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Comparison Table Terminologies Explained Below
SRP: (Suggested Retail Price) is the price a manufacturer or distributor suggests Retailers sell the product for. Intended as a guide and is not compulsory.
MARKET PRICE: The price an item can be bought for 'today', also called the 'current' or 'going' price.
POWER: Power is measured in watts but what does it really mean? FACT: Power is a meaningless way to compare the loudness potential of one AV Receiver vs another. Sure - the more power you put into a speaker the louder it plays but more watts does not mean better sound. Forget the various ways manufacturers choose to express power, instead check out the weight. Power is heavy! ...actually the stuff used to make power is heavy. Eg: A 5kg amplifier has as much chance of pumping out 1000 watts as you do and an 18kg amplifier will smash an 8kg model. Look under the hood of a high-end amp or pricey A/V Receiver and you see a massive (heavy) transformer. Powerful amps need big transformers to pull more power from the wall outlet, and good transformers are heavy. A 'lightweight' AV Receiver will not come close to delivering it's spec-ed power into seven channels. Most will not manage one third of their claimed wattage. So, if you live in a large house or have older speakers that need oodles of power, pony up and buy a heavy AV Receiver. Even if it's just the occasional party where you really want to blow off some steam, buy 'heavy'. When in doubt, go for more, and don't worry about damaging your speakers with too much power. Fact is, more speakers get fried by underpowered amps than by Godzilla power amps. In other words, you're more likely to "blow up" a speaker with a 15 watt amp than a 250 watter.
CHANNELS: AV Receivers can have 5, 7, 9 or 11 channels. 5 channels is most common and usually referred to as 5.1 being left and right (1 + 2), center (3) left rear surround (4) and right rear surround (5). The ".1" refers to the Subwoofer channel on the AV Receiver.
HDMI 2.0: This was released in 2014 and had numerous changes over the former 1.4 version. HDMI 2.0 keeps all features & support from previous versions, plus adds 3D and Audio Return Channel (ARC). With the TV industry now fully into UHD (Ultra High Definition or 4K) more bandwidth is needed via the cable to handle higher resolutions and frame rates. HDMI 2.0 supports "4K" allowing for 4K 3D, along with higher-frame-rate 2D content such as computer games. Basically HDMI 2.0 increases the size of the "pipe" transmitting data from the source (like a Blu-ray Player or PC) to your TV. To enjoy these features a cable upgrade is necessary.
HDCP 2.2: (High Definition Content Protection)...2.2 is the latest evolution designed to create a secure connection between a source and a TV. This is so you can't make a copy of the content. HDCP creates encrypted keys between the source and display (called 'the sync'). Enabled devices like an ONKYO AV Receiver can be in the chain. The source and the 'sync' need to 'agree' or no content gets transferred. If you've ever hooked up gear and gotten a blank screen then the HDCP "handshake" is usually the issue.
STREAM READY: A good example of the "Streaming Stick" is the Google Chromecast USB Device. Available from retailers like JB HiFi for around $60 they are a small Streaming Device that plugs into an HDMI Port on your ONKYO AV Receiver. You can then use your Smartphone to 'cast' your favourite entertainment (like You Tube videos) onto your TV. Not all brands of AV Receiver are compatible with this type of Device so it pays to check first.
HDMI UPCONVERT: Some AV Receivers can convert from one video format to another. This is called Up-Conversion. You can then take an an analogue video signal (eg: Composite or Component) and 'Up-Convert' to HDMI. This is a great feature for people who still own the 'old' Sky Decoders or still have a VCR.
AUDIO RETURN: This uses a single HDMI connection to send audio from a TV to the AV Receiver.It simplifies your system & reduces the cables you need. With 'ARC' you send video to the TV with an HDMI cable, and that same HDMI cable sends audio from the TV back down the same cable
OPTICAL INPUTS: Optical cable can pass digital audio from one device to another. It is better than analog (the red and white cables). Depending on your gear, you might not have the option for HDMI ...in that case, optical is fine. Don't sweat not being able to connect with HDMI. For most setups, the sound will be just as good with optical as with HDMI.
