
Onkyo TX-NR6100
Score: 82/100
Marantz STEREO 70s
Score: 83/100Rankings

The Marantz STEREO 70s is a compact 2-channel receiver delivering 75 W per channel with modern 8K-ready HDMI connectivity and HEOS streaming. Its limited surround-sound capability and lack of advanced room-calibration features may deter home-theater enthusiasts. Ideal for listeners seeking high-quality stereo performance in tight spaces.

The Onkyo TX-NR6100 is a THX-certified 7.2-channel receiver with 8K/60 Hz HDMI 2.1, VRR, ALLM and robust 100 W per channel output for gaming and home-theater use. Its limited warranty, lack of eARC and sizable footprint may be drawbacks for some users. It fits well for gamers and movie lovers seeking THX-grade performance.
| Attribute | ![]() | ![]() |
|---|---|---|
3 | 6best | |
1best | 1best | |
100 Wbest | 75 W | |
| ↓ lower better | 635 W | 210 Wbest |
| ↓ lower better | 0.1 Wbest | 0.2 W |
2 years | 5 yearsbest | |
| ↓ lower better | 473.5 mm | 441.96 mmbest |
| ↓ lower better | 270.3 mm | 109.22 mmbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Ports(1) | ||
HDMI Inputs | 3 | 6 |
Audio(2) | ||
Supported Audio Formats | FLAC, ALAC, DSD, MP3, WMA, AAC | FLAC, WAV, ALAC, DSD |
Channel Configuration | 7.2 | 2 |
Power(3) | ||
Power Output (per channel, 8 Ω) (W) | 100 W | 75 W |
Power Consumption (Operating) (W) | 635 W | 210 W |
Standby Power Consumption (W) | 0.1 W | 0.2 W |
Features(1) | ||
Video Support (e.g., 4K/8K) | 8K/60Hz,4K/120Hz,HDR | 4K/120,8K |
General(1) | ||
Warranty (years) | 2 years | 5 years |
Build & Design(4) | ||
Width (mm) | 473.5 mm | 441.96 mm |
Height (mm) | 270.3 mm | 109.22 mm |
Depth (mm) | 533.4 mm | 386.08 mm |
Weight (kg) | 10.41 kg | 10.89 kg |


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Professional sources commend the TX-NR6100 for its THX certification, which ensures precise, theater-grade sound, and for its HDMI 2.1 implementation that provides 8K video and gaming-ready features. Reviewers also highlight the flexible powered Zone 2, robust 100 W per channel output, and AccuReflex height-virtualization as key strengths that make it a centerpiece for premium home entertainment.
Consumers repeatedly praise the receiver's straightforward setup process, the breadth of connectivity options, and the ability to stream high-resolution music throughout the house via HEOS. The remote and voice-assistant integration are also frequently mentioned as convenient features.

The Absolute Sound commends the STEREO 70s for its solid stereo power, compact footprint, and a connectivity package that rivals larger AV receivers. Reviewers appreciate the discrete Class A/B amplification, HEOS integration, and the ability to handle high-resolution audio, positioning it as a high-quality music-first component that still accommodates modern video sources.