Main theater: Pan 54 G10, Onkyo PR SC886, PS3, Carver TFM 45, Emo UPA 7, Polk SDA 2, Polk CSi A6, Polk RTi4 X 4, Velo CHT 10 X 2, APC H15. Bedroom: Sony 40 XBR 4, Onkyo 805, Oppo 980, Emo XDA 1, Emo RPA 2, Polk RTi 10, Polk CSi5, Polk monitor 30 X 4, eD A5s-300 X 2, Belkin PF60. Matrix M stage, AH D2000, HD 650, ATH-M50, ER-6i MY GEAR@ s572.photobucket.com/albums/ss165/a1adjz/Gear
Post by paintedklown on Dec 5, 2010 13:18:10 GMT -5
I read that as well Radtech.
My guess is that since the XDA-1 is only outputting volts, it doesn't matter a whole lot what you have the volume set at, so long as you are running it to a good pre-amp. The same signal is being sent either way. I am sure there are probably cd players and things out there that put out very low voltage signals and still sound great. They just require a larger gain from the pre-amp is all.
NOTE: My above answer is purely a guess based on my understanding of gain stages between components. If I am incorrect, someone please correct me. Thanks.
I called Emotiva on Friday and asked Vincent that same question. He said that I should run the XDA at full volume, leaving it at 80, and use the USP-1 to make volume adjustments while listening. When I mentioned the high gain on the USP-1 he said that the XDA could be set lower if needed, as it was a "lossless" volume control and would not cause any loss of resolution, detail, etc. So, I have been using the XDA set at about 60 - 70 and I use the USP-1 for volume adjustment. I do occasionally grab the XDA remote for fine volume adjusments when needed - since one push of the button on the USP-1 remote turns it up or down so much. Seems to be working well for me that way. Anyway, based on my conversation with Vincent, I would suggest starting at 80 on the XDA-1 and working down until you find a setting that works best with the USP-1.
I can confirm that during a conversation with Lonnie that the XDA-1 signal quality does NOT change no matter what volume you select. Its effect is exactly the same as using an Alps volume control. It changes volume by introducing a "step-ladder" of resistors for each increment. He also said that he would use the XDA-1's volume control, when hooked to a pre-amp, as a trim to equalize its sound level to that of other components hooked to the pre-amp.
Ideally, you would start with the XDA-1's volume at 80; and, if necessary, adjust it to match the other components volume level thru the pre-amp.