Q10U1A1D2R1I1P3H4O1N1I1C3S1
30 points
QUADRIPHONICS is validvalid
quadraphonics
a system of sound transmission using a minimum of four speakers, also QUADRAPHONICS, QUADRAPHONY, QUADROPHONICS, QUADROPHONY
quadraphonics
a system of sound transmission using a minimum of four speakers, also QUADRAPHONICS, QUADRAPHONY, QUADROPHONICS, QUADROPHONY