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But please realize that the Audioengine A2 is a powered speaker, so they already have amplification built into them. Therefore you can't add an amp to them.
If you're interested in speakers with built-in amps, the best route is active designs. Actives use a low voltage input signal to feed a sophisticated crossover that in turn feeds one channel of power amplification per driver. Usually all this is done inside each cabinet and is what 95%+ of all studios use. Passives, like Danny and nearly all consumer based companies sell, require an external power amp that feeds the speaker via speaker cable. The Audioengine designs are powered speakers which act simply like passives but with the power amp built into the cabinet. Active has many technical, cost, space, and sonic advantages. But honestly aren't popular with most audiophiles or are in the realm of DIYers.
