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86% would recommend to a friend 
Drop O2 Headphone Amplifier
01 / 08
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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Customer Reviews
4.4
(337 reviews)
5star(229)
4star(66)
3star(14)
2star(12)
1star(16)
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keyboard_arrow_downbdipert
4
Jun 1, 2024
checkVerified Buyer
Excellent Sound
Very happy with my purchase!
Recommends this product? Yes
PandasFinest
10
May 20, 2024
checkVerified Buyer
Great little budget amp... Better options nowadays
Really great budget headphone amp. Solid construction. Can't really recommend this in 2024 onwards since there are far better options (These are a very old design) I would suggest the Atom from JDLabs or the Magni Unity with a built in DAC. Very good amp though, sounds great and can drive almost any headphones
Recommends this product? Yes
JPeezy
0
Mar 22, 2024
checkVerified Buyer
Simplistic
Great little device for my desk. Caught it on sale so the price was also very nice.
Recommends this product? Yes
GrayDeathLegion
2
Jan 2, 2024
checkVerified Buyer
Great for unusual setups
I connected the amp directly to the stereo outs on a Denon DCM-380 CD change and it works extremely well. It drives my ATH-A900 headphones effortlessly. At low gain, I only have to turn the volume up to the 8-o-clock position to get at a high volume that is still comfortable to my hearing. Beware: this amp (when paired with a good DAC like the one on the Denon) will highlight all details of your music collection, even the flaws in the final mix and master.
Recommends this product? Yes
kyodop
0
Jun 5, 2023
checkVerified Buyer
was wrong tghing
i d
Recommends this product? Yes
exensa
0
May 10, 2023
checkVerified Buyer
Reliable Amp
I used this for 4 years and it worked fantastically. No complaints at all. I just needed to be careful because my Senheisser HD600 cord would get snagged and tug on it. It made the jack loose but overall it still works great.
Recommends this product? Yes
Shazzy
2
Feb 19, 2023
checkVerified Buyer
It’s great!
Does exactly what it says it does and does it very well
Recommends this product? Yes
SirSaber
0
Dec 20, 2022
checkVerified Buyer
Didn't come with an RCA to JACK cable
I mean, they've could've just added a free one, was so happy when I got it and then couldn't use because I was missing an RCA into JACK cable to use on my PC. Quality wise it's good. Don't know if it's just mine but I do hear a pop noise from time to time.
Recommends this product? No
TutterButter
0
Aug 18, 2022
checkVerified Buyer
Worked well.... when it worked
Overall i would say this was a good amp it lasted as long as my hd 6xx headphones did about 2-3 years. I do have positive and negative experiences with this amp due to the loud popping noise it would emit. Never could figure out what the problem was. I also felt like i was cleaning corrosion off of my battery terminals on every 9v swap. But I give it 3 stars still because it was a good amp when it worked producing a quality audiophile for my Sennheiser hd6xx's. I would not be able to recommend this product because of only having owned 1 of these and my experience based off reviews I've read may have been a fluke.
Recommends this product? No
Sketchfellow
2
Aug 18, 2022
checkVerified Buyer
Nice and Powerful
These supply more than enough power for my cans, however I do not recommend buying these at $95 as I believe there are better alternatives at similar prices such as the Atom amp. However I bought these on sale for around $50 and at that price these are a steal.
Recommends this product? Yes
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