Originally Posted by countryWV
The source material feeds only 1 LFE signal to the AVR. The AVR internally splits that 1 LFE signal into 2 outputs. From this point Audyssey takes that 1 LFE signal from 2 outputs and EQs them independently creating 2 distinctive LFE channels. Without Audyssey doing this it would be 1 LFE signal split into 2 outputs like your friends older Onkyo. The newer higher $$$ models have a more advanced Audyssey that allows it to EQ 2 subs independent of each other.
IMO Audyssey is creating the 2 distinctive LFE channels while the AVR just splits the same LFE signal internally to give 2 outputs. How Audyssey handles it from there would be equal to what the MiniDSP does to it after the fact.
I may be using the word "channel" instead of "signal"
Please correct any of the above incorrect information if needed. This is just an early Sunday morning Guess.
Actually Audyssey doesn't EQ them separately. It pings them separately for setting the correct distances for each one individually. It then EQ's them as one. Or better said Audyssey only EQ's the LFE channel once, there is not separate EQ filters for each set of pings.
Looks like you beat me to it RMK
This is the correct information though. Before I made my way into the higher end JTR forums I spent quite a bit of time learning Audyssey and a few other things
Chris from Audyssey describes the XT32 with SubEQ in my Integra SSP as follows:
Yes, the SubEQ HT function in the 80.3 will measure each sub individually first to determine any level and distance (phase) differences between them. It will apply these corrections and then measure them together as "one" sub to apply the room correction filter.It is MultEQ that is in charge of creating the filters and it will look all the way down to 10 Hz. If it finds usable response down there then it will apply correction down to 10 Hz. July 11, 2012 04:13 pm
So to clarify, after distance and level settings are done independently, the subs are EQ'd as one. EQ filter settings are not applied to each channel as they would only be over wtitten by the combined measurement filters anyway.