As the Marantz of former years made stereo power amplifier #15 develop combining monophonic power amplifier two sets, the structure completely considered as the right-and-left independent stream composition to the heat sink or the bonnet is adopted.

Circuitry has the composition of having stopped Dynamic Strain by the Low-TIM design of Marantz original. Moreover, in AB class, in order to obtain the tone quality which is not inferior to a pure Class-A, the super high ft transistor which has an amplification property which is generous to a super-high region in the parallel push pull amplification stage by a three-step Darlington connection is adopted, and switching distortion is reduced.
A changeover of a pure Class-A and AB class is possible for an operation, and also it is an enable also as AB class monophonic power amplifier by the BTL interconnection.

In addition to a large-sized transformer, the power-source fraction has adopted “single-sided channel 22,000micro-Fx2” for the capacitor for audios of reliable computer grade.

The protection network by high-speed relay of temperature sensor adoption is built in, and the robustness is improved.

The gilding treatment input terminal is adopted.

The independent power switch and gain control which arranged the sub panel only for right and left are carried.