A head-to-head AV receiver comparison to help you pick the right one for your system.
Updated August 20, 2026
Verdict
The deciding factor is room correction. The Onkyo ships with Dirac Live, which is generally considered the stronger system and would otherwise be a paid upgrade. The Denon counters with Audyssey MultEQ XT32, more amplified channels on tap, and the wider HEOS ecosystem. Buy the Onkyo if your room is acoustically difficult; buy the Denon if you want the larger feature set and multi-room audio.
X3800H sold out; now sold as the X3900H, under $2,500
Now sold as the X3900H: Check Price| Denon AVR-X3800H | Onkyo TX-RZ50 | |
|---|---|---|
| Room correction | Audyssey MultEQ XT32 | Dirac Live, included |
| Channels | 9.4 processing | 9.2 processing |
| THX certified | No | Yes |
| Multi-room | HEOS built in | Works with Chromecast and AirPlay 2 |
| HDMI 2.1 inputs | Six | Three |
| Best for | Feature breadth, streaming, more inputs | Difficult rooms, correction quality |
The table above compares the Denon AVR-X3800H and the Onkyo TX-RZ50 on room correction, channels, THX certification, multi-room and HDMI 2.1 inputs, and the difference that actually decides it is Dirac Live included on the Onkyo against six HDMI 2.1 inputs versus three on the Denon.
Dirac Live is a room correction system that measures from several microphone positions and corrects the time domain as well as frequency response, which is what earns it its reputation in difficult rooms.
You have several 4K sources at 120 Hz, you want HEOS for whole-home audio, or you expect to add a second subwoofer and use the extra processing channels. Six HDMI 2.1 inputs is unusually generous at this price.
Now sold as the X3900H: new X3800H stock is no longer available on Amazon. Denon has replaced it with the AVR-X3900H, which keeps the 9.4-channel layout, 105 W per channel, Audyssey MultEQ XT32 and four subwoofer outputs, so everything above about the X3800H applies to it. The buttons on this page go to the X3900H.
Check the X3900H (now sold in its place) on Amazon
Your room fights you. Dirac Live corrects over a wider window than Audyssey and generally produces a more even result in rooms with awkward dimensions or reflective surfaces, and here it is in the box rather than a paid add-on.
Most listeners and reviewers rate Dirac Live higher, particularly for time-domain correction and in rooms with strong modal problems. Audyssey XT32 is still capable and its subwoofer handling is good. The practical difference is largest in a poor room and smallest in a well-treated one.
Only if you plan to use it. 9.4 processing lets you run four independently managed subwoofers, which is genuinely useful for smoothing bass across several seats. If you have one subwoofer and no plans for more, it changes nothing.
Both are receivers rather than power amplifiers, so neither is happy driving low-impedance speakers hard in a large room. If your speakers are demanding, budget for external amplification and use the pre-outs, which both units provide.
Comparison based on published manufacturer specifications and the general consensus of owner reports. We have not tested these units side by side. Confirm current prices and specifications before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.