Member Reviews: JDS Labs Assembled Objective2 Headphone Amplifier

Linear, low output impedance and never noisy without a "signature". If you want to listen to your headphones and not your voiced headphone amps I highly recommend this.

Lets see, a battery powered Amp that runs for hours on hours with a charge, or a desktop Amp that can throw almost a watt out and run forever?   I don't know - its sort of both. It is too big to be taken anywhere, but definitely small enough to travel if you want it to. I ordered mine with a black face plate which I think is a little cooler looking.   There appears to be some "mythology" surrounding this amp, some claim it "ruins" their sound quality while others think its awesome. I think its an amp - that is, it takes a signal, amplifies it, and otherwise has no real impact on what you hear. It has no real noise I can detect (except at max gain of 6.5X with nothing...

Okay... I believe the O2+ODAC combo is a good product for the price. Yeah, that does sound like a cop out, doesn't it? Alright, I'll try again. With headphones that this unit will normally be paired with; HD650, Q701, HE300, FA-003, etc. (solid mid-fi cans), I think it does quite well. To me it stumbles where most SS mid-fi amps stumble, it's a little on the bright side of neutral and highs are a bit etched. Also, mids do seem slightly congested and bass could be tighter. Also, mine has a slightly scratchy volume pot (not a huge deal, probably just needs a shot of DeoxIT). I don't think it drives my T1s very well, same goes for the TH900. Those foibles I mentioned before seem to get...

This is a perfect transportable amp with size similar to Hifiman HM801.   When couple with a Sansa Clip, the sound quality beats my previous HM801 w/o external amp.   It drives all of my headphones very well, including LCD-2s, DT880s/600ohm and Westone ES3Xs (IEMs).   Overall sound quality is easily at the same level of full size amps costing around $300-500 USD. It does not seem to add any flavor to music, more like wire with gain. Very transparent.   Some of my previous impressions can be found here:  ...

The JDS Labs O2 Amplifier Review This is my first Amplifier review, but I will try my best. Equipment Used: Modded T50RP's, Brainwavz HM5, and Dell Dimension 9200   Build Quality 5/5: The enclosure of the O2 is rock solid, each screw is tightly screwed in, I could smash holes in the wall with this small tank. The volume pot sticks out and seems like it could easily break off, but no worries it's tightly attached on. The power button and the gain button is a little too small for the front of casing and wiggles from side to side, but it's also nothing to worry about. In conclusion, the O2 is very stable.   Design 3.5/5: The volume knob is very smooth and slides with...