looking for Super low noise floor amp

The Objective2.  Its dead quiet and got plenty of power for most all 'phones on the market.  Way quieter than my D1.

What headphones do you have?

There are people selling assembled versions.  The JDS labs one doesn't have an AC adapter for some reason but links to where you can get one.

If you go by the measurements (as I tend to do) its cleaner and more transparent than Schiit's products (they have a few numbers on their site) and the Burson HA-160D.  There are some rather extensive measurements of the Objective2 on the designer's site which I'm not allowed to link to because he's been banned from Head-Hi but the JDS Labs page has a link to it.

You can read a few of his articles and get a feel for his design philosophy and see what you think.  I enjoy mine quite a bit.  Its dead silent with my very sensitive SE530s but it can also turn my modded T50RPs (probably just a few dB more efficient than your LCD-2s) into small speakers if I crank it.

If you don't mind waiting a bit he's also working on a desktop version called the ODA (Objective Desktop Amp) which will probably be sold commercially too.  Its main advantage is just going to be convenience with a less cramped panel and room for RCA and 1/4" headphone jacks plus an optional USB DAC module since the Objective2 already sound great and has enough power for all but a few headphones already.

I don't know anything about that one.  All I really know about Epiphany is that they're one of the two places selling completed Objective2s.

The wire  and LPA-2 ....these have the lowest noise floor ...from what I know.

the 650 and the LCD-2 are fairly low V sensitivity headphones and fairly similar in V sensitivity - but the LCD-2 needs ~6x more current than than the Senn - enough that even the O2 can't really drive it to "rock out" loud levels

this means they should give about the same noise from the same amp and a lot less noise than many higher V sensitivity headphone would

if you hear noise with the amp volume control all the way down then it is the amp's noise

if you have to turn it up to hear the noise it is a source problem - it is easy to hear the tape noise on many classic rock analog tape mastered recordings (when there is enough silence in the recording)

PC soundcard chipsets and some poorer DAP or cheap DACs may have too high electrical noise if you can establish that it isn't in the recording

you may want to look over this article

http://gilmore2.chem.northwestern.edu/articles/hearing_art.htm

Quote:

Originally Posted by UtzY 

The wire  and LPA-2 ....these have the lowest noise floor ...from what I know.

I knew about The Wire but is anyone selling completed units?  The LPA-2 looks interesting.  Do you have to contact them direct to order or do they have distributors?