Marantz STEREO 70s - Slimline Stereo Amplifier

Marantz STEREO 70s Slimline Amplifier

The Marantz STEREO 70s is a modern, slimline stereo receiver that blends Marantz’s iconic design and “Most Musical Sound” tuning with today’s must-have connectivity. Delivering 75 watts per channel (8 ohms) with a Class A/B amplifier design and HDAM circuitry, it brings rich, detailed stereo performance to music lovers while doubling as a streamlined hub for TV, gaming, and streaming. With 6 HDMI inputs (including 8K support on 3 inputs), ARC for easy TV audio return, and 8K upscaling, it’s built to anchor an elegant two-channel home cinema setup—without the size of a full AVR. Add HEOS Built-in, AirPlay 2, Bluetooth, and broad hi-res file support (up to 192kHz/24-bit and DSD), and you have an all-in-one receiver that’s equally at home with vinyl, streaming, and big-screen entertainment. The Marantz STEREO 70s is part of ListenUp's Marantz Amplifiers Collection.

What It's Good At:

• High-performance stereo sound in a compact chassis that fits tight cabinets and modern living spaces
• TV + gaming centerpiece with 8K HDMI switching, ARC, ALLM, VRR, and Quick Frame Transport support
• Whole-home music made simple with HEOS multi-room streaming and easy control from your phone/tablet
• Hi-res playback with clarity and depth (192/24 and DSD support) for more lifelike listening
• Vinyl-ready listening with a built-in MM phono input and clean analog connectivity
• Bigger bass and better system flexibility with support for two subwoofers, speaker A/B, and 2.2 preamp outputs

Marantz STEREO 70s Full Specifications:

• Power Amplifier
  • Number of Powered Channels: 2
  • Power Output (8 ohm, 20 Hz - 20 kHz, 0.08% 2ch Drive): 75 W
  • Power Output (6 ohm, 1 kHz, 0.7% 2ch Drive): 100 W
  • Power Output (6 ohm, 1 kHz, 10% 1ch Drive): 150 W
  • Discrete Power Amplifier: Yes
  • Amplifier Topology: Class A/B
• Inputs Outputs
  • HDMI In / Out: 6 / 1
  • Analog In / Fixed Level Out: 3 in / out
  • Phono (MM) In: Yes
  • Digital In: Optical / Coaxial: 1 / 1
  • Multi-Room Out: analog / digital: 1 / 0
  • Multichannel Preamp Out: 2.2
  • Subwoofer Out: 2
  • Number of Speaker Terminals: 4
  • Speaker A / B: Yes
  • USB Audio: USB A (Host)
  • AM/FM Tuner: Yes
• Multichannel Surround Technologies
  • Max Number of Processing (Preamp) Channels: 2,1
• HDMI
  • Total HDMI Inputs / No. Support 8K: 6 / 3
  • HDCP2.3 support: Yes
  • HDMI Outputs: Main / Zone: 1 / 0
  • HDMI Upscaling: 1080P/4K to 8K
  • Audio Return Channel: ARC
  • Video Dynamic Range: HDR / HLG / Dolby Vision / HDR10+ / Dynamic HDR
  • ALLM (Auto Low Latency Mode) Pass-through for gaming: Yes
  • Variable Refresh Rate / Quick Frame Transport: Yes / Yes
  • HDMI Pass-Through in Standby Mode: Yes
• Performance Technologies
  • Pure Direct Mode: Yes
  • Gold Plated RCA Terminals: Yes
  • Hyper Dynamic Amplifier Modules (HDAM): Yes
• Music File Support
  • Lossy Formats: MP3 / WMA / AAC
  • Lossless formats: FLAC HD 192/24 / WAV 192/24 / ALAC 192/24
  • DSD Audio: 2.8 MHz / 5.6MHz
  • Gapless Playback: FLAC, WAV, ALAC, DSD
  • Compressed Audio Enhancer: MDAX2: Yes
  • Network Audio Sharing: Yes
• Streaming Services
  • HEOS Multi-room and Streaming: Yes
  • AirPlay Audio Streaming: AirPlay2
  • Internet Radio: TuneIn
  • Spotify*: Spotify Connect
  • Other Streaming Services*: Amazon Music HD/Amazon Music / TIDAL / Deezer / iHeart Radio / Napster / Soundcloud / Mood Mix
  • Roon tested: Yes
  • Pandora: Yes
  • SiriusXM: Yes
• Network Connectivity
  • Ethernet Ports: Yes
  • Bluetooth Re-transmit for Bluetooth headphones: Yes (with volume control)
  • Wi-Fi: Yes
  • Bluetooth: Yes
• Smart Home Integration and Control
  • Voice Assistant Compatibility: Alexa / Google Voice Assistant / Apple HomePod / JoshAi
  • App for Smart Phones & Tablets (iOS & Android): Marantz AVR App
  • HEOS Multi-Room Integrated: Yes
  • HEOS Link Compatibility: IR/ IP: Yes / Yes
  • Multi-Room zones: 1
  • Zone Audio Source: HDMI / Opt, Coax / Network, USB / Analog 2 Ch / 2Ch / Yes / Yes
  • Zone Audio Output: Speaker / Preout: No/Yes
  • HDMI Diagnostics: Yes
• Others
  • Front Display: port hole OLED
  • GUI Languages: English, Spanish, French
  • Setup Assistant: Yes
  • Smart Select on Remote: Yes
  • Firmware Update by Network / USB: Yes / Yes
  • ECO Mode: Yes
  • Auto Power off: Yes
  • Sleep Timer: Yes
• General
  • System Remote Control: RC-052SR
  • Power Consumption in W: 210
  • Standby Consumption in W: 0.2
  • CEC Standby Consumption in W: 0.5
  • Network Standby Consumption in W: Less than 2.0
  • Maximum Dimensions (w/o Antenna) (W x D x H) in inches: 17.4 x 14.7 x 4.3
  • What’s in the box: Main unit, remote control, batteries, AM/FM antennas, wire labels, quick start guide, 2 External Detachable Antenna, AC cord
  • UPC code: 747192140267

