- AMS Enterprises - Manufacturer of custom passive crossover networks for the speaker industry.
www.ams-enterprises.com
- Plus One Engineering Professional Loudspeakers - Manufacturer of professional loudspeaker components, for professional audio and competition automotive markets.
www.emilar.com
- Ruhwa Electronic Co - Founded in 1981. Manufacturer of cone paper, dust caps, h-cones, edge surrounds, and speakers.
www.ruhwa.com
- Tzeng Yih Electronics Co., Ltd. - Manufacturer of loudspeaker cone papers including membrane, PP cone, paper cone, injection cone, aluminum cone, kevlar cone, glass fiber cone, carbon fiber cone, honey cones, H-cones, and dust caps.
www.tzengyih.com.tw
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