Drop O2 Headphone Amplifier
Drop O2 Headphone Amplifier
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Product Description
In 2011, audio engineer NwAvGuy published a blog post titled “O2 Headphone Amp,” in which he outlined his philosophy on defining sound quality and detailed his ideal audiophile circuit design. Our version of NwAvGuy's famous O2 amplifier, the Objective 2 Desktop Edition features updates based on feedback from the community Read More

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JaleesaG
1505
Marketing Team
Jul 15, 2020
Stickied
UPDATE FOR MAY-JULY 2020 PURCHASERS Hi everyone, We’re reaching out to let you know we’re tracking about a week behind on the Drop O2 Headphone Amplifier and we now expect to ship in the second week of August. Our apologies for the delay. If you’d prefer not to wait the additional time, you can cancel your order on your Transactions page: https://drop.com/transactions. Thank you so much for your patience. If you have any questions, please feel free to reach out to our Community Support team at drop.com/support.
verifonix
982
Nov 12, 2020
Nowadays, in 2020 you should really buy a $99 magni heresy, $99 jds labs atom or $139 topping l30
blacksails
37
Nov 9, 2020
Although the drop logo is quite subtle I would have liked to see this without the additional branding like the older models.
Leovitss
0
Nov 7, 2020
Hey guys, so I have an o2 drop amp, RCA to 3.5mm going from the amp to my Grace sdac. USB from sdac to computer, windows says its playing audio through it but nothing is coming through my headphones, which work fine without the setup. My Sennheiser 6xx will not play any audio whatsoever plugged into the front of my amp. Any help would be EXTREMELY appreciated because there is zero support or instructions on what to do if it isn't working. Is it the RCA to 3.5mm? Should I do RCA to RCA? Could that maybe be the problem? I really don't want the answer to be my brand new amp is broken.
(Edited)
Michael-Q
203
Nov 8, 2020
I doubt the issue is with RCA to 3.5mm cable unless something is seriously defective. I don't see how a RCA to RCA cable would change things unless something massive like the 3.5mm port/jack isn't even wired up. (it kind of sounded like you did this but hard to tell for sure) One thought I have that I think someone new might make is you need to select the dac (playback device) you want to be outputting in windows. Otherwise it will continue outputting the old way. To change this, I left click on the speaker symbol in the lower right corner, click above the volume bar with all the text describing the "playback device", and select the new dac. Since you have the RCA to 3.5mm cable, you can test the amp without the dac. The 3.5mm end goes into the headphones out/lineout or R/L out (they all do the same for the most part in this situation) on your computer case/motherboard/laptop. Keep the headphones off your ears and play with the volume and gain settings to see if things change. Hope some of that helps.
(Edited)
Niko08
11
Oct 31, 2020
How would i connect this to a computer?
Niko08
11
Oct 31, 2020
Thx bro I got nervous for a sec lol 😂
phoenixsong
1117
Oct 31, 2020
Haha can relate XD
saldog
1
Oct 27, 2020
Update: I tried several interconnects and got the same noise. So, the only thing left was to change the source. I switched from my MacBook Air to an iPad and the noise was gone. The amp is fine but it doesn't like the analog out from the MacBook I suppose. I have a Soundblaster Play 3 DAC laying around somewhere and intended to use that anyway, but I can't find the bloody thing. The good news is, the amp sounds great with the iPad, if a little bright when pushed. I just got this amp today. I'm getting a strange mid-high range, variable noise on it. I tried two separate sets of phones and got the same exact noise. I bypassed the amp and got zero noise. I haven't switched interconnects yet to rule them out. This is analog out from the headphone jack of a MacBook Air 2020. The noise is quiet enough to be completely overwhelmed at loud volume, but in quiet passages, it is very noticeable. Gain switch changes the volume of the noise but it's still there either way. Pausing music doesn't affect the noise. Anyone else have the same issue? I'm thinking about sending it back. Besides the noise, the amp seems fine with no distortion and plenty of power to drive my ATH-M50x headphones, which were actually pretty good without the amp. I just wanted a bit more power and this amp does that. It's just that bloody noise.
(Edited)
saldog
1
Nov 1, 2020
I can't find any specs on the audio connector other than basic stuff. I believe the port supports line-level input (microphone) and headphone-level output (I have no idea what the impedance is). What I ended up doing was using my CalDigit TS3+ dock. It has a DAC and has discrete analog in and out 3.5mm ports. It sounds perfectly clean. I don't know if this problem is specific to my machine or inherent in the 2020 Air design. My wife has a 2019 Air so I will experiment with that at some point to see if it is the same. But, I'm happy now using a different port. I actually didn't envision using the MacBook's analog out indefinitely anyway, as I like being able to connect/disconnect the laptop with a single Thunderbolt 3 connection. That's what I have now and it works great. Thanks for your response. Saldog
phoenixsong
1117
Nov 1, 2020
Glad things have worked out for you. Enjoy!
asiandrummer
1
Sep 11, 2020
Could someone from Drop look at my ticket for a refund request? I'm trying to purchase a O2 + SDAC model and I need to return this one.
Joseq
4
Aug 12, 2020
What is the difference between standard gain vs medium gain?
Michael-Q
203
Aug 14, 2020
Standard gain provides some gain and up to a lot of gain. -> things are typically a little louder to a lot louder Medium gain provides unity gain and up to some gain. -> things are typically the same loudness or a little louder Gain is useful if your audio source is really low voltage (very quiet). A typical DAC has a decent amount of voltage swing -> I personally find unity gain (the lowest gain option) more than enough. Using high gains isn't ideal because it amplifies system noise but if there's any doubt that your audio source is very weak it is the safest bet. I'd avoid standard gain option unless you know you listen to things very loud and your headphones have low sensitivity (high impedance). However, you may feel like the medium gain option doesn't do enough (leading to buyers regret). (Trying to say this next part concisely but it isn't a perfectly accurate statement ) However, one issue with medium gain option is you really can't fully utilize the max power specifications of the amp into high impedance loads (unless your source has huge voltage swings). Granted, if you are fully utilizing the max power rating of the amp your ears will be bleeding.
(Edited)
phoenixsong
1117
Oct 31, 2020
Somebody once gave an analogy of different gains being like the different gears in vehicles. I find that really helpful
phoenixsong
1117
Aug 12, 2020
With stuff like the Topping L30 around, I'm not sure how this product remains viable
silentbirdie
40
Oct 15, 2020
or even the schiit magni
theoneblackmage
3
Jun 20, 2020
FYI the latest drops of this unit only come with a 1 year warranty, according to Massdrop support. Despite some of the comments indicating there is a 2 year warranty, that was only for some of the drops from 2015. My unit still powers up, but no sound comes out the RCA connectors. I was told by Massdrop support I am not under warranty, despite basically being still within the 2 year period.
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