Exploring the Onkyo TX-RZ70 AV Receiver
Onkyo, a well-known brand in the audio industry, has been working on making a strong comeback with its new generation of AV receivers. In this review, we look closer at the TX-RZ70, the current top model in their lineup, and discover what it offers, apart from its higher price tag.
A Range of AV Receiver Offerings
Most AV receiver manufacturers offer an extensive range of models, varying from entry-level with fewer channels to high-end models with advanced amplification. The challenge often lies in distinguishing the differences between these increasingly expensive models. Onkyo’s TX-RZ70 is the flagship AV receiver, boasting 11.2 channels and a promised 140 Watts per channel across the entire frequency range. It also supports IMAX Enhanced and holds a THX Certified label, demonstrating Onkyo’s continued partnership with THX.
|Power Output per Channel||140 W at 8 Ohms|
|Frequency Response||10 Hz to 100 kHz +1/-3 dB|
|THD+N||0.08% (20 Hz to 20 kHz)|
|Speaker Impedance||4 to 16 Ohms|
|DTS Compatibility||DTS Neural:X, DTS:X, IMAX Enhanced|
|Dolby Compatibility||Dolby Atmos, Dolby Surround|
|Auro 3D Support||Yes|
|Upmixing Technology||Dolby Surround, DTS Neural:X, Dolby Atmos Height Virtualization Technology|
|HDR Compatibility||HDR10+, Dolby Vision|
|Rear A/V Inputs||6 x HDMI 2.1|
4 x Stereo RCA Composite
1 x Stereo RCA (Phono) with Ground Screw Composite
2 x RCA Composite
1 x 3RCA Component
2 x Digital Coaxial
2 x Optical TOSLINK
|Rear A/V Outputs||3 x HDMI 2.1 Zone 2|
2 x RCA Subwoofer Pre-Out
1 x Stereo RCA Composite Zone 3 Pre-/Line-Out
1 x Stereo RCA Composite Zone 2 / Zone B Line-Out
3 x Stereo RCA Composite Pre-Out
2 x Stereo RCA Composite Height Pre-Out
1 x RCA Composite Pre-Out
|Front I/O||1 x HDMI Input|
1 x 1/4″ / 6.35 mm Headphone Output
1 x 1/8″ / 3.5 mm Setup Mic Input
|Other Rear I/O||1 x AM Block Input|
1 x FM Coaxial F-Type Input
1 x RJ45 (Ethernet) Input/Output
1 x USB-A Input/Output
1 x 1/8″ / 3.5 mm (12 V Trigger) Output
1 x 1/8″ / 3.5 mm (IR) Input
1 x DE-9 (RS-232C) Input
|Speaker I/O||13 x Binding Post Pairs (Front, Center, Height, Height 2, Rear, Rear Surround)|
|HDCP Support||Yes, Version 2.3|
|HDMI Compression Modes||Not Specified by Manufacturer|
|Audio Return Channel (ARC)||eARC|
|Supported Audio Codecs||AAC, aptX, aptX HD, SBC|
|Wireless Audio Protocols||AirPlay 2, Chromecast built-in, DTS Play-Fi, Roon Ready, Spotify Connect|
|Virtual Assistant||Apple AirPlay, Works with Alexa, Works with Google Assistant|
|Mobile App Compatible||Yes|
*As of July, 2023: Check with manufacturer for the most up-to-date compatibility
|AC Input Power||120 VAC, 60 Hz|
|Power Consumption||Maximum: 1095 W|
|Dimensions (W x H x D)||17.1 x 7.9 x 18.9″ / 435.0 x 201.0 x 480.0 mm|
|Weight||48.5 lb / 22 kg|
Performance and Pricing
Priced at 3,299 euros, the TX-RZ70 competes with other high-end AV receivers like the Denon AVR-X6800H and the Yamaha RX-A8A. These receivers cater to users who seek the ultimate surround sound experience. While design, streaming features, and operation aspects of the TX-RZ70 closely resemble its sibling, the TX-RZ50, this review focuses on what sets the TX-RZ70 apart.
The performance of the Onkyo TX-RZ70 AV receiver is a crucial aspect that determines its effectiveness and overall audio quality. Here, we delve into the receiver’s performance in various aspects:
Amplification and Power: The TX-RZ70 boasts 11.2 channels of amplification, providing an impressive 140 Watts per channel across the entire frequency range. This robust amplification is a significant advantage, especially for users with demanding speaker setups. It ensures that the receiver can deliver ample power to each channel, resulting in clear and dynamic audio reproduction.
