As for the digital output, try changing the optical fiber cable or using the coaxial cable.
P.S., maybe your center and subwoofer are connected backwards. Look at the interface. . It is recommended to use the CD with 5. 1 channel test.
Regarding DTS-ES, I want to explain that there are few power amplifiers supporting DTS-ES. . . AD-9200N also does not support DTS-ES, so it can only support the decoding of DTS core of DTS-ES, and what it hears is only 5. 1 channel. . .
DTS-ES is a 6. 1 channel audio expansion technology, which has the DTS-ES matrix with the same coding method as Dolby Digital EX, that is, the rear center channel is mixed in the left and right surround channels, but the 6. 1 channel is coded as 5. 1 channel, and the 5. 1 channel can be coded as DTS-. There is another one, dts-esdistrrete, which is different from Matrix. The rear center channel is independently coded. This coding method is really 6. 1 channel coding. However, DTS-ES discretization has a disadvantage, that is, it does not support the sound source of DTS 96/24: 96 kHz/24 bit. Even 6. 1 can only be encoded into DTS-ES matrix, and Distrete can only support the output of 48kHz/24bit.
As for your supplementary question, if you want to switch to 7. 1 channel amplifier, pay attention to giving priority to Dolby's TrueHD, Digital Plus/EX, Pro Logic IIx (IIz is better), DTS-HD Master Audio, DTS-ES, DTS 96/24, DTS Neo:6 (Neo:X is better). And HDMI 1.4 with 3D display input and output functions, such as Joan TX-SR 308 (above 508, 608, 708, 808, etc. ), Tianlong AVR-1311(161,1965438. Pioneer VSX-520 (above 820, 920, 1020 and other new generation power amplifiers. ) and Yamaha RX-V467 (above 567,667,767,867, etc.). ), after all, the Blu-ray market has gradually expanded to China. Of course, if you want to make it in China, you prefer Tianyi. Tianyi AD-7 100 is also a good choice, but the price is too high. After all, it is still a set of front and rear dual amplifiers (AD-7 100HD front stage and AD-7 100PA rear stage)-at the same price, you can only buy amplifiers from brands such as Qiao 'an and Pioneer.
Also note: some next-generation power amplifiers on the market do not have karaoke function, so if you want to have both next-generation audio decoding (including Dolby TrueHD and DTS-HD Master Audio) and karaoke function, you should choose next-generation power amplifier+karaoke reverberator (karaoke has only 2.0 analog outputs to the power amplifier). Or choose a Blu-ray player with 7. 1 channel analog output and supporting DTS-HD main audio decoding output (most like Oppo BDP-93, Philips BDP7500S2, BDP9500P, etc. ) and connect it from the 5. 1 analog output of the original 5. 1 power amplifier to the 5. 1 input. Connect an optical fiber (although DTS 5. 1 channel karaoke can be used, the sound quality of DTS-HD and TrueHD will definitely be degraded. After all, it is analog output: it is said that the analog signal transmission after DTS-HD and TrueHD decoding has the same sound quality as DTS optical fiber transmission).
There is also a SAV-899R from Shanling. Although it does not support the next-generation audio decoding and HDMI functions, it is already the most common domestic 7. 1 channel non-next-generation power amplifier-the only drawback is that it does not have the next-generation audio decoding and HDMI input and output functions, and other functions are readily available. Including 7. 1 analog input connected to the computer to play blue light (at present, analog output is the best way for the computer to output high-definition audio, and the HDMI output function is not yet complete), DTS-ES 96/24 decoding, HDCD decoding, professional karaoke function and AB-level HiFi power amplifier output. I don't know if this cheap power amplifier can be bought now. . .