Havent posted here for a long time and have had a few email changes in that time. All Telstra Australia email accounts fail eventually and they cant fix them so moved to gmail. All good. A few new builds since Sanguine. Ill just leave links to my mian blog if you would like to take a look at...

I had a request from a Kiwi friend to make him a very compact and light headphone amp for his super expensive in ear buds and noise cancelling BOSE headphones. He travels regularly back to New Zealand to visit family and loves his music. I have made many headphone amps both portable and home...

A Kiwi friend of mine spends a lot of time on a plane. He has some expensive ear buds but found the plane's system really didn't drive them well. He asked me to make a small and light HP amp and this is the result. The enclosure is two tone ABS. I have lined it with bitumanised heavy Al foil and...

God! That's good.

Looks like a good start.

Highflying: You have me thinking.

Highflying: I developed a similar finish using a high quality house paint, a semi-dry roller and secretly, now well known, technique. Take look at my DIY, retro-thermionic blog spot (Google it).

Take a look at my genuine America Oak wood knobs on my Audio person blog.

  Here I posted my 2N3055 headphone amp (Woody Pro) and said how much I enjoined it. I was forced to use it because I sold my Tubed HP amp. I bought some Beyerdynamics DT770s (250ohm) but found Woody Pro wouldn't drive it quite loud enough being an emitter follower. So I added my new Tube and...

Look sweet.

Very smart looking build.

Oatley Electronics Australia, who is famous for the portable triode headphone (HP) amp, the K272C (latest iteration), has been working hard to produce a truly new and revolutionary home based HP amp. This time they are going out on a limb and have designed a unique and powerful output stage. It...

I was given these prototype cct. brds. (populated) some years back but only recently have I started to listen to them. There was a K311 and now a K311B and I think there maybe a "C". I have the schematic but at this point will not publish it. The amp is by Oatley Electronics. It uses two 2SK170...

Good work.

Both neat builds.

KT88: great work.

Very neat. Looks pro.

Neat

It is more of a driver (being emitter follower) than a preamp. Usually you would expect a preamp to have multiple inputs and be able to attenuated the signal and drive into low impedance. With most players putting out over 2V these days a small loss of this voltage should not hamper power amps...

I actually build this quite some time back but had it out the other day and was really enjoying it and thought I should post the project. This is something I designed myself and design work is not my strongest point. Probably, concept, layout and construction are I'm better at. No I do don't...

FrankCooter: Thanks for the nice comments. Two of the most over engineered power amps (a little off thread here) are my 300B I call "The Silver Dragon" and my 807 amp named "Luciano". The reason why they are so over engineered is they were designed by an electronics engineer in Seattle who works...

Thanks for the nice comments (sort of). I guess that's the beauty of DIY is for the cost of parts only you can go nuts. Yes it is class A but all currents etc are low as this is not a power amp. no huge idles currents. I wanted the PS to be dead quiet and the only way to do that is careful...