Jumping in on this thread.
I am currently looking around for a truly all digital amp like the xr-55 or some such.
I have been looking at the super cheap panasonic HTIB SC-BT etc. I only need 2 optical inputs and a way to play Blu-Ray which these do. Obviously they are missing a lot of funtionality, but are they true TDAA or equibit or purepath etc?
Example: SC-BT200 http://service.us.panasonic.com/OPERMANPDF/SCBT200.PDF
I am not an audiophile and don't really have any experience in home audio so I am completely open. But the simple arguement of removing analog parts from the signal path until powering the speakers seems to be both logical and desirable.The reason I am looking into the true digital amps is because I was recommended them as being highly cost effective, superb sounding amps when only using digital inputs. I will not be inputting any kind of analog signal.
I am building BFM designs, a THT subwoofer, TLAH mains and SLA center. Haven't decided on surrounds yet. These speakers are highly efficient with 96+Db SPL on the mains and 92+ SPL on center. Sub is 105+ Db corner loaded. So I really don't need much power output. For 75db levels from my mains I need like .01 watts or some such. Not overall very taxing really....
This is my first foray into 5.1 and I won't be aiming for 7.1 any time soon. I will be supplying input from 2 S/PDIF (tv and HTPC) and using the built in blu-ray player or blu-ray over the computer. I don't know a lot about all the movie audio formats, but I doubt i will need (or hear a difference) in the high quality ones, as I have no purpose built theater room or 7.1 I am just worried about a lack of EQ as the sc-bt series do not have graphic eq. What is the best format that will run over S/PDIF as I know there is a limitation in bandwidth in S/PDIF?
I am going to ring Panasonic tomorrow and hopefully find out what the built in high pass/low pass cross over is for the subwoofer. I am afraid it is going to be high and unchangeable though. I am aiming for 80hz 3rd or 4th order for my planned setup. These HTIB power the sub from the receiver which would be a cost effective solution as well. There is no way to integrate a sub plate amp.
Would anyone recommend any other solutions like this? Australia (where I live) does not seem to have a used market for the old panasonics otherwise I'd probably settle for one of them.