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Marantz PM8004

Stereo integrated amplifier

23 Reviews | 1 question - 2 answers

Item # 642PM8004

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Our take on the Marantz PM8004

Marantz based the PM8004 on design elements found in their high-end Reference Series separates. You don't get the fancy champagne gold finish, but you do get an amplifier section optimized for high instantaneous peak current capability. Put on a favorite CD or record album, and you'll feel like you're almost close enough to reach out and touch the artist.

Marantz gives you a front-row seat at a general admission price

Marantz based the PM8004 on design elements found in their high-end Reference Series separates. You don't get the fancy champagne gold finish, but you do get an amplifier section optimized for high instantaneous peak current capability. Put on a favorite CD or record album, and you'll feel like you're almost close enough to reach out and touch the artist.

With 70 high-current watts per channel, the PM8004 can plant a bass drum kick right smack in your solar plexus. Its shielded toroidal transformer does such a great job of minimizing noise, you'll savor delicious nuances in quiet sounds, too.

Plenty of inputs and outputs

The PM8004 gives you six analog audio inputs, including a high-grade MM phono input for your turntable. Separate preamp input/line-level output jacks allow you to use the PM8004 as an independent power amplifier or pre-amp for future system expansion.

Two sets of speaker outputs let you conveniently bi-wire a compatible pair of main speakers, or power a second pair of speakers in another room. The Source Direct mode bypasses the balance and tone control circuits to ensure the purest sound possible.

Praise for the Marantz PM8004 from The Absolute Sound

"With 70Wpc, the PM8004 is tonally neutral, clean, clear, transparent, and dynamic into low-efficiency speakers. The preamp section features an excellent moving-magnet phonostage and headphone amplifier, and the circuit has an unusually high number of discrete parts (rather than ICs). High value."

The Absolute Sound 2013 Editors' Choice Awards: Integrated Ammplifiers under $1000

I love this amp! I did my homework, shopped around and decided on this beauty. Thank you Crutchfield for all the technical support, great pricing and super fast shipping that you provided.

Ken Z, Chippewa Lake, OH

What's in the Box:

  • Integrated Amplifier
  • 68" AC power cord
  • RC003PM wireless remote
  • 2 "AAA" batteries
  • Operating Instructions (English/ French/ Spanish)
  • US Warranty information
  • Canadian warranty information

Product Highlights:

  • 70 watts x 2 channels into 8 ohms (20-20,000 Hz) at 0.02% THD
  • 100 watts x 2 channels into 4 ohms (20-20,000 Hz)
  • 4-ohm capability allows use with a wide range of speakers
  • current-feedback amplification for greater resolution of fine musical detail
  • fully discrete constant current feedback phono preamplifier
  • double-shielded large-capacity toroidal power transformer
  • HDAM-SA3 circuits provide high-speed signal response for precise sound
  • frequency response 5-100,000 Hz (±3dB)
  • signal-to-noise ratio: 90 dB (line in), 87 dB (phono), 106 dB (power amp direct in)
  • 6 RCA audio inputs (including MM phono input)
  • 2 RCA audio outputs
  • bass, midrange, and treble controls
  • Source Direct button bypasses balance and tone control circuits for cleaner sound
  • preamp out/main in jacks
  • headphone jack
  • front-panel switching for 2 pairs of speakers
  • custom Marantz binding-post speaker connectors
  • detachable power cord
  • remote control
  • weight: 26.9 lbs.
  • 17-3/8"W x 5-1/8"H x 15-3/4"D
  • warranty: 3 years
  • Our 60-day money-back guarantee

Marantz PM8004 Reviews

Average Customer Review(s):

(23 Reviews)
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Hands-on research

Features and Specs

Performance Specs
Watts RMS per Channel (8-ohms) 70
Watts RMS per Channel (6-ohms) Not given
Watts RMS per Channel (4-ohms) 100
Frequency Bandwidth 20-20k
THD 0.02%
Minimum Impedance 4 ohms
Signal to Noise Ratio 106
Digital Music Features
Built-in DAC (Digital to Analog Converter) No
High-resolution Audio Playback No
Bluetooth No
Wi-Fi No
Total Analog Inputs 6
Phono Input Yes
Optical Digital Inputs ---
Coaxial Digital Inputs ---
USB Input ---
Preamp Outputs Stereo
Headphone Output 1/4"
Dimensions and Warranty
Width (inches) 17-3/8
Height (inches) 5-1/8
Depth (inches) 15-3/4
Weight (pounds) 26.9
Parts Warranty 3 Years
Labor Warranty 3 Years

Product Research

Overview: The Marantz PM8004 is a two-channel integrated amplifier rated at 70 watts x 2 into 8-ohms and 100 watts x 2 into 4-ohms. In both the pre-amp and power amp sections, the PM8004 uses fully-discrete, high speed current feedback circuits for minimal phase shift and better detail resolution. Even the phono input is a fully discrete, constant-current design optimized for moving magnet phono cartridges. Marantz's HDAM SA3 (Hyper Dynamic Amplifier Module) performs critical stage-to-stage signal transfers. Five of the inputs (all but CD) share a buffer circuit to minimize unwanted interactions between the source and amp. The CD input has a separate buffer for even better isolation. The record outs are also buffered for enhanced recording clarity.



