The Denon AVR-X1800H is the receiver we tell most people to buy. The Onkyo TX-RZ30 costs $250 more and answers a specific question the Denon doesn't: what if you want Dirac Live and THX certification without jumping all the way to enthusiast pricing?
For most people, the Denon AVR-X1800H is still the right call. It's $250 cheaper, backed by HEOS multi-room streaming and wide smart-home compatibility, and more than capable for a first Atmos-ready system.
The Onkyo TX-RZ30 is worth the $250 specifically if Dirac Live or THX certification matter to you — the Denon has no Dirac path at any price, and doesn't publish a THX certification at all. The TX-RZ30 also runs two more amplified channels (9.2 vs 7.2), useful if you're planning a slightly bigger Atmos layout.
| Onkyo TX-RZ30 | Denon AVR-X1800H | |
|---|---|---|
| Price | $1,099.99 | $849 |
| Channels | 9.2, 100W per channel | 7.2, 80W per channel (5.2.2 with Atmos) |
| Room correction | Dirac Live Room Correction Full Bandwidth included standard | Audyssey MultEQ XT — no Dirac path at any price |
| Certification | THX Certified | None published |
| Formats | Dolby Atmos, Dolby Vision, IMAX Enhanced | Dolby Atmos |
| Video | HDMI, 4K/120 | Three HDMI 2.1 inputs (8K/60, 4K/120), eARC |
| Streaming | Sonos Certified via dedicated Sonos port | HEOS built-in, Alexa/Google/Siri compatible |
| Klipsch synergy | Klipsch Optimize Mode for Reference/Reference Premiere speakers | None |
| Amazon rating | 4.4 / 5 (105 ratings) | — |
Specs and pricing are from Klipsch's own site (Onkyo is sold through Klipsch's parent company) and Denon's Amazon listing.
This is the clearest difference between the two. The Denon AVR-X1800H ships with Audyssey MultEQ XT and has no Dirac Live option at any price — not even as a paid upgrade, unlike Denon's own step-up models (the X2900H and X3900H both list an optional Dirac Live RC upgrade). If Dirac Live specifically matters to you, the X1800H simply isn't a path to it.
The TX-RZ30 includes Dirac Live Room Correction Full Bandwidth standard, the same room-correction tier as the pricier Onkyo TX-RZ50. It also carries THX certification, which Denon doesn't publish for the X1800H. Our room correction guide covers how Dirac and Audyssey compare if you're deciding how much this matters for your room.
The TX-RZ30 runs 9.2 channels at 100W per channel, two more amplified channels than the X1800H's 7.2 at 80W. The X1800H's seven amplifiers cap Atmos at 5.1.2 — a 5.1 bed plus two height speakers, which is the right size for most rooms. The TX-RZ30's extra two channels open up a slightly bigger Atmos layout without needing to jump to enthusiast-tier pricing like the Onkyo TX-RZ50 or Denon AVR-X3900H.
7.2 channels, HEOS multi-room streaming, and wide smart-home compatibility — $250 less than the Onkyo.
Denon list price: $849 Check price on Amazon Prices change often — verify current pricing on Amazon.9.2 channels, Dirac Live Full Bandwidth included standard, and THX certification the Denon doesn't offer.
Price: $1,099.99 Check price on Amazon Prices change often — verify current pricing on Amazon.Need even more channels and headroom? Compare the enthusiast-tier Onkyo TX-RZ50 vs Denon AVR-X3900H, or browse every budget tier on our receivers page.