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Quality DIY full-range speaker kits + fully assembled Single Ended and Ultralinear vacuum tube amplifiers. Full-range, high efficiency speakers (with no crossover) from Audio Nirvana, Lowther, + Fostex. Available in 6.5, 8, 10, 12, + 15 inches. The world s only true 10, 12, and 15 inch full-range speakers ever made. Suitable for any cabinet type. The world s best sound...