Audio Database


A pre-main amplifier designed by utilizing the high S/N technology obtained in the development of the separate amplifier SC-5/SM-5.

The characteristic curve of the tone control amplifier section is set to make the best use of the high-performance small speaker, and the active filter type NFB circuit is designed to prevent unwanted band changes.

The volume part uses 4-row active volume system.
This volume incorporates Marantz's original volume technology that emphasizes S/N in actual use. By linking the NF volume of the preamplifier using New HDAM and FET buffer with the main volume, S/N in actual use has been improved.

The power amplifier section uses single-stage voltage amplification and 3-stage Darlington single push-pull configuration.
This circuit employs a multi-feedback system that combines voltage feedback and current feedback to provide excellent static and dynamic performance.

The power supply uses a large R-core toroidal transformer to reduce magnetic flux leakage and transformer noise.
In addition, a noise killer element is inserted into each secondary winding of the power transformer to absorb rectification noise.

The chassis structure is based on a highly rigid zinc die-cast chassis and non-magnetic aluminum is used for the front, rear, side and top exterior panels.

The phono equalizer amplifier section is compatible with both MM and MC cartridges.

Wireless remote control is included.

Model Rating
Type Pre-main amplifier
Input / output terminal Line input : 4 systems
Tape input / output : 2 systems
Phono input : 1 system
Speaker output : 1 system
Rated output 150W + 150W (4 Ω)
120W + 120W (6 Ω)
90W + 90W (8 Ω)
Total harmonic distortion factor 0.008%
Frequency characteristic 10 Hz to 100 kHz + 0 -1dB
Signal-to-noise ratio High Level:111dB
Power consumption 200W (Electrical Appliance and Material Control Law)
Maximum external dimensions Width 458x Height 167x Depth 474 mm
Weight 20.0kg
Attachment Wireless Remote Control