· Complete separation of left and right channel ground – The ground separation technology incorporated in the P-3 pre-amplifier is applied to this model with a power amplification circuit. Its structure is not the same as the so-called dual-mono construction.

· Single push-pull output stage – The output stage uses a single push-pull SEPP circuit with can-type bipolar transistors as used in the M-3 monoblock.

· 4-stage Darlington configuration with super-powerful driver and pre-driver – To drive the CAN-type transistor easily, an ultra-powerful TO3-type transistor is used in the driver as well as in the pre-driver.

· New Type-R circuit, fully balanced non-NFB – For voltage amplification, a newly developed single-stage Type-R circuit is adopted.

· Ground switching selector – Disconnecting ground, which is one of the main features of the P-3 pre-amplifier, eliminates the sound quality degradation caused by ground loops when many playback devices are connected.

· Relay-switching balanced attenuator

· Ground anchor – The ground of the left and right channel power supply units are grounded to the left and right side metal insulated with ceramic washers, a special enclosure construction that acts as a ground anchor.

· Super-strong power transformer – 2x 700VA unimpregnated toroidal power transformers are used for power amplification.

· High-speed non-NFB power supply

· Copper busbar heat sink

· Unfixed structure

· Volume bypass function

· Multiple-unit connection function

· Record out function