HC GigaLCR DIY Speaker kit by StereoArt - Fidelity Components Shop
Why Buy A Speaker DIY Kit? (Is it worth it) - Loudspeaker & Acoustic Engineering Design
Amazon.com: HiVi-Swans DIY 3 Way Passive Bookshelf Speakers Pair - DIY Speaker Kit-Peak Power 120 Watt Home Theater Bookshelf Speakers for Surrounds or Front : Electronics