Stereocheck Reviews:

Onkyo TX-RZ740: 9.2 Channel IMAX Enhanced AV Receiver

The Japanese company Onkyo presents the AV receiver TX-RZ740, the main differences from the previous model TX-RZ730 are: they eliminated one component input, reduced the number of optical inputs from...

Onkyo TX-RZ740
Onkyo TX-RZ740

The Japanese company Onkyo presents the AV receiver TX-RZ740, the main differences from the previous model TX-RZ730 are: they eliminated one component input, reduced the number of optical inputs from 2 to 1, removed two pairs of acoustic terminals and added new IMAX Enhanced technology.

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IMAX and DTS have decided to launch their own certification program for home theater system components and content called “IMAX Enhanced.” They relied on THX, which developed its certification back in 1995. Thus, the IMAX Enhanced license will allow users to select devices and content that “provide a new level of immersive picture and sound quality” at home. The companies are developing a special IMAX Mode for system components that will allow you to enjoy content “as the director intended.” IMAX itself promises to provide documentaries and films from Hollywood studios in remasters. A special version of the DTS:X codec will be responsible for the sound – it, according to the developers, will allow you to get “signature IMAX sound” at home.

In all other aspects, the TX-RZ740 receiver repeats its predecessor. The receiver is capable of receiving and processing all conceivable streams of digital and analogue audio content in the house, as well as providing sound to the entire apartment or cottage using built-in amplifiers. Even a brief description of the device’s capabilities causes shock: it’s as if various catalogs have been collected in a heap and sprinkled with science fiction literature. After which it is difficult to understand whether it is a cinema receiver with “streaming-multiroom” functionality or vice versa.

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The 9.2-channel model of the Onkyo TX-RZ740 receiver is THX Certified Select, i.e. The sound quality of this AV receiver is comparable to the reference sound in a commercial cinema. “Works with Sonos” support is also announced, allowing the receiver to integrate into the Sonos wireless ecosystem using Wi-Fi and the Sonos Connect device. The design uses a high-current power transformer and large, high-capacity buffer capacitors, as well as DAA dynamic amplification technology, which delivers high instantaneous current and includes proprietary noise reduction technology. The result is excellent transient response, detailed sound and a wide frequency range. Such an AV receiver confidently controls even large three-way floorstanding speakers.

The model supports Dolby Atmos and DTS:X in a 5.2.2/7.2-channel configuration, and by adding a stereo end, you can build a 7.2.2-channel system. The receiver can work with Dolby Surround and DTS Neural:X to upmix conventional multi-channel formats to object-based 3D sound. The Onkyo TX-RZ740 uses state-of-the-art AK4458 DACs and VLSC technology to eliminate RF noise. The AccuEQ Advance multi-point metering system helps calibrate the speakers, which also minimizes the amount of standing waves in the room. AccuReflex technology ensures that speakers designed for Dolby Atmos are phase compatible with other speakers.


The device has Bluetooth modules, Wi-Fi (dual bands), supports AirPlay 2 and the Chromacast built in platform for wireless audio streaming, which allows you to use the device with the Google Assistant voice assistant. The DTS Play-Fi protocol is available for transmitting music through an application to the receiver, wireless speakers and other components, as well as FlareConnect technology, which wirelessly broadcasts music in high quality from any source to any room where there are appropriate speakers. At the same time, full multi-room control is provided through the Onkyo Controller application. The receiver has built-in support for online services Deezer, TIDAL, Spotify, TuneIn and Amazon Music. DSD (up to 5.6 MHz), FLAC, WAV, AIFF, ALAC up to 24 bit/192 kHz and Dolby TrueHD are played via local network and USB.

On the rear panel of the Onkyo TX-RZ740 there are six HDMI inputs with support for 4K (60 Hz), HDR10, Dolby Vision, HLG (for TV broadcasts) and HDCP 2.2. There is an HDMI output with a return channel, as well as HDMI for the second zone. There is an 11.2-channel Pre Out, an MM phono input, an Ethernet port, coaxial and optical inputs. You can connect the speakers using 9 pairs of screw terminals.

