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It's done differently in different units, and is the main difference between the 25 and 45 (I though this had all been covered before....). The XR10 and XR45 appear to have variable-output switch-mode supplies, which provide about ~20dB of level control. These units reduce volume by lowering the output voltage of the PS. Once the PS is at it's lowest output, the units then use digital attenuation on the input word to achieve volume control. On the 25, there is only a fixed power supply, so all volume control is done in the digital domain.[/code]
The SA-XR50 does use the TAS5076.The SA-XR45 uses the TAS5036A not the 5012. I do not know for certain what the SA-XR25 or 10 uses.
The SA-XR25 and 45 use 3) TI TAS5182X1 chips in the audio section to supply the switching mosfets. The SA-XR50 only uses 2 of the TI TAS5182 chips. For the front channels there are quite a few small chips and surface mounted components in place of a single TAS5182. The switching mosfets are the same in all channels as are the output filters.
DBX???????? Remastering??????? You really DON'T have good ears do you. Jesus aren't there "audiophiles' here?
Actually my ears work fine, and my brain does too in that I can tell when something sounds better without letting emotion or nostalgia interfere. I used a nice Fisher stereo tube amp for years before recently discovering the Panasonic XR series receivers. Anyway...When you consider the lousy dynamic range of some albums the DBX 3BX does a nice job of bringing out some detail IF you use it judiciously (lightly). On an old Tony Bennett album on CBS (from the 60s) with the DBX unit in the loop ol ...
But it is there... In the mastering process of an LP the quiet passages are boosted to get them above groove noise and the loud passages are reduced to allow proper tracking by the stylus. Units like the 3BX just make an attempt to push the ends back out to approximate original dynamic range. It ain't perfect, and as I said you can overdue it, but the information IS there. 'Nuff said.
Sounds like "Beatles is a self proclaimed expect on ....let's say everything?! Let's focus on more substance and less egoism, out of consideration for the rest of the members.