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So I just got the 220v medium gain version and i live in the US. When I plug it in and turn it on it makes a thumping sound, I think its coming from the power supply but have no ideas on where to go from here as i dont wanna kill my unit. What power supply do i need.
I have the exact same problem.
its the ac adapter, need the 110?120? volt adapter
I ordered the 110v but I received the 240vac 60hz input, 12vac @ 220mA output. So I think the mistake comes from massdrop.
yeah it does you dontnhave to send it back though just need to find a 110v ac adapter with the right specs, i think jds sells the right one for 14 bucks, annoying process to have to get the stereo L and R as well as a power supply
I get what you're saying but I don't want to buy an adapter when massdrop made the mistake and not me.
yeah i get that as well but from what i heard costumer support isnt great and im pretty sure they blew through the 110v stock since its not a option anymore. you could be looking at a long time to get your ac but hey if you do get it that would be sweet.
I bought my transformer off Amazon. Mine is a 12vac 5000MA ACtoAC transformer. I left a review and it's the only one.With the same profile pic as the one on here. I've heard with an inadequate transformer it make the audio clip or introduce distortion.
Just bought one off JDS labs. 15v and its shipping in now
That'll do nice. I'm actually about to buy the Element from them. I think the max The 02 will take is 20vac. Or that's what mine says. My 02 is from jds labs.
Element looks nice, if anything i will be getting another pair of headphones strictly for gaming so far im almost satisfied with the 6xx's i have. Just wanted a powerful consistant amp for the setup and the o2 will do that well enough.
That's what I use mine for. I just bought the HE 400i to play games with and they're fantastic. I almost pulled the trigger on some HD650's. I was using the DT 990 600 OHM before the 400i and the Sennheiser G4me Zero 150 OHM before that. They all sound amazing out of the 02. I've got mine hooked up to an ESS9018 Dac & it's surprisingly amazing sounding. Itll be hard to beat honestly.
I was hoping the 6xx's would have some insanely pinpoint soundstage but they dont seem too have that 100% down what i do love is the flatness they have the tremble doesnt blow my ears out and the bass isnt overpowering. might get the shp9500s next or audio technica's ad700.
The Sennheiser game zeros have a smaller sound stage than the 6xx or any of the other headphones I have, but they're the most accurate headphones while gaming I've ever used. The 400i are more accurate than the 990's tho and the 990 have the bigger sound stage. The 400i sound crispy for fps. I like to have a neutral sound and let the headphones change the music. No EQ or anything. Just the AMP,DAC and the sound signature of the phones.
yeah i heard the 650s soundstage wasnt nuts but i got them anyway due to reviews, thanks for the imput though its good to hear from others with a wide range of headphones.
NP, enjoy the Objective goodness!
After doing some digging around i found out yes the 12v is pretty underpowered most o2 amps can handle up to 20v with 15v being the reccomend, but i guess you get what you pay for and thats what makes massdrop cheap...
I bought aftermarket O2 compatible 15V wall warts from JDS Labs to replace the 12V wall warts provided by Massdrop. Does it change something with my Massdrop O2s ? I honestly don’t know, but I prefer to use wall warts that are up to the original O2 specifications. Worst case the circuits heat up a bit more inside the enclosure and the output power is slightly higher, but I did not see any Difference in real life.
I agree with you in theory, but in real life I haven’t notice a difference. My three O2s are from Massdrop, but I bought new wall warts from JDS Labs for two of them, the third Massdrop O2 that I own is still driven by the 12v wall wart provided by Massdrop. You say it is underpowered with the 12V Massdrop provided wall wart? I believe you, and it’s the main reason why I bought new 15V wall warts from JDS Labs for my Massdrop O2, but I honestly cannot replicate a significative difference with my three Massdrop O2 when comparing both wall warts.
I’ve read that Nwavguy blog comment many times months ago. Its the reason that I ordered new wall warts from JDSLabs. I’m not challenging you. I agree with you, it’s the reason why I decided to replace the Massdrop wall warts by the JDSLabs ones. But to my ears I didn't notice a significative difference while driving my 300 ohms Sennheisers. I remember reading comments / rumours regarding the Massdrop provided wall warts made in China that these 12Vrms rated transformers could probably provide closer to 15 Vrms in real life. Like for the Triad wall warts by Mouser mentioned above, I wouldn’t surprized that these cheaply made « Massdrop wall warts » may not strictly follow their rated specification (12Vrms) and may exceed in real life that rating at 13V, 13.5V or more, closer to the ideal 15Vrms voltage of the JDSLabs wall wart model. I haven’t tested the actual voltage output of the wall warts in real life on a test bench using mesuring equipment and I don’t know if those rumours/comments are true or not, but It may explains why the 12V Massdrop wall warts sound similar to the 15V JDSLabs wall warts in real life. I don’t know... But in the end Massdrop should have provided in the first place true 15 V specification wall warts, not those cheap chinese « 12V wall warts that may actually provide a bit more voltage because they don’t really follow the specs » kind of cheap wall warts model... In the end it was cheaper for me to buy the Massdrop O2s and buy extra wall warts from JDSLabs than to buy the JDSLabs O2 amp at its regular pricing. I just hope that Massdrop’s O2 don’t hide other short cuts inside their O2 designs, compared to the Nwavguy’s original design. You never know when you deal with chinese cheap third party suppliers/assemblers. Massdrop is in principle the « manufacturer » responsible for the design of its O2 version and should follow its third party assemblers more closely in my opinion. 12V wall warts are not acceptable in my opinion.
By the way JDSLabs doesn’t own the O2 design. Their only follow NWavguy’s recipe under the public license, just like Massdrop is supposed to do on their side. JDSLabs has nothing to do with Massdrop. They are a competitor to Massdrop’s own O2 version. I think however that JDSLabs and other competitor Mayflower assemble their O2 amps in the USA, contrary to Massdrop’s O2 version.
You would need some high impedance headphones and starve them for power. Something sensitive where the low gain wasnt loud enough. The HD800's would sound pretty bad out of the massdrop supplied transformer I promise. It would introduce distortion and or muddle the sound pretty bad at the higher end. If you have lower impedance headphones that arent very power hungry you probably wont notice a difference.
If you say so...
Anyways I don’t use the Massdrop 12V transformers anymore amd I don’t starve my Senns to death either. But I don’t perceive any difference with the JDSLabs transformers. Each to its own courtyard I guess...
Well it's not me saying it. It's verified by someone who tested it. You can look it up for yourself I'm sure you can find it if you dig hard enough. Also I dnt think you have any control if your headphones are starved for power. Lol, but it doesnt sound like you have run into that situation or you'd know there was an issue.
Yeah I got it right after I bought my o2 now it works great no background noise and such, very loud. thanks