I took a Pioneer VSX 527 as a replacement, the sound really changed for the better. I didn’t immediately figure out why the sub didn’t work (I had to dig deeper into the setup) and the volume after turning it off from the remote control and turning it on again was reset to 0 (also an option somewhere). With iphone it is controlled and plays, everything is buzzing. The only thing I don’t like is the remote control, it doesn’t glow in the dark, there is no backlight, the pioneer was more interesting. I'll add - I don't like the loud sound when turned off, i. E. if you set a timer before going to bed and did not have time to fall asleep to the music, you will hear a loud click of turning off the device: /
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