noun
record; sound-recording disc
Refers to a physical disc for recording or playing back sound, such as a phonograph record or a transcription disc.
古い録音盤を再生するには専用のプレーヤーが必要だ。
You need a special player to play old records.
この録音盤
This record contains valuable pre-war audio.
音盤 is a broader term for any sound disc, whereas 録音盤 specifically refers to a disc for recording or containing recorded sound.
Compound of 録音 (recording) and 盤 (disc, board). The exact historical derivation is uncertain, but the word follows a standard pattern for naming technical objects.