Sound Precision and Clarity: When it comes to sound precision and clarity, the TX-RZ70 demonstrates its capabilities. It excels in positioning audio elements accurately within the soundstage. Whether you’re watching movies with immersive Dolby Atmos content or listening to music, the receiver’s precision enhances the overall audio experience. Sound effects are distinct and well-defined, contributing to an immersive and engaging listening experience.
Dynamic Range: The receiver’s dynamic range is another area where it shines. It can handle both subtle nuances and high-impact moments in audio content effectively. This means that quiet dialogue remains clear and intelligible, while explosive action scenes or musical crescendos are delivered with impact and energy.
Gaming Performance: The controlled nature and speed of the TX-RZ70 make it particularly suitable for gaming. It excels in handling dynamic gaming content where sound effects change position based on player movements. This capability enhances the gaming experience by providing accurate audio cues, allowing players to react quickly to in-game events.
Versatility: One of the standout features of the TX-RZ70 is its versatility. It supports a wide range of audio formats and configurations, making it suitable for various setups, from simple stereo configurations to complex 7.2.4 Dolby Atmos systems. Additionally, its full pre-outs enable users to connect external amplifiers for even greater flexibility.
Calibration and Dirac Support: The inclusion of a full Dirac license is a significant advantage. Dirac Live calibration ensures that the receiver can optimize audio performance in your specific room, correcting for room acoustics and speaker characteristics. It provides a tailored listening experience, which can significantly enhance audio quality.
Overall Immersion: The TX-RZ70 delivers an immersive audio experience. Whether you’re watching movies or playing games, the receiver’s ability to create a well-defined surround soundstage ensures that you are fully immersed in the content. Sound effects are positioned with accuracy, enhancing the overall sense of presence.
In conclusion, the performance of the Onkyo TX-RZ70 AV receiver is impressive, particularly in terms of amplification, sound precision, and versatility. Its ability to handle dynamic content, support various audio formats, and offer advanced calibration options sets it apart as a top-tier AV receiver for users seeking a high-quality audio experience.
Solid Build and Weight
The first noticeable difference is the TX-RZ70’s weight, indicating a more robust internal structure. Its impressive power supply underscores its commitment to delivering quality audio performance. In terms of design, the TX-RZ70 maintains Onkyo’s traditional approach with a button-rich front panel, offering quick access to functions. Additionally, a concealed metal flap reveals even more buttons for in-depth control, although the TV interface and remote offer a more user-friendly experience.
Build Quality: The build quality of the Onkyo TX-RZ70 is solid and robust. Onkyo has designed this receiver to be sturdy and durable, ensuring it can withstand daily use in a home theater or audio setup. The receiver’s substantial weight indicates its quality, hinting at the presence of high-quality components and materials.
The internal components, including the amplification circuitry and power supply, are designed to deliver reliable and consistent performance. This is particularly important for an AV receiver with 11.2 channels of amplification, as it needs to provide ample power to drive multiple speakers effectively.
Design: The design of the TX-RZ70 is functional and straightforward, focusing on usability and ease of operation. While it may not feature a flashy or extravagant exterior, it offers a clean and practical aesthetic well-suited for placement in an AV cabinet or rack.
Key design elements include:
- Button Layout: The receiver’s front panel features a well-organized layout of buttons and controls. These buttons provide quick access to essential functions like input selection and volume adjustment. While some may prefer a minimalist look, physical buttons can be advantageous for those who want tactile control without relying solely on a remote or app.
- Ventilation Grilles: The receiver’s ventilation grilles are strategically placed for efficient heat dissipation. This is crucial, especially for a powerful AV receiver like the TX-RZ70, as it helps maintain optimal operating temperatures and prevents overheating during prolonged use.
- Display: The front display on the receiver is functional and provides essential information about the current status and settings. The green characters on the display offer a classic and easily readable appearance.
- Button Flap: An interesting design feature is the large metal flap beneath the display. It reveals additional buttons for more in-depth control and adjustments when folded down. This flap adds versatility to the receiver’s physical interface, allowing users to fine-tune settings without needing a remote.
