Marantz Stereo 70s Slimline Stereo Network Receiver

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A slimline stereo network receiver for a TV-and-music setup with two speakers. The Marantz Stereo 70s is rated at 75 W per channel into 8 ohms, has six HDMI inputs (three support 8K) plus ARC, HEOS streaming, an MM phono input, an AM/FM tuner and two subwoofer outputs. Available in Black and Silver Gold.

Marantz says the Stereo 70s brings the technologies found in its full-size surround receivers to a simple two-channel design in a compact chassis.

Power

75 W (8 ohm, 2 ch)

HDMI

6 in / 1 out, plus ARC

Streaming

HEOS, AirPlay 2, Roon tested

Phono

MM input

Subwoofer outs

Finishes

Black, Silver Gold

Why you will love it

Home cinema from two channels

Six HDMI inputs and one output let you connect a TV, games console and streamer. Three of the inputs support 8K, and the receiver supports HDR10+, Dolby Vision, HLG, ALLM, VRR and QFT pass-through. The HDMI output has ARC.

Marantz says an on-screen display uses your TV to help with setup.

Marantz Stereo 70s in black on a media cabinet beneath a TV

Close-up of the HDMI and speaker connections on the back of the Marantz Stereo 70s

Slim chassis, serious connections

Marantz designed the chassis so the Stereo 70s fits where standard equipment cannot. Behind it there are four speaker terminals (speaker A/B), two subwoofer outputs, analogue inputs, an MM phono input and optical and coaxial digital inputs.

HEOS streaming

HEOS built in lets you stream from services including TIDAL, Deezer, Amazon Music and TuneIn, with AirPlay 2 and Spotify Connect. Marantz notes that service availability varies by region. Decoding covers PCM up to 192 kHz / 24-bit and DSD up to 5.6 MHz.

Marantz Stereo 70s in silver-gold on a media cabinet between two speakers

Sound

The amplifier is a discrete Class A/B design with Marantz Hyper Dynamic Amplifier Modules (HDAM) and a Pure Direct mode. Marantz says its Sound Master tuned the receiver.

Is it right for you?

A great fit if you…

Want one box for TV, games and music with only two speakers
Need several HDMI inputs, including 8K
Want a built-in MM phono input
Want to run one or two subwoofers

Worth knowing

It is a two-channel receiver (2 processing channels), so it is not a surround sound receiver
HDMI output has ARC only (no eARC listed)
The phono input suits MM cartridges only
Only three of the six HDMI inputs support 8K

Build your system

The Stereo 70s needs a pair of speakers.

Speakers: Browse bookshelf speakers and floor-standing speakers. It has A/B speaker terminals.
Bass: Add one or two subwoofers.
Turntable: Browse turntables for the MM phono input.
More Marantz: Compare the Marantz Model 60n stereo network amplifier, or browse stereo amplifiers.

Specifications

Power amplifier

Powered channels	2
Power, 8 ohm (20 Hz to 20 kHz, 0.08%, 2 ch)	75 W
Power, 6 ohm (1 kHz, 0.7%, 2 ch)	100 W
Power, 6 ohm (1 kHz, 10%, 1 ch)	150 W
Topology	Discrete, Class A/B
Speaker terminals	4 (speaker A/B)

Inputs and outputs

HDMI in / out	6 / 1 (3 inputs support 8K)
HDMI features	HDCP 2.3, ARC, HDR / HLG / Dolby Vision / HDR10+, ALLM, VRR, QFT, standby pass-through, upscaling 1080p/4K to 8K
Analogue in	3
Phono	MM
Digital in	1 optical, 1 coaxial
Subwoofer outputs	2
Multi-room out	1 analogue
USB	USB-A host
Tuner	AM/FM

Streaming and files

Streaming	HEOS, AirPlay 2, Spotify Connect, TuneIn, Roon tested
Network	Ethernet, Wi-Fi, Bluetooth (with Bluetooth transmit to headphones)
Lossless	FLAC, WAV, ALAC up to 192 kHz / 24-bit; DSD 2.8 / 5.6 MHz
Lossy	MP3, WMA, AAC
Control	HEOS app, Marantz AVR app, Alexa, Google Assistant, Apple HomePod

General

Power consumption	210 W (0.2 W standby)
Dimensions (W × D × H, without antenna)	17.4 × 14.7 × 4.3 in
Remote	RC-052SR

Specifications from Marantz Australia's Stereo 70s product page, checked November 2026.

What is in the box

Stereo 70s receiver
Remote control and batteries
AM/FM antennas
2 detachable external antennas
AC cord
Wire labels
Quick start guide

Questions people ask

How many HDMI inputs?

Six inputs and one output, and three of the inputs support 8K. The output supports ARC.

Does it have a phono input?

Yes, for MM cartridges.

Does it stream?

Yes. HEOS is built in, with AirPlay 2, Spotify Connect and Bluetooth.

Can I run two subwoofers?

Yes. Marantz lists two subwoofer outputs.

Can it power two pairs of speakers?

It has A/B speaker terminals. Marantz lists four speaker terminals.