Characteristics of the Onkyo TX-RZ740 AV receiver

Number of channels 9.2
Output power 175 W per channel (6 Ohm, 1 kHz, 1% THD, 1 channel active, IEC)
Dynamic power 250 W (3 Ohm, front), 220 W (4 Ohm, front), 130 W (8 ohms, front)
Dynamic Audio Amplification (DAA) yes
Harmonic distortion 0.08% (20 Hz – 20 kHz, half power)
Input sensitivity/impedance 200 mV / 47 kOhm (line input) , 3.5 mV/47 kΩ (MM phono input)
Nominal output sensitivity/impedance 1 V/470 Ω (Pre Out), 1 V/470 Ω (Subwoofer Pre Out), 1 V/2.3 kΩ ( Pre Out outputs for additional zones 2 and 3)
Frequency range 5 Hz – 100 kHz (+ 1 dB, – 3 dB, Direct mode)
Voices HF: ± 10 dB (20 kHz), LF: ± 10 dB (20 Hz)
Signal-to-noise ratio 106 dB (line input), 80 dB (MM phono stage input) Speaker
impedance 4–16 Ohms
Built-in MM phono stage with low noise level yes
AM/FM tuner yes
Number of AM/FM presets 40
Built-in decoders ( main) Dolby Atmos (5.2.4/7.2.2 channel config. without additional amplifier, 7.2.4 with additional network power amplifier), Dolby Surround, Dolby TrueHD, Dolby Digital Plus, Dolby Digital, DTS:X, DTS Neural:X, DTS-HD Master Audio, DTS-HD High Resolution Audio, DTS 96 /24, DTS-ES, DTS Express
THX Certified Select supports cinema reference sound in rooms up to 57 cu. m
AccuEQ Advance speaker auto-calibration system with AccuReflex Phase Alignment technology
Additional quantity. zones 2
AK4458 DAC (32 bit/384 kHz)
PLL circuit for jitter suppression on digital inputs S/PDIF yes
32-bit DSP processor yes
Music Optimizer for compressed music files
Supported audio file formats (via LAN and USB) MP3, WMA, FLAC (24 bit/192 kHz), WAV (24 bit/192 kHz), AIFF (24 bit/192 kHz), AAC, Apple Lossless, DSD (up to 5.6 MHz, convertible to PCM), Dolby TrueHD
Wi -Fi IEEE 802.11 a/b/g/n, 2.4/5 GHz
Bluetooth version 4.1 + LE (A2DP v1.2, AVRCP v1.3)
AirPlay support yes
Chromecast built-in support with Google Assistant yes
DTS Play support Fi yes
Support for FlareConnect wireless technology for multiroom installation yes
Support for Sonos wireless multiroom technology yes
Support for the Onkyo app for iPhone and Android yes
Pure Audio mode disables the display and analog video circuits
Direct mode disables digital signal processing
Supported online services TuneIn, Spotify, Deezer , TIDAL, Amazon Music
Inputs 6 x HDMI (4K/60Hz/RGB/4:4:4/4:2:2/4:2:0, HDR10, Dolby Vision, HLG, BT.2020, HDCP 2.2), 1 x HDMI on the front panel (4K/60Hz/RGB/4:2:0, HDR10, Dolby Vision, HLG, BT.2020, HDCP 2.2), 6 line RCA, MM phono input (RCA), 3.5 mm line (front. panel), coaxial, 1 optical, USB for external drives, Ethernet port (LAN)
Outputs 2 x HDMI (HDMI (Main) with ARC support, HDMI (Zone2/Sub) for zone 2), 11.2 channel Pre Out (RCA ), 2 RCA outputs for zones 2 and 3 (pre/line out, variable/fixed, output for zone 3 combined with Pre Out for height channels), 6.3 mm headphone jack Other switching
IR input, trigger output (12V), mini-jack for calibration microphone, RS-232, AM/FM antenna jacks, 2 Wi-Fi/Bluetooth antenna jacks, ground terminal Speaker output terminals
9 pairs of screw terminals
Power supply high current transformer HCPS (High Current Power Supply) with W-shaped core, custom high-capacity buffer capacitors
Power consumption 760 W, standby: 0.15 W
Dimensions (WxHxD) 435x177x380 mm
Weight 10.8 kg