Description
As a PCB manufacturer, we recommend this double-sided PCB for audio amplifier for its precision alignment, clean lead-free HASL finish, and reliable performance in both protection sub-boards and main power boards.
| Material | Layer | Colour | Surface Treatment | Copper Thickness | Board Thickness |
|---|---|---|---|---|---|
| FR-4 KB | 2 | Purple | HASL | 2OZ | 1.5±0.1mm |
Board Specifications
This double-sided board is built on FR-4 substrate with a purple soldermask finish, lead-free HASL surface treatment, 2oz copper thickness, and a board thickness of 1.5±0.1mm. The slightly thinner-than-standard 1.5mm profile is often specified by amplifier manufacturers to match enclosure clearance requirements without sacrificing mechanical strength in a two-layer design.
Application in Amplifier Systems
The panelized sub-board shown here, marked “2D/4D/OUT,” is a relay-based protection and delay circuit commonly used for speaker delay-on and DC-offset protection in audio amplifiers. The matching main board carries the denser routing for the power supply rectification and output stage. Together they illustrate a typical two-board architecture found in mid-power home and car audio amplifiers. (Internal link suggestion: link “protection sub-board” to your existing relay/protection board product page if one exists, and link “power amplifier PCBA” to your PCBA assembly service page.)
Manufacturing Notes
As a PCB company from China, we pay close attention to panelization efficiency and V-cut alignment on multi-up boards like this six-piece panel, since consistent tab spacing directly affects depaneling yield for our amplifier customers.
Why Choose CHNPCB
For a reliable double-sided PCB for audio amplifier manufacturer, look for a supplier that can hold tight thickness tolerances, deliver clean lead-free HASL finishes, and support both small protection boards and full main boards under one production run.
(CHNPCB) specializes in custom double-sided and multilayer PCB manufacturing from our facility in Guangzhou, serving audio, lighting, and industrial electronics clients across the Greater Bay Area and worldwide. For quotes on double-sided PCBs, aluminum substrate boards, or PCBA assembly, contact us at PCB@CHNPCB.COM.
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