An excellent integrated amp with plenty of power The A-S2200 delivers a robust 90 watts per channel, and it's 4-ohm stable, so it can handle a wide variety of speakers. It offers several features intended to make analog music sources sound superb — balanced and unbalanced inputs, an efficient toroidal transformer, and solid, vibration-resistant construction, to name a few. If you're a bit nostalgic for the components of the 1970s — I grew up with them and I love the look — you'll appreciate…