
Last Updated: July 28, 2026. This document governs payment processing, logistics, duties, shipping terms, and sample evaluations for all B2B orders.
All prices shown in checkout are in US Dollars (USD) or converted currency.
We ship worldwide. All sample packages are dispatched within 2–5 business days under EXW (Ex Works) or DAP (Delivered at Place) terms via express B2B air cargo carriers (DHL Express, FedEx, or UPS).
Due to the industrial and B2B custom-evaluation nature of the products, sample orders are non-returnable unless the items received do not match the dimensions or model numbers specified on the order receipt. In the case of manufacturing defects or shipping damage:
To protect delicate components during air transit, all speaker cones and diaphragms are vacuum sealed in moisture-proof plastic bags before being packed into double-wall industrial corrugated boxes with custom foam inserts. Keep materials sealed until installation to prevent atmospheric moisture absorption.