[size=medium]Greetings,[/size]
[size=medium]I know some of you here as I have posted on the audiokarma- Grant Fidelity forum (I generated the tube rolling spreadsheet for the TubeDAC-11). [/size][size=medium]Other than complimenting Project86 earlier in this thread for a fantastic review of the TD-11, I seldom post at head-fi since I have always been about my 2 channel main system. Well, that is changing dramatically in a few months as we are moving to a downtown condo in a 1927 building. Even with sound treatments in place, the main system will be reduced significantly loudness-wise.[/size]
[size=medium]So with that, I am ready to delve aggressively into the headphone world so I can “crank it up” when the mood strikes (which is often). I have already chosen my closed cans for this journey: the new Mr. Speakers Alpha Dogs (heavily modified Fostex T50RP’s). Rest of system is Mac Mini dedicated music server w/ J Keny USB/SPDIF converter, TubeDAC-11, “amp to be determined”, Alpha Dogs.[/size]
[size=medium]The Alpha Dogs have a 50 ohm impedance,. 250 mW min & 1 w/ ch or greater recommended. Sensitivity is 94 dB/ mW. With a Rat Shack SPL meter, I generally set volume to 82 dB or so w/ 85 dB peaks.[/size]
[size=medium]So I could use the headphone out of the TD-11 (I have some cheaper JVC HA-S400’s but wasn’t all that impressed). I assume the Tube Out probably is too much for these cans since 300 ohm or greater is mentioned by Ian in his TD-11 specs. Since these AD's are said to be harder to drive, does that allow the Tube Out to possibly be considered? Does the TD-11 back panel Y adapter to Line Out or DAC out garner any improvements vs. the front panel headphone out ? [/size][size=medium]I’ll be adding a better headphone amp later on, but just curious what TD-11 owners think.[/size]