USB INPUTS: A USB connection lets you connect an iPod or USB Drive. In addition a good receiver will bypass the iPod's or connected Device's digital-to-analog converter (DAC) when using the USB connection. This enables the receiver to use its own higher quality DAC as well as built-in processing capabilities that restore fidelity lost in many compressed file formats and give you better sound quality.
WIFI: This a wireless networking technology that allows electronic devices to network, mainly using the 2.4 gigahertz and 5 gigahertz radio bands. The term "Wi-Fi" is a synonym for 'WLAN' as in Wireless Local Area Network and is a trademark of the Wi-Fi Alliance. The "Wi-Fi Certified" trademark can only be used by Wi-Fi products that successfully complete Wi-Fi certification testing. Many devices Wi-Fi like smartphones and tablets and in our case Onkyo AV Receivers. A WiFi enabled device can connect to a network via a Router and have a range of about 20 meters indoors and more outdoors. This will also allow remote control the AV Receiver via an APP. Wi-Fi is less secure than a wired connection such as an Ethernet Cable.
BLUETOOTH: This is like a radio-wave technology for communicating over short distances. Most Smartphones and Tablets have Bluetooth as it is a convenient way to transfer music to your AV Receiver. The benefit of Bluetooth in an AV Receiver is anyone with an Bluetooth device can connect with your AV Receiver to share their music. A small downside for Bluetooth is it can not transfer as much data as WiFi or AirPlay and therefore 'compresses' files which results in lower quality sound compared to WiFi & AirPlay.
D/A CONVERTER: Also called a 'DAC' it allows you to play music from a "DIGITAL" source such as iPhone, Tablet or PC. Speaker Cable can not transfer a digital signal so the DAC converts the music file into analog so it can travel through speaker cable to your speakers. When in an AV Receiver the DAC takes the digital signal, converts it into an analog signal so it can then be fed into the Amplifier and onto the speakers. The benefit of a 'DAC' is improved Sound Quality and Volume.
When a DAC is noted as 192/24 what do the "two different numbers mean?" eg: 192 (first number) then 24 (second number)
The first number (192) is the "Sampling Rate"...Sampling rate determines the quality or accuracy of a digital recording. It defines the number of samples per unit of time (usually seconds) taken from a continuous signal to make a discrete signal". For time related signals the unit for sampling is call 'Hertz'
The second number (24) is the "Bit Depth" or Resolution...Bit Depth describes the number of bits of information recorded for each sample. The less bits, the more "grainy” the reproduction of sound will be. The more bits, the more accurate accurate the sound. 16 bit is the standard resolution for CDs and is generally acceptable for analog to digital recording. 24 bit or even 32 bit gives you a cleaner sound and more accurate representation. The more 'bits' means your AV Receiver will have a better quality quality processor built in. Music Lovers Tip! ...You want your equipment to playback music in the most transparent way possible. For this reason go with the best 'DAC' you can afford.
WEIGHT: As noted in the POWER explanation above the weight is significant when comparing to amps that are a similar price and / or specification. If one a is a lot lighter such as 7kg vs 9 kg then look closer at teh heavier model as it is more likely to have the better quality amplifier and therfore more power.
Dynamic Audio Amplification
Smooth Analog SignalOnkyo developed Vector Linear Shaping Circuitry (VLSC) to reassemble the audio signal to its original form following processing. Unlike conventional filters, VLSC removes pulse noise generated in D/A conversion, allowing the sound wave to be reproduced with extremely high fidelity for a smooth analog signal.
Multi-Zone AudioThe TX-NR555 Powered Zone 2 brings audio to speakers connected to the receiver into a second room. With the dedicated Zone 2 DAC, you can send internet audio sources to your second listening zone.
Supports Dolby Atmos® Up to 5.1.2 ChannelsDolby Atmos moves sound around you in three-dimensional space, so you feel like you're inside the action. The TX-NR555's Dolby Atmos decoding transports you from the ordinary into the extraordinary.
Sound designers and artists mix in a 3D space, steering effects through surround channels and adding a seamless overhead dimension with discrete height channels.
