LD3141 データシート - SANYO -> Panasonic
It is a very simple chip, basically comprising a two-transistor amplifier. In Akai's application it is powered by a single 24V supply.
This IC requires no input bias, and it's output is biased internally. It also has a reputation for being noisy. However, as you will see elsewhere in this document, that reputation may be unfounded. There are at least two versions of the LD3141, differentiated by their sub-code, 10 or 20.
I have no idea how they may differ otherwise, although I believe the 10 contains three transistors (in the 1730D-SS 20's are used on the P.B. Amp boards, 10's on the Rec.).