Pioneer SC-LX901 vs Harman Kardon AVR 1510 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Pioneer SC-LX901 has 11.2 versus 5.1 for Harman Kardon AVR 1510. Regarding power, then SC-LX901 has such a W/Ohm ratio - 140/8, 200/6 when AVR 1510 has a power of 75/8, 75/6. The THD is 0.08% for the SC-LX901 but 0.09% for the AVR 1510.
Characteristics of digital to analog converter (DAC) are different, ESS SABRE32 Ultra 192 KHz/32-bit for SC-LX901 and 192 KHz/24-bit for the AVR 1510. Only the SC-LX901 supports Bi-amping feature. The Pioneer SC-LX901 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Only the SC-LX901 has Bluetooth support. Only the SC-LX901 supports Spotify.
Only the Pioneer SC-LX901 has support for High dynamic range (HDR). Compared AV receivers retain the quality of 4K/60Hz signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. The SC-LX901 can scale the input HDMI signal, unlike the AVR 1510. Dolby Vision technology found support only on the SC-LX901.
The Pioneer SC-LX901 has 8/2 HDMI inputs/outputs versus 4/1 HDMI connectors of the Harman Kardon AVR 1510. The HDMI Audio Return Channel (ARC) feature supports both devices. Unfortunately, HDMI eARC is not available on monitored devices. Of the two receivers in our comparison, HDMI CEC is present in only the SC-LX901. Both models support the standard HDCP 2.2. The SC-LX901 has a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is not present in each of the AV receivers. The setup assistant will help you configure Pioneer SC-LX901.
Only the SC-LX901 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the SC-LX901.