The Marantz MODEL 40n is a premium integrated stereo amplifier with HEOS Built-In streaming and HDMI ARC/eARC for simple TV audio integration. Its 70W-per-channel Class A/B design, custom HDAM circuitry, and Sound Master tuning deliver the rich, detailed Marantz sound from any source. Enjoy vinyl with a built-in MM phono stage, plus flexible digital connectivity including optical, coaxial, and USB. Add speakers and you have a luxurious, modern hi-fi centerpiece built for both stereo purity and everyday convenience.
Get the Details

Marantz MODEL 40n Premium Integrated Amplifier

The Marantz MODEL 40n is a premium integrated stereo amplifier that blends classic Marantz analog musicality with modern streaming convenience. Built around Marantz’s custom HDAM amplifier technology and Sound Master tuning, it delivers rich detail, fast dynamics, and a refined, natural presentation—whether you’re spinning vinyl, streaming hi-res favorites, or feeding TV audio through HDMI ARC/eARC. With HEOS Built-In, you can stream from popular services, play music from your home library, and expand into a multi-room system—all from one elegant, luxurious component. Add speakers and enjoy a powerful, future-ready hi-fi hub designed to look as good as it sounds. The Marantz MODEL 40n is part of ListenUp's Marantz Amplifiers Collection.

What It's Good At:

• Delivering warm, detailed Marantz sound with speed and nuance (custom HDAM + Sound Master tuning)
• Powering a wide range of speakers with 70W per channel (8Ω) and robust current delivery
• Seamless TV integration via HDMI ARC/eARC for simple, high-quality 2-channel TV audio
• Effortless streaming with HEOS Built-In, plus AirPlay and Bluetooth support
• Vinyl-friendly listening with a built-in MM phono stage (Marantz Musical Phono EQ)
• Whole-home flexibility—group rooms, sync music, or play different sources across HEOS devices

Marantz MODEL 40n Full Specifications:

• Model: Marantz MODEL 40n (Integrated Stereo Amplifier with Streaming Built-In)
• Channels: 2.2
• Amplifier Topology: Class A/B
• Rated Output Power: 70W + 70W (8 ohm); 100W + 100W (4 ohm)
• Power Amplifier Circuit: HDAM-SA3
• Power Transformer: Double Shielded Toroidal
• Volume Control: Electric
• Tone Controls: Bass / Treble / Mid / Balance: yes / yes / – / yes
• Source Direct: yes
• Frequency Response: 5Hz – 100kHz
• Total Harmonic Distortion: 0.02% (20Hz – 20kHz, 8Ω)
• Damping Factor: 100
• Input Sensitivity (Phono): 2 mV / 47 kohm
• Input Sensitivity (CD/LINE/RECORDER): 220 mV / 20 kohm
• Input Sensitivity (Power Amplifier Input): 1.6 V / 15 kohm
• S/N Ratio: PHONO (MM): 87dB; CD: 106dB
• Phono Input: yes (MM)
• Phono EQ: Marantz Musical Phono EQ
• External Pre Input (Power Amp Direct): yes
• Preout: no
• Analog Inputs / REC Out (RCA): 4 (PHONO, CD, LINE, RECORDER) / 1 (RECORDER)
• Digital Inputs: Optical x1; Coaxial x1
• HDMI: 1 input / 0 output (ARC), PCM only
• USB: USB-A x1 (Rear), Mass Storage Class, 5V/1A
• Speaker Terminal: SPKT-1+
• Remote Control Bus Terminal: yes (RC-5 In / Out)
• Subwoofer Pre-out: yes
• Subwoofer Low Pass Filter (Selectable): 40Hz / 60Hz / 80Hz / 100Hz / 120Hz
• App Control: HEOS App
• Remote Controller: System Remote (features amp and CD player control)
• Voice Control: Works with Amazon Alexa, Google Assistant, or Apple Siri
• Finish Options (Panel Color): SG / BK (Silver-Gold / Black)
• Front Center Panel: Aluminum
• Side Cover: Aluminum
• Top Cover: Steel
• Edge Lighting: yes (Dimmer)
• Volume Knob: Aluminum
• Input Selector: Aluminum
• Bass/Treble/Balance/REC Out Select Knobs: Aluminum
• Power Button: Aluminum
• Chassis Material: SECC
• Bottom Layer: Thicker double layer
• Product Dimensions (W x H x D): 17.4" x 5.1" x 17"
• Packaging Dimensions (W x H x D): 21" x 10" x 20.6"
• Weight: 36 lbs 13 oz
• Carton Weight (Incl. Product): 43 lbs 3 oz
• Power Consumption: 220W; 0.3W (Standby)
• AC Inlet: yes
• Included: Quick Start Guide
• Warranty: 5 Year Warranty
• UPC (USA Black): 747192135959
• UPC (USA Silver-Gold): 747192135966

Marantz MODEL 40n Q&A:

Does the MODEL 40n have streaming built in, or do I need an external streamer?

Yes—streaming is built in via HEOS, plus you can play music using AirPlay and Bluetooth for quick wireless playback.

Can I connect the MODEL 40n to my TV with one cable?

Yes. Use the HDMI ARC/eARC connection to send TV audio to the amplifier through a single HDMI cable (2-channel PCM audio is required).

Is this a good choice for vinyl and turntables?

Yes. It includes an MM phono input with Marantz Musical Phono EQ, so you can connect a compatible turntable directly.

How much power does the MODEL 40n deliver?

It delivers 70W per channel into 8Ω and 100W per channel into 4Ω, providing strong performance for many bookshelf and floor-standing speakers.

Can I add a subwoofer to this stereo setup?

Yes. It includes a subwoofer pre-out with a selectable low-pass filter (40/60/80/100/120Hz) to help blend your sub smoothly.

What wired and digital inputs are included?

You get 4 analog RCA inputs (including phono), 1 optical, 1 coaxial, and 1 HDMI ARC input, plus a rear USB-A port for mass storage playback.

Can I use the MODEL 40n purely as a power amp?

Yes. It has a Power Amp Direct (external pre input) option for integrating into more advanced systems.

How is the MODEL 40n controlled day-to-day?

Use the included remote for classic control, or manage streaming and multi-room playback through the HEOS app. It also supports popular voice assistants.

Marantz MODEL 40n Downloads:

Marantz Model 40n Info Sheet
Marantz Model 40n Owner's Manual
Marantz Model 40n Quick Start Guide