Comparison Yamaha RX-V683 vs Yamaha RX-V583

The ability to increase the resolution of the video signal processed by the receiver - if the original video resolution is lower. Depending on the capabilities of the receiver, in particular its HDMI ports, upscaling to Ultra HD 4K and upscaling to Ultra HD 8K may occur.

The principle of upscaling is that a relatively low-resolution video is supplemented with the required number of pixels using special algorithms. Due to this, when playing such a video, the quality of the “picture” is noticeably higher than without upscaling (although somewhat lower than that of content originally recorded in UltraHD). It makes sense to specifically look for a receiver with this function if you plan to use it with a 4K or 8K screen.

Receiver support for HDR technology; this clause may also specify the specific supported HDR format.

HDR stands for High Dynamic Range. This technology allows you to expand the range of brightness reproduced simultaneously on the screen; to put it simply, the viewer will see brighter whites and darker blacks. In practice, this means a significant improvement in color quality: colors are more vibrant and at the same time more faithful than without HDR. However, to use this function, in addition to the receiver, a TV/projector that supports the appropriate HDR format and content recorded in this format is required.

In terms of specific formats, the most popular options these days are basic HDR10, advanced HDR10+, and high-end Dolby Vision. Here are their features:

- HDR10. Historically the first of the consumer HDR formats, less advanced than the options described below but extremely widespread. In particular, HDR10 is supported by almost all streaming services that provide HDR content at all, and it is also common for Blu-ray discs. Allows you to work with a color depth of 10 bits (hence the name). At the same time, devices of this format are also compatible with content in HDR10 +, although its quality will be limited by the capabilities of the original HDR10.

- HDR10+. Improved version of HDR10. With the same color depth (10 bits), it uses the so-called dynamic metadata,...which allows transmitting information about the color depth not only for groups of several frames, but also for individual frames. This results in an additional improvement in color reproduction.

Dolby Vision. An advanced standard used particularly in professional cinematography. Allows you to achieve a color depth of 12 bits, uses the dynamic metadata described above, and also makes it possible to transmit two image options at once in one video stream - HDR and normal (SDR). At the same time, Dolby Vision is based on the same technology as HDR10, so in modern video technology this format is usually combined with HDR10 or HDR10+.

The possibility of using the receiver for simultaneous transmission of signals from different sources to screens and speakers located in different places (zones). For example, in a large house, you can simultaneously stream a movie from a Blu-ray player to a screen in a large room, a TV show to a TV in the kitchen, and a radio programme to speakers in a library. Another option for using Multi-Zone is entertainment centers with several rooms of different types (for example, a cinema hall, a roller skating rink and a cafe).

the maximum sound power that can be delivered by the power amplifier (if the receiver has one, see "Type") per speaker channel. It is worth noting here that in this case it is customary to indicate the so-called RMS (Rated Maximum Sinusoidal), or rated power. Rated is considered the highest power that the amplifier is guaranteed to be able to produce without interruption for an hour without any failures or breakdowns. Short-term jumps in the signal level can significantly exceed this value, but the main indicator is still the rated power.

The power of the amplifier largely determines the sound volume of the speaker system connected to the device. In fact, the loudness also depends on the characteristics of the speakers — sensitivity, impedance, etc.; however, other things being equal, the same acoustics on a more powerful amplifier will sound louder. In addition, this parameter also affects the compatibility of the speakers and the amplifier — it is believed that the difference in the nominal powers of these components should not exceed 10-15% (and ideally, the powers should generally match). And since different rooms require speakers of different power, this also affects the choice of amplifier for a particular environment; specific recommendations on the ratio of room characteristics and acoustic power can be found in special sources.

Also note that if the amplifier can operate with a load of different resistance (see..."Permissible acoustic impedance"), then for different options the power per channel will be different — the lower the resistance, the higher the power. In the characteristics, in this case, the maximum value of this parameter is usually indicated — that is, the power at the minimum allowable resistance.

