[Anarion]

I just received the Massdrop Objective 2 amp but unfortunately I don't have adapter for that power adapter. However, I do have different one (the right one). I assume it would be just fine to use that one? Also that thing that came with the amp seems to be really, REALLY weak. 220mA?! Also the quality is rather questionable...

 

[Oscar-HiFi]

I just received the Massdrop Objective 2 amp but unfortunately I don't have adapter for that power adapter. However, I do have different one (the right one). I assume it would be just fine to use that one? Also that thing that came with the amp seems to be really, REALLY weak. 220mA?! Also the quality is rather questionable...

The O2 needs a 14-20V power brick... https://www.jdslabs.com/products/147/us-15vac-power-adpater-for-O2/
That's what the JDS Labs website says: "Power: Battery or 14-20VAC"

 

[Anarion]

The O2 needs a 14-20V power brick... https://www.jdslabs.com/products/147/us-15vac-power-adpater-for-O2/
That's what the JDS Labs website says: "Power: Battery or 14-20VAC"

Massdrop gives 12VAC adapter (the left one) with it, so I'd assume that their adapter (12VAC) would work. I need to do some searching...

 

[dukefx]

 

[Anarion]

Blaah... I guess I'll just order one from JDS: https://www.jdslabs.com/products/73/g-e-z-15vac-adapter-for-o2/

EDIT:
Actually... Look like I can get basically the same thing from Germany ~20 € with shipping.

 

[mindbomb]

The massdrop power supply is unregulated, so it does end up being higher voltage in practice.

 

[Anarion]

The massdrop power supply is unregulated, so it does end up being higher voltage in practice.

Yeah, I just read some Massdrop comments and noticed that. It's funny, their adapter is 240V 60Hz A plug. Where that combination is even a thing? In any case I ordered this: http://www.headnhifi.com/power-supply-15v-ac It should do the job.

 

[dukefx]

That's the one I posted

 

[Anarion]

That's the one I posted

Spec wise at least - might be the same though, that would be good.

 

[Arkady Duntov]

Spec wise at least - might be the same though, that would be good.

A few years ago, JDS shipped an AC-AC adapter which delivered 12V. There was some discussion, in this thread I think, which said that 12V might be insufficient for some loads, so I bought a 20V adapter. Later I read that the excess power from that adapter would just be wasted as heat.

The O2 I bought from them this year has a 12V adapter. It works fine for the IEMs and AKG 7XX which which I 've used it.

 

[jseaber]

A few years ago, JDS shipped an AC-AC adapter which delivered 12V. There was some discussion, in this thread I think, which said that 12V might be insufficient for some loads, so I bought a 20V adapter. Later I read that the excess power from that adapter would just be wasted as heat.

The O2 I bought from them this year has a 12V adapter. It works fine for the IEMs and AKG 7XX which which I 've used it.

We've only shipped 15VAC, 500mA transformers since at least 2014, if not longer:
https://www.jdslabs.com/products/147/15vac-power-adapter/

Triad P/N WAU12-200 was a 12VAC, 200mA adapter originally recommended by NwAvGuy in 2011. It was acceptable under light loads. Voltage dips into unacceptable territory from 100-110VAC outlets. We've long since abandoned this part.

 

[Arkady Duntov]

We've only shipped 15VAC, 500mA transformers since at least 2014, if not longer:
https://www.jdslabs.com/products/147/15vac-power-adapter/

Triad P/N WAU12-200 was a 12VAC, 200mA adapter originally recommended by NwAvGuy in 2011. It was acceptable under light loads. Voltage dips into unacceptable territory from 100-110VAC outlets. We've long since abandoned this part.

Obviously, I misread the markings on my newer adapter. It's clearly 15VAC, 500mA as you noted.

I must have purchased my first O2 in 2012 or 2013. It was one with the "silver-colored" face plate.

 

[Anarion]

The adapter arrived two days ago (it's beyond me how priority air mail from Germany can take this long - it was shipped on 20.12.2017). It's the same one as sold by JDS.

When it comes to sound I think it's no contest. I keep using AE-5 as an amp too when using my desktop.

 

[ostewart]

The adapter arrived two days ago (it's beyond me how priority air mail from Germany can take this long - it was shipped on 20.12.2017). It's the same one as sold by JDS.

When it comes to sound I think it's no contest. I keep using AE-5 as an amp too when using my desktop.

Enjoy your O2, still love mine for reference purposes otherwise I mainly use my Keces S3

 

[Anarion]

Enjoy your O2, still love mine for reference purposes otherwise I mainly use my Keces S3

It can be handy when using portable devices as source. Just to clear possible confusion: AE-5 is noticeably better and the advantage in soundstage is drastic. The difference is actually quite big which is surprising. Makes me wonder whether or not Massdrop cut corners... That being said, on paper AE-5's headphone out is better and it seems to be the case in practice too.