TARDIS hi-fi system

From Tardis Wiki, the free Doctor Who reference

"Roger" made use of his TARDIS's hi-fi system to listen to Earth music. Though the system was "sophisticated", the sound still came across as tinny; though the TARDIS suggested Roger connect a woofer to its sound system, the Monk instead tried for a much more drastic solution (shrinking the interior space of his control room) before giving up and deciding to listen to some LPs instead. (NOTVALID: How The Monk Got His Habit)