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Premium RZ Series AVRs get a high-octane upgrade with strengthened amps and IMAX® enhanced certification

Posted by Karin Cahill

04/07/19 10:38

Onkyo has added two THX® Certified Select™ and IMAX® Enhanced*1 certified Network A/V Receivers to its premium RZ Series line, each featuring exclusive high-performance amplification systems and state-of-the-art multi-room audio capabilities for enthusiasts demanding a visceral entertainment experience. 

The 9.2-ch TX-RZ840 (215 W/Ch, 6 ohms, 1 kHz, 10% THD, 1-ch driven) and 9.2-ch TX-RZ740 (185 W/Ch, 6 ohms, 1 kHz, 10% THD, 1-ch driven) provide a stable, easy-to-use platform for multi-room entertainment and are perfectly optimised to deliver high-end Dolby Atmos® and DTS:X® surround-sound through speaker layouts of up to 7.2.4 channels (with external power amp) as well as involving musicality with stereo sources. Dolby Surround® and DTS® Neural:X upmixers employ height speakers when playing legacy soundtracks, while Dolby Atmos Height Virtualizer*1 enables immersive listening with Dolby® formats by creating a virtual surround and height effect from traditional speaker layouts. 

These are also the first Onkyo AVRs that have been designed to conform with the IMAX® Enhanced*1 program, which features DTS:X immersive audio decoding that is optimised to properly reproduce the full dynamic range of IMAX theatrical sound mixes available in digitally re-mastered IMAX Enhanced content. The IMAX Mode reproduces lMAX Enhanced content at the highest levels, just as the filmmakers intended. IMAX Enhanced versions of films, from Hollywood blockbuster movies to documentary films, are scheduled for 4K HDR streaming and Ultra HD Blu-ray™ release. Furthermore, the TX-RZ740 and TX-RZ840 are THX® Certified Select™ following 2,000 bench-tests in 75 categories, satisfying THX® requirements for cinema-reference volume in rooms where the viewing position is about 3.5 m from the screen. 

As members of the RZ Series, both products have upgraded Dynamic Audio Amplification (DAA) systems. DAA stabilises high power delivery from a custom-made High-Current Low-Noise Power Transformer and customised, high-current smoothing capacitors, resulting in accurate speaker control and truly spectacular dynamics. Discrete non-phase-shift amps capture a wide 5 Hz–100 kHz frequency response. An extruded aluminium heat-sink controls the length and pitch of resonance frequencies, limiting vibration, while the TX-RZ840’s heat-sink gains black anodised paint that improves cooling efficiencies and reduces thermal distortion. This model announces its hi-fi credentials with an aluminium alloy front-panel and flap door. 

All parts are selected on a listen-measure-listen basis rather than just by assessing their theoretical performance, a resource-intensive way to design, but one that results in subjectively and objectively better sound. A new HDMI® board features shorter signal-paths and larger, carefully refined ground paths for clean A/V signals. The Quad-core SoC (System on a Chip) is isolated to prevent interference, and the power-supply line is further strengthened for 4-ohm driving power. These enhancements result in improved S/N (signal-to-noise) performance and faster dynamic response, and can be felt physically in deep, taut bass, and precise instrument separation and sound localisation on an expanded soundstage. 

The natural articulation of sound inside the listening space is enhanced by the use of AccuEQ Advance 9-point room acoustic calibration. This measures sound at nine positions to precisely calibrate and EQ speakers and subwoofers and remove standing waves from the room. Standing waves occur when sound from the speakers resonates with sound reflecting off the walls, compromising its intended expression. During the calibration process, the system detects and compensates for background noise to ensure accurate equalisation. AccuReflex™ optimises 3D sound through Dolby enabled speakers by resolving phase-shift, resulting in a cohesive sound-field. 

Whether purchased to reinvigorate an existing home cinema or selected as a first AVR to deliver uncompromising reference-grade sound, these two RZ Series products will surpass the very highest expectations. 

Click here for more information on the TX-RZ740

Click here for more information on the TX-RZ840


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Topics: AUS


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