headphone amp schematic needed

[Newbietube]

Hi, a friend of mine has asked me to build him a headphone amp. Can anyone recommend a good but not overly complicated or too expensive circuit to follow? I had a look round the net but there seems to be several ways round this and want something that's going to work.
I've completed three amps now, a fifty watt guitar amp and 100w and 200 w bass amps so no stranger to putting stuff together, but looking forward to a smaller project.
Cheers Just

[dcriner]

While not a available as a kit, the $279 O2+DA combo headphone amp available from JDSlabs.com is highly recommended. It was designed by the mysterious NwAvGuy who disappeared about a year or so ago. The schematic is available, but it's not a DIY project.

The amp is solid-state and works great playing digital music from a PC's UPS output playing CDs, etc. It is a combination D-A converter and an amp. I have one.

For $79, you can buy just the O2 headphone amp with only an analog input (no D-A converter).

[Gingertube]

Browse around the Tubecad / Glassware website.
John (Broskie) is a headphone fan and has published a lot of headphone amp designs, some of which can be purchased as a kit.
Just one example (To suit 300 Ohm Headhones):
http://www.tubecad.com/2013/03/blog0257.htm

Perhaps look at his available hardware page for some options and then you can back track to teh blog which talks about the design.
http://glass-ware.stores.yahoo.net/newhardware.html

Cheers,
Ian

[soundbrigade]

Also check http://headwize.com/?page_id=5.

Mapletree Audio design has some interesting models: https://hollowstate.netfirms.com/manuals.htm

If there´s no problem of getting (silicon) sand in your eyes thsi kit is OK: Lehmann DIY kit

[EWBrown]

This one is a simple, straightforward design, and very good sounding:

http://headwize.com/?page_id=427

The design is similar though somewhat more basic, to that used in the Bottlehead "Crack" headphone amp.

I use mine with Sennheiser 600 'phones, and the sound quality is wonderful

Neither design is truly suitable for low impedance (under 300 ohms) headphones, in spite what the article claims,

those may require more power and a suitable output impedance.

/ed

[azazello]

https://picasaweb.google.com/1095707775 ... 0498375714
My OTL tube ampl. for Sen580,acc. Headwize 6AS7. The same that EWBrown adviced.