. I started building headphone amps, a few years back when my sister who works as a nurse during the night shift, would sleep during the day. So I couldn't use my speakers, otherwise i'd wake her up. So I used my computer's built in headphone jack. The sound was ok, but it wasn't very loud or that clean. So i tried a few designs and ended up with a pretty simple design for my headphone amp. When i first turned it on and listened to it, WOW, the sound quality improved greatly. Soundstage, clarity, bass and treble response improved, overall the sound is so much more real in my headphones! Having a dedicated headphone amp made all the difference in the sound quality for my computer. I'm not a hard core audiophile, but I do have expectations on how my audio equipment should perform and sound. Enough of the talk, here it is:
Here is the family of amps i have (some have been given away as gifts and not pictured). One is missing from the picture, because I couldn't find it in my mountain of junk
Here is my first amp that I built, it only has one flaw that led me to build another one, was that my power jack was on the side of the unit, not on the back. What was i thinking?!
Here comes the second one. Looks more like a toy IMO. Has a sexy blue LED indicated up front.
This one is the most interesting, yet it was a challenge at the same time. Build a amp inside a altoids tin. Its been done many times over by others, but for me... well its kind of a good try.
This one, i call it "Lady in Red" well its not really red (its maroon), but i like the name. For a beautiful yet very powerful amplifier. This one i decided to use a PCB board and populate it. This design is superior to all the designs that i've done before this one. If i didn't fry one of the chips on it, it would be on my desk right now. This one is pending for repair.
Then, after that one... yeah i'm getting crazy now. I've ventured into non-solid state electronics and made a vacuum tube headphone amp. This one is a prototype, that i actually found myself using often. It looks way out of whack...lol.
This last one here is the refined and finalized version of the above amp:
So what do you guys think? Worth producing them for sale? Even interested in a headphone amp
? Comments, suggestions welcome! 
