Marantz MM8003 Power Amplifier

$ 1,699.00 $ 2,399.99

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  • 140W x 8ch (8 ohms) Power Amplifiers
  • Low Impedance Continuous Drive Capability
  • Current Feedback Amplifier Circuit
  • Massive Toroidal Power Transformer
  • 8ch XLR Input Terminals

The Marantz MM8003 Power Amplifier – Multi-Channel Power Amplifier

As a stand-alone multi-channel power amplifier or the perfect complement to the AV8003 preamplifier/processor/tuner, the MM8003 provides Marantz-level performance to power the most advanced A/V systems. Eight channels. A massive power supply. Output devices from our renowned Reference products. Easy connectivity. Flexible, configurable operation. Multi-channel has never been this easy. Or this good. What else would you expect from Marantz? 

140W x 8ch (8 ohms) Power Amplifier


In-Wall Subwoofer Included

The MM8003 power amplifier produces 140 watts of high current output from each of its eight channels. And this is the "real deal", measured across the full audio bandwidth (20 Hz – 20 kHz) at 8 ohms with less than 0.08% THD! In practical terms, this makes the MM8003 an ideal amplifier for a "7.1" system even if that system includes a high quality passive "in-wall" subwoofer. Alternatively, you can opt for stereo output to each of four different rooms and turn each room on and off individually! How’s that for flexibility? 

Power for All Your Entertainment Needs

The massive power supply includes a multiple-secondary toroidal transformer rated at 600 VA and 100,000 µF of custom-designed capacitors mounted in copper-plated, anti-vibration brackets. Critical circuit components from WIMA and other world-class suppliers were chosen only after extensive auditory evaluation. The LAPT Hyper Power devices are the same as used in the Reference Series’ acclaimed PM-11S1. Current feedback topology insures astounding accuracy and control even under high-drive conditions. 

Smart Technology for Superior Sound

Physically, the MM8003’s output stages mount on an extruded aluminum "thermal tunnel" for efficient heat dissipation. With four channels on each side of the tunnel and temperature-sensing forced air cooling, this configuration assures long-term dependability. 


Features a "soft turn-on" circuit that prevents excessive inrush current
Balanced inputs for each channel adhere to the Audio Engineering Society’s "pin 2 = hot" standard. Single-ended RCA inputs complement the balanced XLR connections. And you can choose either balanced or single ended inputs for each channel individually for easy connectivity. Audiophile grade, gold-plated speaker outputs insure tight connections to your choice of speaker wire. 

The MM8003 features a "soft turn-on" circuit that prevents excessive inrush current from tripping an AC breaker or fuse. In addition, you’ll find both input and output jacks for DC "trigger" pulses as well as RC5 jacks for total remote control convenience. 

The chassis itself is heavy gauge copper-plated steel for maximum isolation from external vibration as well as electromagnetic and radio frequency interference. And chassis depth is only 16" so the MM8003 will fit quite nicely in a conventional system rack. 

Elegantly Designed

The subtly three-dimensional front panel adds the classic Marantz design touch. The physical attributes of extruded aluminum and glass-reinforced resin combine ideally for a shaped look and that integrates with any décor. Power. Functionality. Dependability. And classic looks. The MM8003 is Marantz through and through

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