Additionally, the Dolby surround up-mixer processes content not mixed for Dolby Atmos to fill the flexible speaker layouts of a Dolby Atmos system.
DTS:X ReadyDTS:X is an object-based surround sound technology that includes height channels for a fully-immersive listening experience. DTS:X provides listeners flexibility, immersion, and interactivity. You will be able to personalize your audio experience, for example, by turning up JUST the dialog within a mix. DTS:X allows you to customize to your room layout as well as control dialog and dynamic range.
4K UltraHD Video PerformanceThe TX-NR555's HDMI specifications and HDCP 2.2 compatibility support the latest formats being released by Hollywood. The latest HDMI specs offer a significant increase in bandwidth (up to 18Gbps) to support new features such as 4:4:4 color space and 4K@50/60 (2160p), which is 4 times the clarity of 1080p/60 video resolution. The TX-NR555 enables transmission of High Dynamic Range (HDR) formats, and provides enhanced picture quality by simultaneously enabling greater detail for both the dark and bright parts of an image.
The TX-NR555 also effortlessly upscales 1080p video to stunning 4k UltraHD.
Bluetooth / Wi-Fi® with Pandora, Spotify, and AirPlayThe TX-NR555 has AirPlay, Wi-Fi and Bluetooth technologies built in. Stream virtually any audio from a smartphone, tablet or PC to your home theater for powerful sound.
With Spotify, Pandora, and TuneIn built-in, you can select a station and search for music available on these services via the Onkyo Remote app on your phone. The free Onkyo Remote app puts a range of streaming options at your fingertips, from universal hi-res audio via network-attached devices to internet streaming services to music on your smartphone and tablet. Further, Tidal and Google Cast will be operable with an upcoming firmware update.
384 kHz/32-bit Hi-Grade DACNo matter what you're listening to, it will sound powerfully full, clean and clear. A premium-quality AK4458 digital-to-analog converter from Asahi Kasei implements unique low-distortion filtering technologies for clear sound, and unlocks the full potential of any audio format, including compressed, lossless, and hi-res audio (MP3, WMA, WMA Lossless, FLAC, WAV, OggVorbis, AAC, Apple Lossless, DSD 5.6 MHz, LPCM, and Dolby TrueHD).
AccuEQ adds AccuReflex for 2016AccuEQ conducts two measurements- one to set the level, distance and crossover for ALL speakers, including the subwoofer. Choose to include or bypass EQ measurement for front left and right speakers, and choose to automatically or manually set the EQ. Further, you can save your own manual EQ settings into three available presets.
The new AccuReflex technology aligns the phase of upfiring "height" speakers with the sound coming directly from your other speakers. Any delay is resolved so that everything arrives at your ears at the same time. The result is cohesive reproduction of object-based soundtracks.
FireConnect™ Multi-room AudioA firmware update will enable any audio source connected to the receiver (from vinyl to streaming audio) to be sent wirelessly via FireConnect Powered by Blackfire to an optional speaker* placed anywhere in your home. Stable, fast, and easy to control with a mobile, it’s the smart way to set audio free.
FireConnect™ is a technology developed by Blackfire Research. Multi-room audio enabled by this technology requires an optional Onkyo wireless speaker scheduled for release in summer 2016. Onkyo cannot guarantee the compatibility of its A/V receivers with other devices featuring FireConnect™. Please consult the Onkyo website for further announcements regarding these technologies.
- 140 W per Channel
- Dynamic Audio Amplification for Clear & Realistic Sound
- VLSC for Front Channels
- DTS:X™ Ready and Dolby Atmos® Support
- HDMI® 6 In / 1 Out
- Powered Zone 2
- 4K UltraHD / HDR / HDCP 2.2 / 4:4:4 Color Space
- Built-in Bluetooth & Wi-Fi® with Pandora, Spotify, and AirPlay
- DSD 5.6 MHz, FLAC 192 kHz/24-bit Hi-Res Audio Capable
- 384 kHz/32-bit Hi-Grade DAC
WARRANTY FOR THE ONKYO TX-NR555 ONE (1) YEAR FROM DATE OF PURCHASE