I myself have never been an ardent admirer of cinemas for home (I prefer to visit public), and I only encountered AV receivers because of working in Pult, so the task was relatively uneasy. The purchase budget was limited to 50,000 rubles, which also complicated the choice.
After a fortnightly gnawing into the datasheets and consulting with our AV specialists, I opted for the Denon AVR-X2400H. The device impressed me so much that I decided to do a little review. I will try to express my enthusiasm without pathos, excessive subjectivism and sugary "jeans." If you are wondering what exactly impressed me, welcome to the cat!
By the way, most recently I published a post about how to choose AV receivers.
The first task was to choose a device with high sound quality, sufficient power and capabilities that fully provide multi-channel sound. Naturally, I wanted something promising in terms of using surround sound, and accordingly my choice fell on devices using progressive decoders, in particular Dolby Atmos and DTS-X – surround sound technologies, which are the most promising at the moment. In addition to these relatively fresh delights, the AVR-X2400H supports almost all current standards from Dolby and DXT (DTS-HD Master Audio, Dolby TrueHD, Dolby Digital, Dolby Digital Plus, etc.).
The speed of sound iron, The operation of digital modes is ensured by the use of a 300-MHz 4-core DSP processor that is capable of operating at a rate of more than 1 billion operations per second, which is more than enough to process the sound.
The basic acoustic parameters of the receiver fully correspond to its counterparts in the price category. So the level of harmonic distortion does not exceed 0.8% (20 Hz – 20 kHz). Unfortunately, the datasheet does not indicate the level of IMD, however, judging from the subjective assessment, there are not many of them. Blind tests with similar devices similar in price did not reveal any significant differences, which is typical for receivers with a relatively flat frequency response.
The power of the receiver is 100 W per channel at 8 Ohm load is more than enough for full-scale scoring of 50 square meters. Meters. For comparison, with a 4 Ohm load, the power (RMS) is 150 watts per channel. The reproducible frequency range is far beyond the limits of human perception – from 10 to 100,000 Hz with an uneven response in the range of + 1 / -3 dB. According to subjective sensations, the level of IMD is also not great, which is relatively rare for this class of devices. And one more less significant, but pleasant nuance: a signal-to-noise ratio of 100 dB. The above data indicate that the receiver's characteristics far exceed the standards of the HI-FI standard.
An interesting feature of the system is the presence of a second output for the subwoofer, which is especially useful when listening to traditional stereo, and also allows you to create a more distinct lowpass
And one more thing, to apply the purchase with the existing 5.1 system, there was a question of buying a ceiling and other additional acoustics to make full use of Dolby Atmos. The classical variant with a ceiling was decided not to be applied, given the complexity of such an implementation in our conditions. They stopped at the Heco AM 200 installation option, which are installed on the logs and reflect the sound from above at the expense of reflection from the ceiling.
When using only 5.1 sound, the receiver can be used as a simple multiroom device . The two remaining channels can be used as a stereo pair for the second room.
A useful opportunity is the use of biamping.
The main wireless interfaces of the AVR-X2400H are Wi-Fi and Bluetooth. For stability of work in the given radius of reception / transmission the manufacturer has provided two RF antennas. There is integration with AirPlay, as well as with streaming services Spotify Connect, Pandora, Sirius XM. The first was especially important, since my brother is an incorrigible brand-independent user of Apple products.
The data stream from the network storage is also implemented. In other words, the receiver can act as a full-fledged network player. In addition to WI-FI, network integration can be provided using the RJ-45 Ethernet LAN port.
Mobile management is carried out using the Denon 2015 AVR Remote application (Remote App), which is equally convenient for iOS and Android versions. Compatibility with Mac and AP is provided using the DLNA 1.5 specification.
The device is equipped with eight HDMI inputs, one of which is located on the front panel, and also has two HDMI outputs. To put it bluntly, this search for the conditions in which we planned to use it, we would have had enough of four. But no one knows what will happen tomorrow, and maybe someday we'll need this "HDMI" abundance, especially since this, in all likelihood, did not greatly affect the price of the device. All HDMI inputs support 3D.
Video processing, adaptation, deinterlacing, calibration
Personally, I'm quite critical about 4K resolution, sincerely believing that Full HD is quite sufficient for home viewing conditions, which can not be said about my brother. With his ultimate view of things, it was necessary for the receiver to support the standard BT.2020 4K Ultra HD (3840×2160, HDR, Wide Color Gamut), could "turn" into 4K a picture from old kind DVDs and a TV signal.
The AVR-X2400H's graphics processor provides the ability to process video streams at 60fps (60pps) in / out and is able to enhance the quality of an analog signal with SD sharpness parameters up to 4K resolution.
The Denon AVR-X2400H supports all existing ISF calibration functions, as well as the ISF Day and ISF Night modes. Quite frankly, both me and my brother did not care much about the calibration possibilities, but our experts asked to emphasize this point in the article. These functions and modes are especially important for specialists who are engaged in calibration and are certified to work with ISF.
Buy a receiver and do not repair
Today much is written about the fact that 50% of good sound is the acoustic processing of the room. To some extent, the Denon AVR-X2400H eliminates the need for such processing. The device uses a package of DSP-audio algorithms Audyssey MultEQ XT. The task of DSP-algorithms is to analyze the data about the room, obtained with the help of a microphone, and on the basis of the results to carry out signal processing.
Using the MultEQ XT, the DSP processor processes the signal in such a way as to maximize the harmful effect of room acoustics and get the best possible reproduction of the signal. The conditions in which the use of the receiver was planned are far from ideal and a similar function was necessary for me.
Audyssey MultEQ XT – performs filtering and correction of tonal balance, provides adjustment of frequency characteristics in accordance with the algorithm, built on the basis of data received from the microphone.
Subjectively – the function works, and with its use the system forgives many flaws in the acoustic properties of the room, it nicely reduces the harmful echoes of the first reflections of the MF and HF range. LF resonances can not be completely corrected, although the overall "picture" is definitely better.
I can not say that after using Audyssey MultEQ XT acoustic room treatment will be completely superfluous, but the effect of this thing was really noticeable on hearing and significantly increased the fidelity of reproduction. And the main thing is no lengthy torment with tuning and precise equalization. Everything happens almost instantly.
At a cost of 45,000 rubles, this receiver was able to fully satisfy not only the basic evaluation criteria, but also the ultimatum requirements of a pretentious buyer. The functional capabilities of this device are worth their money, and, perhaps, I can call this device the best in terms of price / quality / functionality.