This is my first "new thread' here. I realized there is no thread currently for the Topping A30 (only one for the D30). I got this in a few weeks ago but just opened it up on saturday. Unfortunately it came with a USA plug attached to a 230/240V adapter (its not a wall wart, its a floor wart with non removable plugs). It has a proprietary end on it so its not like there will be a universal adapter for it (I think its part of how it has its dual mode setup). It has both a low output 3.5mm and a high output 6.25mm jack(s). 3 Gain settings (0db, 9db, 18db) and it has a maximum power of 1551mw in high output mode. I have been searching (as some of you might have read) for a low power amp good for sensitive phones and IEM's that works in a desktop environment. I also wanted one that has an analog passthrough all in one unit. This unit delivers on all my needs. Here are the posted specs: Product Description: A30 power supply is a special customized three-way high-performance linear power supply Specifications: Analog input 1 x RCA (L + R) LineOUT 1 x RCA (L + R) Headphone output 1 x 6.35 headphone jack; 1 x 3.5 headphone jack Unit weight of 525g (not including the adapter) Unit Size 17.0 cm x 12.2 cm x 3.8 cm The recommended load impedance range: 16-600Ω Maximum output power: 1551mW x 2 (PO = Hi, 6.35 headphone port, RL = 32Ω, THD + N = 1%) 291mW x 2 (PO = Hi, 6.35 headphone jack, RL = 300Ω, THD + N = 1%) 152mW x 2 (PO = Hi, 6.35 headphone jack, RL = 600Ω, THD + N = 1%) 757mW x 2 (PO = Hi, 3.5 headphone jack, RL = 32Ω, THD + N = 1%) 258mW x 2 (PO = Hi, 3.5 headphone jack, RL = 300Ω, THD + N = 1%) 143mW x 2 (PO = Hi, 3.5 headphone jack, RL = 600Ω, THD + N = 1%) The output voltage swing:26.6Vpp Typical Distortion (@ 1kHz) : 0.0019% (RL = 32Ω, G = 0dB, IN = 0.5Vrms) 0.0003% (RL = 300Ω, G = 9dB, IN = 0.5Vrms) 0.0006% (RL = 600Ω, G = 18dB, IN = 0.5Vrms) Frequency response: 10 - 200kHz Input Sensitivity: 10.0Vrms (PO = Hi, G = 0dB) 3.3Vrms (PO = Hi, G = 9dB) 1.2Vrms (PO = Hi, G = 18dB) Bottom noise (A-weighted): 2.2uV (G = 0dB, RL = 32Ω) 3.2uV (G = 9dB, RL = 32Ω) 8.2uV (G = 18dB, RL = 32Ω) Gain : 0dB / 9dB / 18dB Signal to noise ratio: 126dB (PO = Hi, G = 0dB) 121dB (PO = Hi, G = 9dB) 111dB (PO = Hi, G = 18dB) Packaging list: Packing List 1 x A30 1 x power adapter 1 x Operating Instructions 1 x Warranty card Now some are going to ask "how does it sound", well it sounds like nothing. I can't hear any "modification" to any of my music. I tested it against a Fulla 2 (more testing will be done) and its warmer than the Fulla 2 (which is a bit bright IMHO). So far I have only tested it with the Topping D30 DAC, although I did just have the D30 plugged into the Fulla 2 (RCA -> 3.5mm to Fulla 2 Input) for a few hours and I would have to say that the amp stage is similar but the Fulla2 just has way too much power for my headphones and I basically have to use a UE Buffer Jack if I want any sort of volume control (although this mutes the lower end a bit even at higher volumes). I have not yet compared it against my FiiO K1 or my HTC 10 (I will in time) but this also is a full stack comparison vs just an Amp comparison. I will have an O2Amp sometime in the future and will compare that aswell. What really does it for me though is that I have real granular volume control with sensitive IEM's/Headphones. I currently have used my Panasonic RP-HD10's and my 1More Triple drivers with it. Previously the 1More's were too loud past the 10 oclock position on the Fulla 2 and the Panasonics are honestly already quite loud (too loud for some songs) past the 8 oclock position. Meaning that I have very little volume control as the Fulla 2's volume is "off" at the 7 oclock position. I found myself regularly moving it back and forth because songs were either too loud or too quiet. As I said before the UE Buffer Jack helped with that but honestly with the 1More's it really mutes the lower end where I could have the volume at the 2 oclock position and the bass still didn't come back. Right now on the A30 I am writing this while listening to Soft Jazz backdrop playlist on Spotify on the 1More's and my volume Pot is around 12 oclock and the volume is very nice. This is in the 0db setting, the amp on "low" and using the 3.5mm jack. Another plus is that I can just plug my 1More's into this jack without issue, on the Fulla2 I cannot do that as I have to use a 6.25->3.5mm adapter and I get ghost voices when its plugged in all the way. I think its more than a relevant offering today where more and more cans are being designed to run off of phones and as such they need less and less power, yet most amps on the market are providing tons of power for big cans, and honestly you can't plug headphones into DAC's and actually get quality output, leaving you with no real offerings. Here is a little pic of the stack: I hope this helps anyone looking at one of these, its really a great Amp that nobody knows about.