The SC-LX801 and SC-LX701 both have 9 amplifier channels and support up to 2 powered subwoofers. This means that they are capable of running a 7.2.2 or 5.2.4 channel Dolby Atmos speaker setup without the need of an external amplifier. There is a difference in terms of the power output of the SC-LX801 and SC-LX701. With 2 channel driven into 8 ohms loads at 1 kHz with 0.08 % THD, the SC-LX801 is rated at 140 Watts per channel whereas the SC-LX701 is rated at 135 Watts per channel. The SC-LX801 and SC-LX701 have 11 speaker terminals but only up to 9 can be powered simultaneously. There are 11.2 channel pre-outs (in addition to dedicated pre/line-outs for Zone 2 and 3) on both the SC-LX801 and SC-LX701 so you can connect an external 2 channel amplifier in order to have a 7.2.4 channel Dolby Atmos speaker setup, for example. The SC-LX801 and SC-LX701 also support bi-amping connections. If you don't use an external amplifier, and have multiple speakers connected via bi-amping, then the SC-LX801 and SC-LX701 can run at maximum a 5.1 channel speaker setup (5.1.2 channel in case of bi-amping only the front two speakers). Another difference between the SC-LX801 and SC-LX701 is that only the former has an AIR Studios Sound Tuning certification.
The SC-LX701 omits the custom bypass capacitors that can found on the SC-LX801. As a result, the ability for augmenting the advantages of the Class D3 (Direct Energy High fidelity class D) amplifier is more limited on the SC-LX701 in comparison to the SC-LX801 but only some subtle details in the sound are affected by this. Both the SC-LX801 and SC-LX701 utilize a linear circuit layout for their Class D3 amplifier which reduces the distance the signal has to travel, hence the improvement in the sound quality.
The amplifier circuit design is slightly different on the SC-LX801 vs SC-LX701. Specifically, the small signal section is separated from the high power section on the SC-LX801 in order for any mutual interference to be avoided. As a result, the SC-LX801 is able to transmit clear signal the Direct Power FET whereas the SC-LX701, due to the lack of separation between the operational amplifier integrated circuit and the FET Driver IC, is somewhat prone to residue noise from the high power section, especially when you consider that the SC-LX701 also lacks the Rubycon chip film capacitor that is utilized by the SC-LX801. The Direct Power FET, however, is connected directly to the PCB (printed circuit board) on both the SC-LX801 and SC-LX701, meaning the switching times are identical so both receivers are able to deliver quick-responding sound.
Owing to the 3D Space Frame Construction, which is aimed at enhancing the mechanical grounding properties of the chassis, the SC-LX801 is less prone to interference caused by mechanical resonance in comparison to the SC-LX701 which omits the 3D Space Frame Construction. That being said, the Insulated Dual Chassis is used in both the SC-LX801 and SC-LX701 for the purpose of electrically separating the processing (pre-amp) block from the main chassis that houses the power amp section by using special insulators between the two chassis. Furthermore, the power amp block is being shielded by steel plates on both the SC-LX801 and SC-LX701, so that there is no interference between the pre-amp and the power amp.
The SC-LX801 and SC-LX701 each have 7 rear and 1 front HDMI inputs, in addition to 2 HDMI outputs located at the back. It should be said, though, that only five of the seven rear HDMI inputs support HDCP 2.2 and can accept HDR10 signal. The HDMI IN 6-7 as well as the front HDMI input on both receivers have limited bandwidth (compared to HDMI 2.0 ports) and are compatible only with HDCP 1.4. When it comes to Dolby Vision pass-through, both the SC-LX801 and SC-LX701 require a firmware update which has already been released but it has to be manually installed via USB. Furthermore, Dolby Vision pass-through is possible only on HDMI IN 1-5, provided you've updated the firmware on either the SC-LX801 or SC-LX701.
Check availability and pricing on Amazon.com for the SC-LX801 and SC-LX701 (affiliate links; As an Amazon Associate I earn from qualifying purchases.)
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