FiiO K7 Balanced Headphone DAC/Amp

Great little product

Small feature rich powerhouse

Bought this amp to drive HiFiman HE400se and HD6XX mainly. It has plenty of power on low gain. I can't detect any noise in my headphones. I like that it has preamp function. For the price it's all I need. I have it setup beside my Lazy boy so I can adjust the controls at arms length. What would make this great if it had a bass adjustment at 20hz-40hz something like Xbass. It's odd that the power doesn't really kick in until about Noon on the dial, but sensitive IEM it's at 9 o'clock.

K7 Clean Machine

I’ve been using the K7 for a number of weeks now. There’s a lot to like for $200 bucks and a few things not to like. I connect to laptop to usb input and use K7 to power Meze 109 Pros or Sundaras at my desk location. As context, my main listening station is using SMSL SU-9 and Topping A90 D to power HIFIMAN XS or Meze 109’s. A very different level of sonic balance and technology. Enough backdrop. Sound is ultra clean, transparent and musical. Could use a bass boost switch. Tone is pure, accurate with a hint of clinical focus, likely due to THX 788 amps used internally. I am replacing a Grace Designs M900 and the K7 at almost 1/3 price is clearly better sonically, especially in mids and treble region. But, I miss the sleek, low profile footprint and ergonomics of volume knob. Grace has, well, grace. K7 physical presentation is a black metal clunky box. Must be something in between. Others have pointed out the K7’s volume knob is calibrated oddly. It is true you have to spin up the volume knob to 2-3 o’clock position to get enough juice to drive even the efficient 109’s. Annoying, uneven but again your at $200 level. I like it, don’t love it. Gives me an ultra clear THX 788 sound with a very good DAC for the price point. I am surprised that the physical, clunky black box, read non- design appearance keeps bothering me. Maybe the disconnect is that it delivers beautiful sound, not remotely on par with my main rig mentioned above, bit looks a little in the utility, ugly black box. They should have spent $25 on better casing and footprint. What else would I have considered in hindsight? Maybe the Topping DX5? Would I recommend it overall? Yes. If it’s all about sound, definitely.