Released in 2021 as part of Onkyo’s new line of 8K-compatible amplifiers, the TX-NR5100 is the gateway to modern home theater. This 7.2-channel model combines the latest technological advances with an accessible price point, all while preserving the sonic DNA that has built Onkyo’s reputation since 1946.
The TX-NR5100 is built on a discrete component amplification architecture, capable of driving 4-ohm loads across all 7 channels. At its core, a custom toroidal transformer ensures stable power delivery, complemented by an isolated network module that minimizes high-frequency interference.
With 80 watts per channel (8 ohms, THD 0.08%), it offers substantial dynamic reserves, reaching 165 watts at 6 ohms. This “Dynamic Audio Amplification” architecture prioritizes transient response, which is especially noticeable during explosive moments in modern soundtracks. Digital processing relies on 192 kHz/24-bit converters and anti-jitter PLL technology, with native support for DSD up to 11.2 MHz.
HDMI 2.1 integration is the main highlight, though the 24 Gbps bandwidth does require some compromises. All four inputs accept 4K/120Hz and 8K/60Hz signals, but without HDR at 4K/120Hz—a limitation for owners of the latest gaming consoles.
The amp includes essential gaming features: VRR to prevent screen tearing, ALLM for automatic low latency, and QFT to reduce display lag. HDR support covers Dolby Vision, HDR10+, and HLG with BT.2020 colorimetry. Dual HDMI outputs allow simultaneous connection to both a TV and a projector.
Compatible with major ecosystems (Sonos, Chromecast, AirPlay 2, DTS Play-Fi), the TX-NR5100 fits seamlessly into a multiroom setup. Dual-band Wi-Fi enables high-resolution streaming, with Spotify Connect, Amazon Music HD, Tidal, and Deezer built in. Bidirectional aptX HD Bluetooth allows streaming from a smartphone or to wireless headphones.
Physical connections include three RCA line inputs, one optical, and one coaxial input. The Zone 2 output can power an additional room, either via reassigned surround channels or through a line output.
The AccuEQ system with AccuReflex calculates distances, levels, and crossover frequencies for each speaker. While less sophisticated than Dirac Live, it fulfills its primary purpose. The Klipsch Optimize mode automatically applies optimal settings for speakers from the American brand.
Dolby Atmos Height Virtualizer and DTS Virtual:X technologies simulate height effects without dedicated speakers. While the result doesn’t replace true physical channels, the sense of spaciousness is still noticeable in 5.1 or 7.1 setups.
Yes, but with significant limitations. The 24 Gbps HDMI ports allow 4K/120Hz only in 4:2:0 without HDR. To fully enjoy the capabilities of a PS5 or Xbox Series X, you’ll have to choose between maximum smoothness (4K/120Hz without HDR) or richer visuals (4K/60Hz with HDR).
Beyond the slightly lower power output (80W vs. 100W), the TX-NR5100 lacks THX certification, has fewer HDMI inputs (4 vs. 6), and uses spring-clip speaker terminals instead of binding posts on all channels. The front USB port is also absent.
For standard home use, AccuEQ does its job well by adjusting distances and levels. The measurements are basic compared to Audyssey or Dirac, but the system correctly detects the setup and applies a suitable correction curve. Purists can always fine-tune manually via the graphic equalizer.
With a Sonos Port (sold separately), the TX-NR5100 becomes part of the Sonos system. The Volume Pass-Through feature lets you control volume directly from the Sonos app, and the amp automatically wakes up when playback starts. It’s a seamless integration for those already invested in the Sonos ecosystem.
Richard
Hello, very good product, easy to install with microphone and powerful! Excellent advice from the top-notch team!
Well done
Comment from August 01, 2025 — Experience from May 24, 2025
Christian
Replacing my aging Yamaha RX, this is a true revolution, very pure and powerful sound for my floor-standing speakers, the display of settings on the TV is a real plus, installation and speaker calibration are very simple with the microphone, Dolby Atmos on the PS5 is a delight.
Comment from March 15, 2025 — Experience from March 04, 2025
Michel
Good equipment, more options and better quality compared to my old Onkyo 444.
Comment from June 07, 2023 — Experience from May 27, 2023
