Monday, 23 March 2015

Will be ready to sell O2+ODAC combos in Sweden within a week or two

I have good news for my Swedish readers. I just placed an order on ten O2+ODAC kits and I'm hoping I will get them by the beginning of next week and I'm hoping to build at least one or two before going on holiday over easter. If you want to buy just an O2 and not the ODAC, let me know and I'll make special arrangements for that.

My plan is to sell a finished O2+ODAC for ~2000SEK+shipping. I will offer custom gain settings for no extra cost. Unfortunately I will not offer any other extras such as 6.3mm output, back panel power or other colors than black (which seems to be the most popular).

Finished black O2+ODAC
So, what do you get when ordering an O2+ODAC combo from me? You get a fully assembled, fully functional amplifier and DAC. You get a 90cm gold plated (looks fancy) USB-cable. Underneath the case there will be small rubber feet to prevent scratches and stop the case from sliding around on your desk. The volume knob will be black brushed aluminium for a nice quality feel. The power adapter is a very compact one with a cord that is long enough for most people. I estimate it is around 1.5m. On request I will add gain resistors which can be useful if you want to switch gain settings in the future. I will make it so that no soldering will be required to change gain resistors, just pluck them out of the socket with a tweezers and put in the new ones. Standard gain will be 2.5x/6.5x. I haven't actually had any headphones that have needed more than 1x but for an example the Sennheiser HD600 needs a high gain. My Denon AH-D2000 and my Koss Porta Pro are just fine with 1x. 

If you are interested in buying one from me, contact me at

If you are not in Sweden but you still think that this looks like a kickass amplifier combo, then check out this site and buy your own DIY-kit.

Thursday, 19 March 2015

Planning to start selling O2+ODAC headphone amplifier + dac combos again

Hello dear readers,

A while ago I had a service where I would build O2+ODAC combos for people for a small fee. I quit that partially because I felt I wasn't paid enough and because I didn't feel like I had the time. However I will be getting more free time now so I could start doing it again but then there is the problem of monetary reward for me. Previously I would end up with a really crappy hourly wage if I would just take single orders for people and build them on request. I am now planning to invest in buying maybe 8-10 sets to build and sell to people. For me this would mean that I make more money per unit sold and you as a potential customer wouldn't have to wait ~1-2 weeks, I could ship as soon as you have paid me and the combo would be in your hands in one or two days.

As I mentioned this will be an investement, a rather big one considering I'm on a student's budget. So before I spend a lot of money ordering the components I would like to know if there is any interest in buying pre-assembled ready-to-run O2+ODAC combos. Remember, this is only for people in Sweden. If you are interested, let me know! Send me an email at or post a comment below.

My plan is to order within a week or two if there is a big enough interest.

Also, I have recently become an affiliate of so if you want to buy any of his products, be it a ready-made amplifier, ODAC or maybe even a DIY-kit, please feel free to use these links below if you want to support me since I get a small percentage of the money you spend on his website if you use the links below.

Full O2 amplifier DIY-kit
O2 amplifier DIY parts-kit
ODAC DIY board only
O2+ODAC headphone amplifier+dac combo
O2 headphone amplifier
ODAC RCA version

Remember, let me know if you are interested! Also, if you are interested in buying anything else from his site and you are intimidated by buying from overseas, let me know and I can add it to my coming order and you can buy it from me instead.

One last thing, if you are not in Sweden but you are still interested in building your own amplifier, use the links above and for instructions check my construction guide and my notes here

If and when I start building again I will create a new, much more detailed step for step guide including everything a total beginner will need to know to build a complete O2+ODAC combo. I may even do a full video guide if there is enough interest.