Review and description of AV-receiver Onkyo TX-RZ900

The new 7.2-channel Onkyo TX-RZ900 model is THX Select2 Plus certified, works with UltraHD (4K, 50/60 Hz) resolution and uses HDCP 2.2 technology to view 4K protected video. The device involves a manually wound toroidal transformer, audiophile capacitors and high-current discrete amplifiers, which allow reaching the lower limit of the frequency response of 5 Hz.
The AV receiver is equipped with 32-bit DSP, supports Dolby Atmos up to 5.1.2-channel configuration, as well as the DTS: X format, which allows the use of additional ceiling speakers. AccuEQ system is used for auto calibration. In each channel, Onkyo TX-RZ900 is set to an AK4458 DAC (32 bit/384 kHz), and VLSC technology is used to eliminate noise caused by clock pulses.
For "fronts", a parallel push-pull amplification circuit is used, which increases the power of the bass. Each channel has a 3-stage inverted circuit with Darlington transistors. WRAT technology is used, which prevents the phase shift, improves the sound and allows you to work even with capricious speakers. The model delivers 200 watts per channel (6 ohms).

The device supports Wi-Fi, Bluetooth, AirPlay and can play DSD (5.6 MHz), FLAC (24 bit/192 kHz) and other audio formats that are stored on computers and servers on the local network. TuneIn Radio, Spotify and Deezer online services are available. There is an AM/FM tuner.
The AV receiver has received a new laconic design. The center of its aluminum facade is occupied by a display, under which is a lid hiding the controls, a 6.3 mm headphone jack, an HDMI port and an input for a calibration microphone. On the right side there is a volume knob, as well as buttons for selecting sources and for controlling zones 2 and 3. On the left is the power/standby button, an activator of “pure stereo” modes, buttons and knobs for selecting sound modes and setting timbres.
The model has wide switching capabilities. Rear panel inputs: 7 HDMI ports (with 4K support), MM-phono preamp input, 2 coaxial/3 optical, USB, Ethernet port, etc. Outputs: 2 x HDMI (one for zone 2), 7.2-channel (RCA ), two RCA for additional zones and others. There are 11 pairs of screw terminals, two of which can be used for zones 2 and 3. You can control the receiver through the remote control or application for devices with Android and iOS.
Model Onkyo TX-RZ900 meets all modern requirements in terms of functionality and provides a rich, powerful, dynamic sound in the movie, as well as accurate, musical and natural sound presentation in stereo mode.

Onkyo TX-RZ900 AV receiver features

THX Select2 Plus certification, Dolby Atmos support
Custom toroidal transformer, high current output cascades
DACs AK4458 (32 bit/384 kHz), DSD playback (2.8/5.6 MHz)

Onkyo TX-RZ900 AV Receiver Features

Number of Channels: 7.2
Output power: 200 W per channel (6 Ohm, 1 kHz, 1% SOI, 1 Channel Driven, IEC), 235 W per channel (6 Ohm, 1 kHz, 1 Channel Driven, JEITA)
Dynamic power: 320 W (3 ohms, front channels), 270 W (4 ohms, front), 160 W (8 ohms, front)
Harmonic factor: 0.08% (20 Hz - 20 kHz, half power)
Damping ratio: more than 40 (8 ohm, 1 kHz, front)
Input sensitivity/impedance: 200 mV/47 kΩ (line input), 3.5 mV/47 kΩ (input of MM phono equalizer)
Nominal output sensitivity/impedance: 1 V/470 Ohm (Pre Out output, output for subwoofer), 100 mV/2.2 kΩ (linear output for additional zone), 1 V/2.2 kΩ (output Pre Out for additional) zones)
Frequency range: 5 Hz - 100 kHz (+ 1 dB, - 3 dB, Direct mode)
Signal-to-noise ratio: 106 dB (line input), 80 dB (MM-phono preamp)
Speaker Impedance: 4–16 ohm
AM/FM tuner: yes
Number of memory presets: 40
Built-in decoders (main): Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, Dolby Digital, DTS: X, DTS-HD Master Audio, DTS-HD High Resolution Audio, DTS 96/24, DTS-ES, DTS, DTS Express
THX Select2 Plus Certification: Yes
HDCP 2.2 support: yes
AC Auto Calibration System: AccuEQ
Number of additional zones: 2
DAC: AK4458 (32 bit/384 kHz)
32-bit DSP processor: yes
Improver for compressed music files: Music Optimizer
Supported streaming audio file formats (over local network): MP3, WMA, WMA Lossless, FLAC, WAV, Ogg Vorbis, AAC, Apple Lossless, DSD (2.8/5.6 MHz), LPCM, Dolby TrueHD
DLNA protocol: v1.5
Wi-Fi support: yes
Bluetooth support: version 2.1 + EDR (A2DP v1.2, AVRCP v1.3)
AirPlay support: yes
Onkyo iPhone and Android app support: yes
Pure Audio mode: turns off display and analog video circuits
Pure Direct Analog Path Mode: disables digital circuits, analog video chains, tuner
PM Bass feature: improves midrange quality and makes bass deeper
Supported Internet services: TuneIn Radio, Spotify, Deezer
Independent adjustment of the crossover frequency for each channel: 40/50/60/70/80/90/100/120/150/180/200 Hz
Inputs: 8 x HDMI (4K/60 Hz, HDMI inputs 1,2,3,4 and 5 with HDCP 2.2 support), 2 component, 3 composite, 8 linear (RCA), MM-phono equalizer (RCA) input, 2 coaxial , 3 optical, USB-port (with support for charging connected devices), Ethernet-port
Outputs: 2 x HDMI (4K/60 Hz, 4: 4: 4 Color Space, ARC, HDCP 2.2; one HDMI for zone 2), component, composite, 7.2-channel Pre Out (RCA), two RCA outputs for zone 2 (adjustable/fixed) and 3 (fixed), 6.3 mm headphone jack
Other switching: IR input, trigger output (12 V), mini-jack for calibration microphone, RS-232 interface, system bus RI jack, AM and FM antennas sockets, ground terminal
Wi-Fi/Bluetooth antennas: 2 pcs.
Output terminals for speakers: 11 pairs of gold plated screw terminals
Power supply: high current H.C.P.S. (High Current Power Supply) with customized toroidal transformer
Power consumption: 840 W, standby: 0.2 W
Remote control: RC-900M, programmable
Dimensions (WxHxD): 435x202x434 mm
Weight: 18 kg

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