Performed a recap and basic restoration on a small Kenwood integrated amp KA-4002 and it sounds great. The KA-4002 has a cap-coupled output, so it has a warm sound kinda like tube gear and very much so the "1970's vintage sound". All electrolytic caps and "noisy" small signal transistors replaced. Electrolytics caps in audio path replaced with Nichicon KL series or metalized film. All replacement caps chosen for 70% working voltage (or lower) and for best price-point (i.e. if a 50V replacement was more expensive than a 63V one, then I chose the 63V one). Output caps replaced with same-capacitance-value to maintain the design's same low end rolloff. Added snubber caps to the power reservoir and output caps. High-stress resistors (e.g. output transistor emitter ones) replaced with high wattage metal film resistors. Rectifier bridge replaced with modern version. I built a larger spreadsheet with ALL caps, all resistors, all diodes and all transistors... just in case someone needs a reference or I get bored and OCD and replace everything with modern versions.