3 threaded standoff holes | Base panel |
All cutout positional tolerances controlled to ±0.1mm for precise connector fitment. 4
④ Surface Treatment — Brushing + Black Anodizing
Stage 1 — Wire Brushing:
Stage 2 — Black Anodizing:
| Parameter | Value |
|---|---|
| Electrolyte | Sulfuric acid solution 18–20% |
| Voltage | 14–18V |
| Bath temperature | 20–22°C |
| Anodizing time | 30–40 minutes |
| Coloring method | Electrochemical black coloring |
| Oxide film thickness | 10–12μm |
| Sealing | Hot water 90–95°C, 20–25 minutes |
The result is the deep, uniform matte black finish visible on the enclosure — consistent across all panels, edges, and machined surfaces.
⑤ Silk Screen Printing Professional branding and port identification labels were applied via silk screen printing:
| Feature | Specification |
|---|---|
| Material | 5052-H32 aluminum, 1.5mm |
| Finish | Brushed + Black Anodized |
| Oxide Film | 10–12μm |
| CNC Tolerance | ±0.1mm (cutouts), ±0.3mm (body) |
| Printing | White silk screen on black anodized |
| Fasteners | M3 countersunk stainless screws |
| EMI Performance | Full aluminum enclosure shielding |
The customer was extremely satisfied with the outcome. The matte black brushed anodized finish gave the JQ AUDIO ISolator an immediately recognizable professional appearance consistent with high-end studio equipment. The precision CNC machining ensured all XLR and RCA connectors fitted perfectly without play or misalignment. The silk screen labeling was crisp, clear, and durable. The customer has since placed repeat orders for additional product lines in the same enclosure style.