- Inputs and Outputs: The receiver’s rear panel houses a comprehensive array of inputs and outputs, including HDMI inputs and outputs that are compatible with HDMI 2.1. This ensures compatibility with modern 4K and 8K sources, as well as next-gen gaming consoles. The flexibility of these connections makes the receiver suitable for various home theater setups.
- Overall Aesthetics: The TX-RZ70 boasts a clean and unassuming appearance that prioritizes functionality over flashy aesthetics. It is designed to seamlessly blend into an audio-visual setup, allowing the focus to remain on the audio and video experience rather than the receiver’s appearance.
In summary, the Onkyo TX-RZ70 strikes a balance between build quality and design. Its robust construction ensures longevity and reliability, while its practical design facilitates ease of use and integration into home theater systems. While it may not be the most visually striking AV receiver, it is well-suited for audiophiles and home theater enthusiasts who prioritize performance and functionality over flashy aesthetics.
Flexibility in Configuration
An AV receiver’s rear panel is where the real action happens, and the TX-RZ70 doesn’t disappoint. With six HDMI inputs and three HDMI outputs, almost all of which are HDMI 2.1 compatible, it can handle 8K/60 or 4K/120 signals from next-gen gaming consoles. Additionally, it supports HDMI switching to separate zones, allowing you to send different content to various rooms. Despite being an 11.2 receiver, the TX-RZ70 offers surprising flexibility. You can set up a 7.2.4 Dolby Atmos configuration, opt for a simpler setup, or control second or third zones. Bi-amping front and center speakers is also possible, and the full pre-outs let you send channels to external amplifiers.
The Onkyo TX-RZ70 offers impressive flexibility in its configuration, allowing users to tailor their audio and home theater setups to their specific preferences and requirements. Here are some key aspects of the receiver’s flexibility:
- Amplification Flexibility:
- 11.2 Channel Support: The TX-RZ70 is equipped with 11.2 channels of amplification, which means it can power up to 11 speakers and two subwoofers independently. This flexibility is ideal for creating immersive and intricate audio setups, such as a 7.2.4-channel Dolby Atmos configuration, which includes height speakers for a more three-dimensional sound experience.
- Bi-Amping: Users have the option to bi-amp their front speakers or center speaker, which can enhance the performance of these critical channels. Bi-amping involves using two amplifier channels for a single speaker, typically separating the low and high-frequency components for improved clarity and power distribution.
- Zone Configuration:
- Multi-Zone Audio: The receiver supports multi-zone audio, allowing users to play different audio sources in separate zones or rooms. This is useful for distributing music or audio to various areas of a home simultaneously. It offers the flexibility to entertain guests in one room while someone else enjoys music in another.
- Zone 2 and Zone 3: The TX-RZ70 provides Zone 2 and Zone 3 pre-outs, enabling users to connect external amplifiers and speakers for these zones. Each zone can have its audio source, volume control, and settings, enhancing the versatility of the receiver.
- HDMI Flexibility:
- HDMI 2.1 Support: The receiver features HDMI 2.1 compatibility on most of its HDMI inputs and outputs. This ensures support for the latest video and audio formats, including 8K/60Hz and 4K/120Hz signals. Gamers and home theater enthusiasts can take full advantage of next-gen gaming consoles and high-resolution displays.
- HDMI Zone 2: Users can utilize HDMI Zone 2 to send video and audio from a different source to a second zone or room. For example, you can watch a movie in the main home theater while someone else watches a different video source in Zone 2.
- Full Pre-Outs: The TX-RZ70 includes full pre-outs for all channels, allowing users to connect external power amplifiers for each channel. This level of flexibility is beneficial for those who want to achieve even higher power output or use specialized amplifiers for specific speakers.
- Dirac Bass Control: The receiver supports Dirac Bass Control, which allows for precise tuning and optimization of bass response, especially when using multiple subwoofers. This feature contributes to a more balanced and impactful low-frequency performance.
- Speaker Configuration:
- Klipsch Optimized Mode: The receiver offers a special Klipsch Optimized Mode, allowing users to fine-tune the receiver’s settings to match Klipsch Reference and Reference Premiere speakers. This tailored configuration ensures optimal synergy between the receiver and compatible Klipsch speakers, enhancing the audio experience.
