If you know anything about high-end audio gear, you know about Stereophile. Founded in 1962, it has become the bible of the high-end with in-depth reviews of equipment and music.
Each year Stereophile publishes its list of recommended components, and now that issue, Stereophile Recommended Components 2012, is free on the iPad as an app.
Of course much of the gear is expensive -- like speakers systems selling for many thousands of dollars -- but you can work your way down in price and sonic accuracy, and usually find quality items you can afford.
The iPad app is complete, with mini reviews on hundreds of components, from turntables (remember those?)
