About the Manufacturer — Hangzhou Grandix Electronic Co. Ltd.
Hangzhou Grandix Electronic Co. Ltd. is the registered name of the manufacturer behind the GRANVOZ brand. On its official website, the company introduces itself as a professional speaker manufacturer producing car speakers and PA speakers — midrange speakers, tweeters, driver units, subwoofers and coaxial speakers — and also lists wall speakers among its lines.
What the company says about itself
The company's About page states that it was founded in 2008. Other pages of the same website describe the business differently — the home page and a June 2026 news post speak of "two decades of specialization", and a December 2025 news post describes "over 15 years of expertise". All three are the company's own published descriptions; buyers who need a single confirmed figure for their records should ask the sales team to confirm it in writing.
The About page describes a 3.5-acre factory in Anhui, while the home page describes the factory as located in Hangzhou; the company's confirmed office address — published on its Contact page and used for all correspondence on this site — is in Gongshu District, Hangzhou. Ask the sales team to confirm the production address for your order if it matters to your compliance file.
Capabilities the company publishes
- Automatic assembly line — listed among the company's published advantages.
- Sound testing — the company states that its acoustic testing provides Thiele-Small parameters for its speakers.
- SKD service — speaker parts and components supplied directly to overseas assemblers to reduce finished-goods cost.
- OEM / ODM — a published process flow from customer inquiry through design (drawing / BOM), prototype sample approval and molding / tooling to mass production.
- Quality control — the company's advantage list cites a 1‰ failure rate for its QC.
The About page also mentions ceiling speakers and megaphones among the company's products. No separate catalogue families for those products are published, so they are not listed as product lines on this site — ask the sales team if you are sourcing them.
Trade presence
In an October 2026 news post, the company announced its participation in the 140th Canton Fair (Phase 1, booth 18.2E02). The company's Alibaba storefront (grandixelec) is listed as a Verified Supplier, with supplier verification by SGS Group; that is a platform verification status, separate from product certification. Certificates available upon request.
The catalogue behind this site
This website presents the manufacturer's published catalogue: 467 product models in nine families, of which 27 carry a complete specification table. Where the manufacturer publishes no specification table, this site does not invent one — the model is listed in its family catalogue, or presented with the manufacturer's own product description.
Talk to the sales team
Tell us the model, size and quantity you are sourcing. Ask the sales team to confirm the specification, minimum order quantity, packaging and lead time for your exact model in the written quotation before you place an order.