- Dirac Live Room Correction:
- Full Dirac License: The TX-RZ70 includes a full Dirac Live room correction license, which is a valuable addition for optimizing audio performance in a room. Users can conduct Dirac measurements and apply corrections to achieve precise audio calibration, improving sound quality.
- Customization and Personal Presets:
- Personal Preset Key: The receiver features a Personal Preset key that allows users to save their preferred sound mode and volume level for quick access. This customization enhances the user experience, enabling easy switching between preferred settings.
In conclusion, the Onkyo TX-RZ70’s flexibility in configuration is one of its standout features. It accommodates a wide range of audio and home theater setups, making it suitable for users with diverse preferences and system requirements. Whether you seek a multi-zone audio setup, advanced speaker configurations, or precise room calibration, this receiver offers the flexibility needed to create a tailored and immersive audio experience.
Abundance of Options
The TX-RZ70 offers an abundance of control options. The Onkyo Controller app and TV interface, as explored in the TX-RZ50 review, make the operation sleek and intuitive. With ten basic options that lead to advanced settings, users can easily navigate and customize their audio experience. Features like separate channel level adjustments, Dirac filters, and dialogue enhancement are easily accessible. The Personal Preset key allows you to save and recall sound modes and volume levels with a single button press. The TX-RZ70 includes a full Dirac license, a significant advantage over some competitors.
The Onkyo TX-RZ70 boasts an impressive abundance of options, providing users with various features and settings to customize their audio and home theater experience. Here are some of the notable options that make this receiver stand out:
- Streaming and Connectivity Options:
- Play-Fi Platform: The receiver utilizes the Play-Fi platform, which offers extensive streaming capabilities. Users can access and stream music from various sources, including streaming services like Spotify, Pandora, and Tidal. It also allows for high-resolution audio streaming, delivering excellent audio quality.
- AirPlay 2 and Chromecast: The TX-RZ70 supports AirPlay 2 and Chromecast, making streaming audio content from Apple devices and other compatible devices easy. This ensures seamless integration with different ecosystems.
- Bluetooth: Bluetooth connectivity allows users to wirelessly stream audio from smartphones, tablets, and other Bluetooth-enabled devices. It offers convenience for quick and easy playback.
- Roon Ready (Future Update):
- The receiver is Roon Ready, although this feature may require a future update for full functionality. Roon is a popular music management and playback software known for its high-quality audio streaming. Once activated, users can enjoy Roon’s extensive music library management and control features.
- Klipsch Optimized Mode:
- The inclusion of Klipsch Optimized Mode is a unique feature that allows users to tailor the receiver’s settings specifically for Klipsch Reference and Reference Premiere speakers. This optimization ensures an ideal synergy between the receiver and compatible Klipsch speakers, enhancing the audio performance.
- Video and HDMI Flexibility:
- HDMI 2.1 Support: The receiver features HDMI 2.1 compatibility on most of its HDMI inputs and outputs, accommodating the latest video and audio formats. This particularly appeals to gamers and home theater enthusiasts looking to utilize advanced gaming consoles and high-resolution displays.
- HDMI Zone 2: HDMI Zone 2 functionality allows users to send video and audio from a different source to a second zone or room. This feature enables simultaneous video playback in multiple areas of the home.
- Zone Configuration:
- The TX-RZ70 supports multi-zone audio, permitting users to play distinct audio sources in separate zones or rooms. This is useful for creating a multi-room audio setup catering to different listening preferences throughout the home.
- Dirac Live Room Correction:
- The receiver includes a full Dirac Live room correction license, a valuable tool for optimizing audio performance in various listening environments. Users can conduct precise measurements and apply corrections to achieve balanced and superior sound quality.
- Personal Preset Key:
- The Personal Preset key allows users to save their preferred sound mode and volume level for quick and convenient access. This feature enhances the user experience by enabling swift switching between personalized settings.
- Dirac Bass Control:
- Dirac Bass Control is a feature that assists in fine-tuning and optimizing bass response, especially when using multiple subwoofers. It contributes to achieving a well-balanced and impactful low-frequency performance.
- Advanced Controls and TV Interface:
- The Onkyo Controller app and TV interface provide intuitive and user-friendly controls. Users can easily access and adjust settings, including surround codecs and streaming options. The TV interface is visually appealing and designed for practical use.
- Full Pre-Outs:
- The receiver offers full pre-outs for all channels, enabling users to connect external power amplifiers for individual channels. This feature is valuable for those seeking higher power output or using specialized amplifiers for specific speakers.
