Yamaha RX-V671 vs Pioneer VSX-LX504 – that is a question.
The number of channels for receivers is different - 7.1 versus 9.2, respectively, for devices. In terms of power, there are differences, the RX-V671 has such a ratio W/Ohm - 90/8, 150/4, while the VSX-LX504 has a power of 120/8, 230/6. The value of total harmonic distortion is also different, and for the RX-V671 it is 0.09%, but for the VSX-LX504 it is 0.08%.
The manufacturer installed different DACs, the RX-V671 received the model Burr-Brown 192 KHz/24-bit, but the VSX-LX504 is equipped with AK4458 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Yamaha RX-V671 and Pioneer VSX-LX504 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The VSX-LX504 has access to the Spotify service. The number of available streaming services varies for receivers, the Yamaha RX-V671 works with Napster, but the Pioneer VSX-LX504 works with Deezer, TIDAL, Pandora. The quality of 4K/60Hz signal remains unchanged when transmitting from a source to a TV or projector via HDMI for both receivers. Signaling over HDMI in standby mode can provide the RX-V671 and the VSX-LX504. Each of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the VSX-LX504.
The number of HDMI inputs/outputs varies depending on the receiver, the RX-V671 has 6/1, and the VSX-LX504 has 7/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the RX-V671 and the VSX-LX504. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. RX-V671 and VSX-LX504 support the standard HDCP 2.2. Like most receivers, our models have a built-in phono stage for connecting a vinyl player.
Unlike the RX-V671 where 2 Multi zones is provided, the VSX-LX504 works with 3 Multi zones. There is an ECO mode in neither AV receiver. The Pioneer VSX-LX504 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the VSX-LX504. Only in the VSX-LX504 realized a DTS:X surround technology.