Assembled an NFJ YDA138 amplifier kit, including the power supply, into a case. NFJ also sells a dedicated case, but it's too small and not very practical, so I rebuilt it into an aluminum case I had on hand. The volume control is an Alps 24Y with a click, and the electrolytic capacitors on the board have been replaced with Nichicon Gold and similar. Large speaker terminals are used. Operation is good, and being a Yamaha chip, I thought the high and mid-range clarity was excellent. Good sound. No headphone jack. Dimensions: Width 205mm, Depth 260mm, Height 65mm