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Amazon.com: EZSound Module for DIY Audio Cards - Easy to Record - 120 Seconds Recording - High Sound Quality : Electronics
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Amazon.co.jp: Cheap & Cost Performance Full Range Speaker Unit 2.5" (61mm) 4Ω/MAX 15W [Speaker DIY Audio]/1 Piece : Electronics
Amazon.co.jp: Hboo NE5532 Vinyl Record Player Preamp, MM Phono Player Board, Gramophone Amplifier, DIY Audio : Electronics
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1 Pair K851 100W FET MOS stereo DIY HIFI AMP Assembled Amplifier Board : Musical Instruments - Amazon.com
Amazon.co.jp: Ferro Fluid System Silk Dome Tweeter Unit with 4 Holes Bezel, 1 inch (24 mm), 8 Ω/MAX30 W [Speaker DIY / DIY Audio] 1 Piece : Electronics