In summary, the Onkyo TX-RZ70 impresses with its abundance of options, catering to users’ diverse needs and preferences. Whether streaming capabilities, video connectivity, audio optimization, or customization features, this receiver offers a comprehensive range of options to enhance the audio and home theater experience. Users can tailor their setups and enjoy high flexibility and control.
Connecting the TX-RZ70 to a surround setup revealed its prowess. Whether paired with DALI Rubicon or KEF R Meta speakers, the receiver displayed a knack for handling dynamics and precision. The precision of the Onkyo sound enhanced positioning and clarity during demos of Dolby Atmos content. While the TX-RZ50 offers similar skills, the TX-RZ70 brings more power and control to the mix. This receiver’s controlled nature and speed make it particularly appealing for gaming. It handles dynamic content easily, ensuring that sound effects change position seamlessly, enhancing the gaming experience.
The sound test and sound quality evaluation of the Onkyo TX-RZ70 are crucial aspects to consider when assessing the performance of this AV receiver. Here’s an elaborate examination of the sound test results and overall sound quality:
Sound Test Setup:
- The Onkyo TX-RZ70 was connected to a high-quality speaker system, including floor-standing front speakers, center channel speakers, surround speakers, and ceiling-mounted height speakers.
- Various audio sources were used, including movie soundtracks in different formats (Dolby Atmos, DTS:X), music tracks in high-resolution formats, and gaming content to evaluate the receiver’s performance in different scenarios.
Sound Quality Evaluation:
- Precision and Clarity:
- The Onkyo TX-RZ70 demonstrated remarkable precision and clarity in audio reproduction. Dialogues and vocals were crisp and well-defined, making movie dialogues and music lyrics highly intelligible.
- Sound effects were reproduced precisely, especially in movie soundtracks, contributing to an immersive and engaging listening experience. The receiver’s ability to handle intricate sound details was evident.
- Surround Sound Imaging:
- The receiver excelled in creating a well-defined and immersive surround soundstage. In Dolby Atmos and DTS:X content, sound objects were accurately positioned, providing a sense of dimension and depth.
- Surround effects, such as overhead sounds in Atmos tracks, were convincingly reproduced, enhancing the overall immersion. This was particularly noticeable in action-packed scenes and atmospheric sequences.
- Dynamic Range and Impact:
- The Onkyo TX-RZ70 exhibited a notable dynamic range, capable of delivering soft and subtle sounds and powerful, room-filling audio when required.
- Action sequences in movies benefit from the receiver’s ability to convey impactful explosions, gunshots, and intense music cues. The controlled and impactful bass added weight to these moments.
- Musical Fidelity:
- The receiver showcased musical fidelity and finesse when playing music tracks in high-resolution formats. Instrumental details and nuances were conveyed with clarity and accuracy.
- The tonal balance was generally neutral, allowing for an enjoyable and authentic music-listening experience. The receiver’s ability to reproduce music genres ranging from classical to rock was commendable.
- Gaming Performance:
- In gaming scenarios, the Onkyo TX-RZ70 provided an immersive audio environment. Sound effects, character voices, and spatial cues were well-rendered, contributing to the gaming experience.
- The receiver’s responsiveness to in-game audio changes, such as enemy movements and environmental sounds, added to the competitive edge in gaming.
- Dialog Enhancement:
- Including a dialogue enhancement feature was beneficial when watching content with softer-spoken dialogues. It improved dialog clarity without negatively impacting other audio elements.
- Dirac Live Room Correction:
- The Dirac Live room correction feature played a significant role in optimizing sound quality in the listening environment. It helped address room-related acoustic challenges and produced a more balanced and refined sound signature.
- Bass Control:
- The receiver’s bass control, including the Dirac Bass Control feature, allowed for precise tuning of low-frequency performance. This was advantageous when calibrating subwoofers and optimizing bass response.
- Overall Sound Signature:
- The overall sound signature of the Onkyo TX-RZ70 can be described as detailed, immersive, and well-balanced. It offered a clear and articulate audio presentation across various content types.
- Power and Control:
- The receiver’s robust amplification provided ample power to drive the speaker system effortlessly. Even at higher volume levels, the sound remained controlled and distortion-free.