Marantz STEREO 70s Q&A:

Is the Marantz STEREO 70s a true 2-channel receiver or a surround AVR?

It’s a 2-channel stereo receiver with stereo-focused amplification, plus AVR-like conveniences such as HDMI switching, ARC, on-screen setup support, and flexible bass options.

How many HDMI devices can I connect, and does it support 8K?

You can connect up to 6 HDMI sources and output to 1 HDMI display, with 8K support on 3 HDMI inputs and 8K upscaling available for compatible content.

Can I connect my TV with a single cable for audio?

Yes. The receiver supports ARC (Audio Return Channel) so your TV can send audio back to the STEREO 70s over HDMI for cleaner wiring and simpler control.

Does it work with streaming and multi-room audio?

Yes. It has HEOS multi-room streaming, plus AirPlay 2, Bluetooth, Wi-Fi, Ethernet, and support for popular services including Spotify Connect and more.

Is it good for gaming?

It supports gaming-friendly HDMI features like ALLM, Variable Refresh Rate (VRR), and Quick Frame Transport to help keep gameplay responsive and smooth on compatible setups.

Can I connect a turntable directly?

Yes. It includes a built-in MM phono input, making it easy to connect a moving-magnet turntable without a separate phono preamp.

Can I run two subwoofers?

Yes. There are two subwoofer outputs, which can help deliver more even, powerful bass in a two-channel or TV-based setup.

Can I use two pairs of speakers (Speaker A/B)?

Yes. It supports Speaker A/B switching with 4 speaker terminals, letting you run two speaker pairs (or switch between zones depending on your layout).

Marantz STEREO 70s Downloads:

Marantz Stereo 70s Info Sheet
Marantz Stereo 70s Owner's Manual