Yep, if you think A7s shrinks it, try A4s + 'subs'. The 411 system's efficiency will only be in the low 90s, so ~10 dB down on the former and ~18 dB down on the latter. At -12 dB, most folks can't hear the lower efficiency speaker without getting right up to it. Little wonder then that typical 'HIFI' speakers sound good even with pretty crappy recordings and totally incapable of reproducing a good one outside the near-field.

GM