In conclusion, the Onkyo TX-RZ70 delivered an exceptional sound performance across movies, music, and gaming content. Its precision, immersive surround sound imaging, dynamic range, and musical fidelity made it a compelling choice for home theater enthusiasts and audiophiles. Including features like Dirac Live room correction and bass control enhanced the sound quality and customization options, ensuring that users could tailor their audio experience to their preferences and room acoustics. Overall, the Onkyo TX-RZ70’s sound quality lived up to the expectations of a flagship AV receiver, providing an immersive and enjoyable audio experience.
Conclusion: The Powerhouse TX-RZ70
The Onkyo TX-RZ70 is the pinnacle of the brand’s AV receiver lineup. It offers a compelling package with extensive streaming options, robust amplification, and flexible settings. While it may not match the accommodating nature of Denon/Marantz receivers or the feature-rich offerings of Yamaha, the TX-RZ70 excels in handling and precision, especially in sound effect positioning.
Is it worth the step up from the TX-RZ50? The additional amplified channels simplify building a 7.2.4 setup and eliminate the need for a separate stereo amplifier. Moreover, the TX-RZ70 delivers more power and control, making it capable of driving more demanding speakers.
Reasons to Buy the Onkyo TX-RZ70:
- Immersive Sound: The Onkyo TX-RZ70 offers exceptional sound quality, making it an excellent choice for home theater enthusiasts. Its ability to create an immersive soundstage with precision and clarity enhances the overall entertainment experience.
- Flexible Configuration: With support for up to 11.2 channels, this AV receiver provides flexibility in speaker configuration, allowing you to create a customized surround sound setup. It’s ideal for those who want to build a 7.2.4 system or explore different speaker layouts.
- Dirac Live Room Correction: Including Dirac Live Room Correction software is a significant advantage. It helps optimize audio performance in your specific listening environment, addressing room acoustics and delivering a balanced sound.
- Ample Power: The TX-RZ70 boasts a robust power supply and amplification, ensuring it can easily drive a wide range of speakers. It offers both precision and control, even at higher volume levels.
- Flexible HDMI Connectivity: The availability of HDMI 2.1 ports, including 8K/60 and 4K/120 compatibility, future-proofs your home theater setup. It also allows HDMI switching to different zones, providing versatility in content distribution.
- AccuEQ with AccuReflex: Onkyo’s AccuEQ calibration system, with AccuReflex technology, helps optimize audio performance for your speakers and room, making setup and calibration straightforward.
- Streaming Options: The receiver supports various streaming options, including Play-Fi, AirPlay 2, Chromecast, and Bluetooth, catering to your music streaming preferences.
- Klipsch Optimized Mode: If you own Klipsch Reference or Reference Premiere speakers, the Klipsch Optimized Mode allows you to fine-tune the receiver for optimal compatibility with these speakers.
Reasons Not to Buy the Onkyo TX-RZ70:
- Price: The TX-RZ70 is positioned as a flagship model with a premium price tag. If you’re on a tight budget or don’t require the advanced features it offers, more affordable AV receivers are available.
- Complexity: The receiver’s extensive features and configuration options may be overwhelming for users who prefer a simpler setup. If you’re not interested in customizing your audio experience or don’t have a complex speaker arrangement, a lower-tier receiver may suffice.
- Size and Weight: The TX-RZ70 is a relatively large and heavy AV receiver, which may not be suitable for all home theater setups or AV cabinets with limited space.
- Overkill for Basic Needs: If you’re looking for a basic AV receiver for a small home theater or simple stereo setup, the TX-RZ70’s advanced capabilities and channels may be overkill for your requirements.
The Onkyo TX-RZ70 is an excellent choice for those seeking a high-end AV receiver with advanced features, immersive sound quality, and extensive customization options. It’s well-suited for enthusiasts who want to create a sophisticated home theater experience. However, if you have a limited budget or prefer a more straightforward setup, you may find other, more budget-friendly options that better meet your needs.
If you are interested in AV receivers read our background articles regarding it
Buying and setting up a receiver: advice and tips, Working of HDCP 2.2 on receivers, Placing Dolby Atmos speakers and connecting them to a receiver, An ideal power or wattage of a receiver, Buying a new AV receiver: When is it time for an upgrade? A 5.1 or 7.1 channel home cinema receiver: Which is the best choice? What is the difference between an amplifier and a receiver? What is an AV Receiver: Everything you need to know