FiiO FiiO K11 HiFi Balanced Decoder Headphone Amplifier USB DAC Amp Hi-Res Audio 1400mW Power 384kHz/32bit DSD256 4.4mm 6.5mm RCA Coaxial Outputs

Generally great sounding and a solid performer in a neat package. I would recommend this unit, my only complaints are minor nitpicks.Pressing in the knob for 5 seconds to turn the unit off is a pretty annoying design choice for something you will likely want to do every time you use the unit. I have read some reviews that seem to think turning off the unit is impossible - this isn't true, but it highlights the poor design choice.It also seems to take longer than necessary to boot up. This hasn't been my experience with previous headphone amps at a similar price point.. Is it because I need to have ~7 seconds to have time to read "FIIO K11" on the display?The volume knob can only select at increments of 1, so if you want to make a large adjustment to the volume, ... MoreGenerally great sounding and a solid performer in a neat package. I would recommend this unit, my only complaints are minor nitpicks.Pressing in the knob for 5 seconds to turn the unit off is a pretty annoying design choice for something you will likely want to do every time you use the unit. I have read some reviews that seem to think turning off the unit is impossible - this isn't true, but it highlights the poor design choice.It also seems to take longer than necessary to boot up. This hasn't been my experience with previous headphone amps at a similar price point.. Is it because I need to have ~7 seconds to have time to read "FIIO K11" on the display?The volume knob can only select at increments of 1, so if you want to make a large adjustment to the volume, you will be making multiple full rotations of the volume knob - not very satisfying.You will probably want to change the RGB settings the first time you set it up, as the default is fairly garish (you can turn them completely off if you like, or just use solid white).This isn't a negative, but don't forget to go and select the GAIN setting to suit your setup. The default was not appropriate for me.

So far I was more into using some high-end mobile devices for listening music and This is my first time I thought to use a dedicated DAC/AMP for headphones. To my surprise this little wonder from Fiio have performed beyond my expectations. It has kickass soundstage, excellent flat response and mind blowing power. Wish it had auto power down feature when not in use. But other than that K11 works flawless for your needs.

Absolutely happy with the performance of the product, there are a few glitches with the software but I am expecting them to be ironed out soon. Tested the single ended output with HD 650, HD 300 pro, HD 569, MDR 7506, SHP 9600, source was Apple hi res Lossless and lossless via iPad through usb c and lg Oled tv with optical input.I am impressed by the quality and neutral sound of this product.Power output is enough to drive the HD 650, would love to try the balanced output once I get the balanced cable. Got an ifi 3.5 mm to 4.4 mm to use the balanced output but unfortunately it has the exact same volume as the single ended output, maybe it’s a product limitation.Please make sure you use this with a high quality audio source otherwise you will not be able to ... MoreAbsolutely happy with the performance of the product, there are a few glitches with the software but I am expecting them to be ironed out soon. Tested the single ended output with HD 650, HD 300 pro, HD 569, MDR 7506, SHP 9600, source was Apple hi res Lossless and lossless via iPad through usb c and lg Oled tv with optical input.I am impressed by the quality and neutral sound of this product.Power output is enough to drive the HD 650, would love to try the balanced output once I get the balanced cable. Got an ifi 3.5 mm to 4.4 mm to use the balanced output but unfortunately it has the exact same volume as the single ended output, maybe it’s a product limitation.Please make sure you use this with a high quality audio source otherwise you will not be able to realise their potential.