Speaker kits, loudspeaker design services, sub-woofers and amplifiers.
GR Research offers audiophile quality loudspeaker kits, and accessories for loudspeaker building. We also provide a wide range of design services from complete commercial product line design to assistance with individual custom products and upgrades. We d
Speaker kits, woofers, subwoofers, tweeters, loudspeaker design services, inductors, capacitors, subwoofer amplifiers
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