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Current Feedback: The MM7055 is equipped with a current
feedback circuit and uses the same complimentary push-pull circuit as the far
more expensive SM-11S1 power amp, providing minimal phase shift and excellent
detail resolution. The current/voltage conversion section has a Wilson current
mirror circuit to improve circuit stability and high-speed processing.
Instant Power Supply: The final stage of the power amp uses
the same LAPT (high efficiency power transistor) as the SM-11S1, offering instant
power supply capability. The power section has a large transformer and Marantz
original 33,000 μF / 71 V x 2 block condensers to provide a powerful, presence
Heat Dissipation: The chimney-shaped heat sink efficiently
processes the heat emitted from the amp and a quiet cooling fan
removes the heat from the chassis. A high-sensitivity temperature sensor IC is
used to control the cooling fan's rotation speed to match the amount of heat
generated by the amp.
Auto Standby: With the Auto Standby Mode is turned on this
unit will enter standby mode after approximately 30 minutes (continuous) with
no input signal.
Speaker Outputs: The five speaker output terminals are binding
posts; they are not 5-way posts, but will accept single banana plugs, pin connectors,
and bare wire. A plastic collar prevents their use with spade lugs and they're
too far apart for dual banana plugs.
Inputs: Each channel has an RCA (unbalanced) and XLR (balanced)
input. Separate switches for each channel specifies which is engaged.
Display: A blue indicator on the front panel display and a
blue ring around the display light when the power is on; the blue ring around
the display can be turned off if you prefer. Separate red indicators on the
display light when the protection circuit or Auto Standby feature is engaged.
Remote Power Control: This unit is equipped with a remote
power control function; when a compatible Marantz preamp is connected, this
unit's power can be switched on and off simultaneously with the preamp. The
RCA Remote Control input is connected to the preamp and the Remote Control
output can be connected to other compatible Marantz components; CD player,
DVD player, Tuner, etc.
Flasher Input: The IR flasher input is useful with universal
remote controls; power and mute remote codes are available for the MM7055.
DC Control: The 3.5mm mini-jack input allows the MM7055's
power to be controlled by another device (5-15 V). The DC Control output allows
the MM7055 to control the power of another compatible device (12 V/44 mA).
- Power: (20 Hz-20 kHz, 0.08% THD, two
channels driven simultaneously)
- 8 Ω: 140 watts x 5
- 6Ω: 170 watts x 5
- Input Sensitivity:
- RCA: 1.2 V/22 kΩ
- XLR: 2.4 V/30 kΩ
- Signal to Noise Ratio: 105 dB
- Power Consumption: 660 watts
- Standby Power: 0.2 watts
- Weight: 34.6 pounds