The number of optical inputs provided in the design of the receiver.

The optical interface allows digital audio to be transmitted and is in fact a variation of the S/PDIF standard using a fiber optic data link (TOSLINK cable). In terms of bandwidth, it is completely similar to the coaxial interface (see above) — in particular, it supports multi-channel audio — however, it compares favorably with its complete insensitivity to electromagnetic interference. On the other hand, due to their design, optical cables are sensitive to sharp bends and mechanical stress — accidentally stepping on such a cable can make it unusable. In addition, they have a maximum length limit of about 6.1 m.

As for the quantity, the presence of several inputs allows you to connect several signal sources to the receiver at once with the corresponding outputs and switch between them through software settings without fiddling with switching cables.

The number of HDMI inputs provided in the design of the receiver.

This interface is one of the most advanced digital standards used in modern electronics. It was originally developed for HD television and already in the first version it allowed to transmit a video signal with Full HD (1920x1080) resolution, accompanied by eight-channel (7.1, see "Number of channels") sound; in the future, the maximum resolution increased even more. Almost all modern TVs, monitors and plasma panels have at least one HDMI interface, the same applies to playback devices (players, media centers, etc.).

As for the quantity, the presence of several inputs allows you to connect several signal sources to the receiver at once with the corresponding outputs and switch between them through software settings without fiddling with switching cables. In the case of HDMI, the abundance of connectors is especially important, given the prevalence of this standard in modern video equipment; in some receivers, the number of such inputs can be up to 10.

The number of composite inputs provided in the design of the receiver.

Note that in this case, we do not mean a full-size composite interface that uses three sockets (video and two stereo sound channels), but only one connector — video. This is due to the fact that the sound can be output through standard RCA audio connectors. The video output also uses an RCA type connector, usually a characteristic yellow colour.

Due to the fact that all image data is transmitted over a single cable, the composite interface is somewhat inferior to the component (see above) in terms of video quality, and the bandwidth allows you to work only with a standard definition signal (not HD); and there is no talk of volumetric sound. On the other hand, this connection method has long been used in video technology and can be useful for connecting outdated devices (such as VHS VCRs).

As for the quantity, the presence of several inputs allows you to connect several signal sources to the receiver at once with the corresponding outputs and switch between them through software settings without fiddling with switching cables.

The number of component inputs provided in the design of the receiver.

This interface (also known as YPbPr) is designed to transmit analogue video. Its name comes from the fact that the three main video components (brightness data and two colour difference channels) are carried over three separate cables. Accordingly, each individual component input is a set of three connectors. Usually, a built-in cable with RCA connectors (“tulip”) is used for connection, while the cables for component and composite (see below) interfaces are quite interchangeable.

The component interface stands out for its high signal transmission quality: splitting the video into three separate channels significantly reduces distortion compared to the same composite format, and the bandwidth is comparable to the above-described HDMI and allows you to work even with HD video. However, a component connection does not provide audio, and you will need to use a separate cable for this purpose.

As for the quantity, the presence of several inputs allows you to connect several signal sources to the receiver at once with the corresponding outputs and switch between them through software settings without fiddling with switching cables.

The presence of the Phono input in the design of the AV receiver.

This type of input is used to connect turntables. Despite the widespread popularity of digital media, classic vinyl records do not leave the scene. And it's not just a matter of nostalgia: many audiophiles believe that it is the record that provides the most authentic and complete sound, which is why turntables for vinyl are quite often found in high-end audio systems. However, the sound from such a player must be passed through a phono stage, otherwise there can be no question of any quality. For these purposes, in high-end equipment, including AV receivers, the Phono input is provided: the signal received at this input is fed to the built-in phono stage. This allows you to connect turntables directly, without additional external equipment.

Note that phono stages can be designed for different types of pickups — MM or MC; therefore, before connecting, check to see if the Phono input is compatible with your turntable's cartridge. However, many receivers with this function are equipped with a universal MM/MC phono stage.