Chassis Construction: The amplifier's chassis uses a triple-layer bottom plate to insure long-term alignment and vibration control. The unit's front panel uses a combination of aluminum and glass-reinforced resin to create a distinctive three dimensional appearance. Indirect reflecting blue LEDs indicate the input selection.

HDAM (High Definition Amplifier Module): Marantz uses HDAMs instead of standard op-amps, resulting in a more dynamic sound with less susceptibility to radiated noise, heat, and vibration. The V/I converter circuit, the key block of the current-feedback pre-amplifier and power amplifier, is equivalent to the HDAM-SA3 amp-module developed for higher-grade Marantz components.

Momentary-Current Supply: The PM8004's main amp has the capability to momentarily pass 25 amps or more, providing high-powered drive to the speakers.

Short Power Line: To improve the momentary-current supply, the large current line connections are as short as possible, while remaining symmetrical. The individual power supply segments are located on the same heat sinks as the output transistors for quicker response to musical transients.

Discrete Current-Feedback Phono Equalizer: The PM8004 provides an all-discrete, current-feedback phono equalizer optimized for moving magnet (MM) cartridges.

Double-Shielded Toroidal Transformer: This unit is equipped with a toroidal power transformer to minimize vibration and leakage flux, which affects sound quality. The outside is double-shielded, using a core ring and a short ring.

Power Amp Direct: The PM8004 can be used as just an amplifier, with a separate pre-amp. Connecting the outboard pre-amp's output to the Power Amp Direct In input bypasses the PM8004's input selector, balance, tone, and volume controls. In this configuration the amp's signal to noise ratio is 125 dB.

Auto Standby: With the Auto Standby Mode turned on this unit will enter standby mode after approximately 30 minutes (continuous) of no output from the speakers or headphones.


Master Power: A mechanical switch turns the main power on/off. When off, the remote has no effect. When on, the remote can be used to switch between on and standby.

Input Selector: A rotary knob on the front panel is used to select the input source (Phono, CD, Tuner, AUX/DVD, Recorder 1, Recorder 2,). Using the remote you can select the input directly.

Bass: A rotary knob adjusts the bass output, +/-10 dB at 50 Hz.

Midrange: A rotary knob adjusts the midrange output, +/-6 dB at 900 Hz.

Treble: A rotary knob to adjust the treble output, +/-10 dB at 15 kHz.

Balance: A rotary knob adjusts the left/right balance.

Speakers: Two buttons allow you to independently select speakers A and B. When using headphones turn them both off; they are not automatically muted.

Power Amp Direct: To engage the Power Amp Direct feature hold this button for three seconds. This bypasses the PM8004's input selector, balance, tone, and volume controls.

Source Direct: When source direct is engaged the bass, midrange, treble, and balance circuits are bypassed.

Remote Control: The supplied wireless remote will control the PM8004 and Marantz CD players, DVD players, tuners, and tape decks.


Speakers: The speaker system A and system B outputs are binding posts. They are not 5-way posts, but will accept single banana plugs, pin connectors, and bare wire up to 10 gauge.

Line Inputs: The CD, Tuner, and Aux/DVD inputs have stereo RCA connectors.

Recorder: Recorder 1 and Recorder 2 each have stereo RCA inputs and outputs.

Phono: The stereo RCA phono input will accept moving magnet cartridges. There is a ground terminal beside the phono input.

Pre Out: Stereo RCA outputs feed a powered subwoofer or another amplifier.

Power Amp Direct In: Stereo RCA inputs feed the amplifier section directly from an outboard pre-amp when using the Power Amp Direct feature.

Remote control: An RCA Remote Control input and output are used with other compatible Marantz components; CD player, DVD player, Tuner, etc. This allows the included remote to control the other Marantz components.

Headphone: A standard 1/4" headphone jack is on the front panel. The speaker outputs are not automatically muted when you plug in headphones so the speakers must be manually turned off.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

1 question already asked

No this unit does not have an attenuation button. The Marantz Reference series Integrated Amp offers a separate attenuation control allowing settings for various decibles [ fred  Mar 19, 2014 ]
The PM8004 has a Source Direct button which bypasses the tone circuits. [ JOSEPH A  Dec 29, 2013 ]