[Jony27]

Damn good price.
Bought it second hand off someone here for €170 which is about £130
Literally sent it 30mins before you had replied.
Ah well, you win some, you lose some.

 

[Solrighal]

No problem mate. Enjoy your purchase.

I might do better if I ever got around to advertising it.

 

[Jony27]

No problem mate. Enjoy your purchase.

I might do better if I ever got around to advertising it.

Are you in a hurry? I do prefer the matching colour of your stack plus cheaper is a bonus. I might try and sell on the one I just bought and get yours. Unless you're in a hurry to sell.

 

[Vadercellkey]

  Whats wrong with the china amp? I don't see anything in particular wrong with the amp. Is it just the quality of the components? And where is a choke left out? How do you know/see?
 

 
Yeah... dont know! Apparently they've missed the design too.

 

[Solrighal]

Are you in a hurry? I do prefer the matching colour of your stack plus cheaper is a bonus. I might try and sell on the one I just bought and get yours. Unless you're in a hurry to sell.

I'm in no hurry at all. I'm in the UK though if that's a problem.

 

[Jony27]

In the UK too, Belfast, Northern Ireland to be precise
Ill see what I can do with it when they arrive.

I'm in no hurry at all. I'm in the UK though if that's a problem.

 

[WilliamLeonhart]

Just out of curiosity, how many companies are producing O2 and ODAC? JDS Labs, Mayflower, Headnhifi. Who else?

 

[Solrighal]

  Just out of curiosity, how many companies are producing O2 and ODAC? JDS Labs, Mayflower, Headnhifi. Who else?

 
Epiphany Acoustics in England make & sell them.

 

[raoultrifan]

Check on eBay for "AGDR audio" and you'll be surprised about a new improved version of O2. Feel free to check AGDR's projects on diyaudio or on his own website.
 
AGDR is more like "successor" of nwavguy's project, in terms of improving and developing the O2 project for headphones with more power demands. So, if you're hungry for more power or you need to drive some planars, check out his website.

 

[diamondears]

Check on eBay for "AGDR audio" and you'll be surprised about a new improved version of O2. Feel free to check AGDR's projects on diyaudio or on his own website.

AGDR is more like "successor" of nwavguy's project, in terms of improving and developing the O2 project for headphones with more power demands. So, if you're hungry for more power or you need to drive some planars, check out his website.

What are the tweaks aside from more power?

 

[WilliamLeonhart]

if I want to change maximum/minimum gains on my O2, what part will I have to replace?

 

[diamondears]

if I want to change maximum/minimum gains on my O2, what part will I have to replace?

Max Vrms that O2 can handle is 7Vrms, more than that and it will clip, IIRC. Is there a HP out there that requires more than 7Vrms???

 

[headwhacker]

Max Vrms that O2 can handle is 7Vrms, more than that and it will clip, IIRC. Is there a HP out there that requires more than 7Vrms???

 
Try HE-6

 

[diamondears]

Try HE-6

How much does it need?

 

[headwhacker]

How much does it need?

 
Assuming your target maximum volume loudness is 115dB and a 3dB headroom. To drive HE-6 to 118dB requires around 12Vrms