In the heyday of car audio, there were test CDs that had similar material - tracks to compare left/right, phasing, soundstage, frequency response, and so on. T

In the heyday of car audio, there were test CDs that had similar material - tracks to compare left/right, phasing, soundstage, frequency response, and so on. They're still available from Crutchfield - look for "AutoSound 2000". While geared for car audio (tight control over listener position, questionable speaker placement and acoustics), they're also good for home systems, and somewhat good for headphone/earphone selection. You want disc 2 for basic setup, and disc 1 if you plan on using an oscilloscope or spectrum analyzer.