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Martin Dew

HTF News Editor
HW Reviewer
Nov 1, 2017
United Kingdom
Real Name
Martin Dew
Martin Dew

Next-Gen Onkyo RZ Receivers Step Up from 7 to 9 Channels

Following on from Onkyo's announcement last week about its partnership with 'Works with Sonos', the company has just announced its new 9.2-Channel Network A/V Receivers from the RZ Series: the THX Certified Select TX-RZ830 ($1,399 USD / $1,699.99 CAD) and TX-RZ730 9.2-Channel Network AV Receiver ($1,099 USD / $1,299.99 CAD), and the TX-RZ630 9.2-Channel Network AV Receiver ($899 USD / $1,049.99 CAD).

As well as carrying the 'Works with Sonos' badge as mentioned, allowing these receivers to tie in with the well-known platform, they will give users a chance to issue commands on inputs, volume and auto-waking. When any receiver in the line is connected to Sonos Connect, owners will be able to send any music source on their Sonos app to the receiver, and group the receiver to other Sonos devices on the network. Onkyo says the firmware to achieve this functionality will be available next month.

According to Onkyo, the inbuilt custom high-current transformers and customized block capacitors join upgraded parts to deliver 5Hz-100 kHz frequency response for 'bone-breaking bass and crystalline treble.' Wow, that's some assertion. Each unit supports home theater and multi-room layouts and, features such as a 12V trigger, RS-232C, IP Control and IR input.

Included is Onkyo's proprietary AccuEQ Advance room acoustic calibration technology. In addition to setting parameters such as speaker distance, SP level, and crossover, AccuEQ Advance uses multi-point measurement to eliminate standing waves from the listening space. The technology also detects and compensates for subtle background noise - such as the hum of an HVAC - to ensure accurate equalization. AccuReflex technology aligns the phase of directional and non-directional sounds for comfortable playback through Dolby Atmos-enabled speaker systems.

The TX-RZ830 boasts 120 W/Ch (8 ohms, 20 Hz–20 kHz, 0.08% THD, 2 channels driven, FTC) or 250 W/Ch (6 ohms, 1 kHz, 10% THD, 1 channel driven) while the budget friendly TX-RZ730 has 100 W/Ch (8 ohms, 20 Hz–20 kHz, 0.08% THD, 2 channels driven, FTC) or 225 W/Ch ( 6 ohms, 1 kHz, 10% THD, 1 channel driven).


Both are THX Certified Select A/V receivers for cinema-reference sound and are equipped with 11.2-multichannel pre-outs and processing to enable Dolby Atmos® and DTS:X® soundtrack reproduction though speaker layouts of up to 7.2.4-Ch (with outboard stereo amp). Owners can power digital and analog audio through speakers in Zone 2 and Zone 3 with a 5.2-ch speaker layout in the media room or enjoy object-based audio through a 5.2.2-ch layout with powered audio distribution in Zone 2. Both receivers include Zone 2 and Zone 3 pre-/line-outs to share audio to hi-fi systems in other rooms.

At 90 W/Channel (8 ohms, 20 Hz–20 kHz, 0.08% THD, 2 channels driven, FTC) or 215 W/Channel (6 ohms, 1 kHz, 10% THD, 1 channel driven, the TX-RZ630 is a hub for whole-home entertainment and adds fully immersive 5.2.4-channel DTS:X® or Dolby Atmos® object-based surround-sound to 4K HDR video. It can power speakers in Main, Zone 2, and Zone 3, and share audio to any supported hi-fi system via wireless platforms including Chromecast built-in, DTS Play-Fi technology and FlareConnect. Owners can also stream content over AirPlay, Wi-Fi, or Bluetooth. All three receivers feature Dolby Surround and DTS Neural:X up-mixing solutions.

As to be expected with Onkyo receivers, the new RZ series is packed with audio processing, multi-room, vinyl, and streaming services support. All three receivers sport very sharp-looking aesthetics in the opinion of this writer, particularly the 830, and that's an area in which Onkyo has continually excelled. Full spec lists can be found at www.onkyousa.com. Let us know in the comments section if you're planning to fork out for one of these new multi-feature AV hubs.


Feb 17, 2018
Nashville TN
Real Name
I bought the 810 last year and have been extremely satisfied so far with its performance. Can't see any reason to upgrade to this line, as I only run 5.1 at this time. On the "Pure Audio" setting high resolution audio files are truly incredible-the best sounding amp I've owned at this price point. Maybe the next generation will entice me to give this one up but for now I'm happy with the 810.

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