If your 1200 came with a factory radio, the factory speaker and grille mounted on the kick panel under the dash. The stereo option came with two of these, one for each side.
Overview
GRILLE-SPEAKER,FRONT 28177 [empty grille] * 27935-H1110 -8503 Hitachi 商608 * 27935-H1100 -8504-8910 商403 * 27935-H1110 -8503 Hitachi 商608 SPEAKER UNIT 27933 * 27932-G1011 8110- 商608
SPEAKER KIT ? 27932-B5000 UNIT-SPEAKER (AM) 620 ? 27932-B5010 UNIT-SPEAKER 620 0778- < 99993-A0121 $23 USD
You can fit high-quality speakers in the original location:
When the speakers are real big