Even though the 6000 doesn't use the blackfin, the peq is still really good. Very easy to tune your sound and doesn't seem to add any distortion.
I believe the PEQ and ADI Blackfin DF706 have no relation in the LPGT and the Blackfin is used for DSD reprocessing on the fly to DSD512 i.e. DSD 64/128/256 to the AKM4497EQ Max of DSD512
The LPG and PAW5K/MKII use the ADI Blackfin 514 to run the OS and PEQ/ATE
The LPGT and PAW6000 use the i.MX 6 ARM to run the OS and PEQ/ATE
The LPGT and PAW6000 use the Ingenic x1000 MIPS for Wifi
The LPGT AKM4137EQ is used for it's XRC up-sampling feature. When enabled it is up-Sampling on the fly from any frequency to the AKM4497EQ Max of 768Khz