The Stereo 70s is an Streaming Integrated Amplifier by Marantz that delivers 75 watts x 2 channels into 8 ohms and 150 watts x 2 channels into 4 ohms. Minimum impedance of 4 ohms makes the Stereo 70s compatible with a wide range of loudspeakers. Thanks to its built-in DAC, you can play digital sources directly without the need for an external DAC unit. Marantz Stereo 70s lets you connect your turntable via its Phono input and start listening to your vinyl collection without a hassle. Marantz Stereo 70s has an MSRP of 1000$.
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Performance Specs
One of the most important factors when deciding on an integrated amplifier is its power ratings and compatibility with your speaker's impedance requirements.The Marantz Stereo 70s is rated at 75 watts RMS into 8-ohms. Marantz provides this wattage at a THD (Total Harmonic Distortion) of 0.08 % which is an important indicator of distortion at the given values (lower THD is better).
Here are the main highlights of its performance specs:
- 75 watts into 8-ohms (20-20k Hz) at 0.08 %
- 100 watts into 6-ohms
- 150 watts into 4-ohms
- 4-ohms Min Impedance (allows compatibility with a wide range of loudspeakers)
- 74dB Signal to Noise Ratio
When pairing the Marantz Stereo 70s with a passive Bookshelf (Stand mount) or Passive Floor Standing (Tower) speaker, you have to check if their Max Power Range is below the max wattage of the amp for the given impedance levels.
Operating your amp outside of this max range may damage the speakers.
What size of room is the Marantz Stereo 70s Amplifier good for?
An essential deciding factor is the size of the room in which you intend to employ the Marantz Stereo 70s amplifier. Here, taking into account its maximum power parameters, we analyzed its applicability to various size environments:
| Listening Environment |
Suitability |
| Near-field | Poor |
| Small Room | Average |
| Mid-size Room | Good |
| Large Room | Average |
| Very Large Room | Poor |
Inputs and Outputs
Besides the performance specs of the Marantz Stereo 70s, the next important feature set that you have to evaluate is the input and output selections that it offers.
Marantz Stereo 70s has total of 3 Analog inputs including 1 Phono Input (MM).
Marantz Stereo 70s Back View (Click the image for the larger version)
Inputs
- Total Number of Analog Inputs: 3
- Phono Input
- 1 Optical Digital Input
- 1 Coaxial Digital Input
- USB Input:
- HDMI Input (ARC)
Outputs
- Stereo RCA Preamp Outputs
- 1/4 Headphone Output
- Subwoofer Output
Bluetooth Connectivity
Marantz Stereo 70s features built-in Bluetooth 5.0 for wireless music streaming from your Bluetooth-enabled devices such as Apple iPod/iPhone/iPad, Android smartphone/tablet, Windows PC, Mac computers/laptops.
Among the amps in the same price range, these are the 5 amps that have Bluetooth Connectivity:
Bluetooth Transmitter:Marantz Stereo 70s can also act as a Bluetooth transmitter, making it possible to stream the music from the amp to your bluetooth headphones or speakers.
Phono Input
Marantz Stereo 70s features one Phono Input which is compatible with
MM (Moving Magnet) type of phono cartridges, you can connect your turntable with MM cartridges directly to this amp without the need for a phono preamp. If you are using an MC cartridge on your turntable, you need to use a phono preamp that has MC phono stage such as the
Cambridge Duo or the
iFi ZEN Phono.
Subwoofer Output
Marantz Stereo 70s has a dedicated subwoofer output which can be used to connect it directly to a powered subwoofer via an LFE(Low Frequency Effects) cable.
Check our
Powered Subwoofers page to find a subwoofer that will work with Marantz Stereo 70s amp and your speakers.
Marantz Stereo 70s Antennas
DAC and Digital Music
The Marantz Stereo 70s's built-in DAC allows the connection of digital sources directly, eliminating the need for an external DAC.
Marantz Stereo 70s Physical Controls
Marantz Stereo 70s Multiroom
Marantz Stereo 70s Handheld Remote
Marantz Stereo 70s External Dimensions and Weight
Marantz Stereo 70s has external dimensions of (H x W x D) 4-3/16inch x 17-3/8inch x 16-1/16inch (107.0mm x 442.0mm x 408.0mm ). The unit weighs
8.32kg / 18.3lbs.
Base Surface Area
Base surface area of an integrated amplifier may become an important decision factor when the space in your room or desk is limited.
The base area of the Marantz Stereo 70s is approximately 1803.4cm2 / 279.5inch2.
- Width: 442.0mm (17-3/8")
- Height: 107.0mm (4-3/16")
- Depth: 408.0mm (16-1/16")
- Weight: 8.32 kg (18.30lbs)
- Base Surface Area: ~1803.4cm2 / 279.5inch2
- Volume: ~19.3 liter / 5.1 gallon
Available colors
Marantz Stereo 70s is available in Black and Silver color options.
What's in the Box of Marantz Stereo 70s?
Here are the items that are included inside the box of Stereo 70s:
Stereo receiver6-feet AC power cordRemote control (RC052SR)2 -inchAAA-inch batteries2 WiFi/BT antennasFM wire antennaAM loop antennaQuick Start GuideWarranty InformationSafety InstructionsNotes on radioHeos brochure
Official Product Page
Official manufacturer's product page for the Marantz Stereo 70s Integrated Amplifier can be found below:
Official Product Page for Marantz Stereo 70s
Warranty
5 Years of parts warranty and 5 Years of labor warranty is generally provided for the Marantz Stereo 70s by the manufacturer.
Marantz Stereo 70s Lifestyle
| General |
| Brand |
Marantz |
| Full Model Name |
Marantz Stereo 70s |
| Amplifier Type |
Stereo Receiver |
| Amp Class |
Class A/B |
| Performance |
| Watts RMS per Channel into 8-ohms |
75 watts |
| Watts RMS per Channel into 6-ohms |
100 watts |
| Watts RMS per Channel into 4-ohms |
150 watts |
| Frequency Bandwidth |
20-20k Hz |
| THD |
0.08 % |
| Minimum Impedance |
4 |
| Signal to Noise Ratio |
74 dB |
| Digital Music |
| Built-in DAC |
Yes |
| Bluetooth |
Yes |
| WiFi |
Yes |
| Ecosystem |
| Apple AirPlay |
Yes |
| Apple AirPlay2 |
Yes |
| DTS Play-Fi |
No |
| Chromecast built-in |
No |
| Roon |
Tested |
| HEOS |
Yes |
| BluOS |
No |
| CONNECTIONS |
| Total Analog Inputs |
3 |
| Phono Input |
Yes |
| Optical Digital Inputs |
1 |
| Coaxial Digital Inputs |
1 |
| USB Input |
Yes |
| USB Type |
USB A |
| Preamp Outputs |
Stereo RCA |
| Pre-out / Main-in Loop |
No |
| Headphone Output |
1/4 |
| Subwoofer Output |
Yes |
| Removable Power Cord |
IEC 2-prong |
| PHYSICAL SPECS |
| Height |
107.0mm (4-3/16") |
| Width |
442.0mm (17-3/8") |
| Depth |
408.0mm (16-1/16") |
| Weight |
8.32 kg (18.30lbs) |
| Available Colors |
Black,Silver |
| OTHER |
| Tone Controls |
Yes |
| Parts Warranty |
5 Years |
| Labor Warranty |
5 Years |