I got this to work with my nexus 5x with just a usb c to usb micro cable!   Very nice

I agree in my system - low gain is too low for line level. If i understand correctly, dbu 14.5 / 4.1 vrms ( what the dacport hd is on high gain) is 8 db greater than a 2 vrms standard cd output (so a bit hot) If low gain is 20 db less does that mean its outputting only .411 vrms? My creek...

I've owned half a dozen combination of highish end amps and headphones and dacs   I have to say that this is the best combo yet - particularly considering price and convenience.

I totally thought this was ridiculous until I saw:   1. Ayre's involvement 2. Major label backing. 3. Major label artist interest in reselling their back catalogs (i.e. you can see the drool in that endorsement video )   I'm skeptical that 96/24 is something I would notice over good...

I've tried to find an answer for this - so I hope this isn't tedius.   I have owned SR60 and HF2 (which I regret selling at this point.)      Haven't liked the PS500 on audition enough to buy.  Didn't like the bass boost; would be perfect without that to me (relatively low distortion...

Bought a second hand V PSU II and it looks like it only is going to come with a single 1.3mm dc to 1.3mm dc cable.   Can anybody suggest a place to buy or have this cable made?   thanks!   JP       Sorry I justed discovered digikey and I think that will do it.   Edited...

Just checked in after a while of inactivity.  Really great concept.   FA

Has anybody heard both the woo Wa6 se and the mapletree super ii with grados?

Well that makes me feel better actually!     I was worried my mapletree super 2 might have too low of Zout based on your 10 ohm recommendation (which recommendation totally makes sense based on that resistance-across-the-spectrum chart you showed)    I reviewed the circuit diagram at the end...

This is really great info and I really appreciate it.     So with tube amps, lower output impedance is not necessarily automatically better - but some damping is desirable?   I actually have the Super 2 which is a different circuit that has EL84s and a  published  output impedance of...

I hope this doesn't annoy anybody, I posted this under mapletree thread - but it's also about my experience with my HF2     I have an idea (perhaps is well trod.. ) as to why the mapletree ear seems to be considered the best all tube (excluding rectification) headphone amp for grado.    ...

I have an idea (perhaps is well trod.. ) as to why the mapletree ear seems to be considered the best all tube (excluding rectification) headphone amp for grado.     Of the non-hybrid tube amps I am aware of, the mapletree has by far the lowest output impedance:   1.3 ohms for the Super...

Power Supply  

I received my new  Ear+ HD Super 2.  Sounds awesome, of course.     Here is the amp chassis     Here is a picture of the guts of the actual amp chassis.    

Quote:   I say without any sarcasm, that perhaps these charts don't mean much if anything - and that there is more to it all.