1 Matched PAIR = 2PCS Replacement Substitute Transistor MARANTZ 2SD188 2SA627
As used in 2215B 2215BL etc
Note; it sometimes happens that after replacement of only one pair, the volume may vary so that one channel has a higher volume than the other, in that case also replace the other pair.
Note picture is from different model but looks the same
zie ook https://www.euromaxx.nu/Hitte-geleidingspasta-koelpasta-spuit-tube-1g