Of all my amps only 2 support xlr.The rest 4.4. It's als possible to buy a converter from 4.4 to 6.3 ,3.5 or 2.2 if necessary. Also it's easy to find on AliExpress or Amazon some 4.4 cables. So me i would buy 4.4

Really like the x3 for watching movies. Spacious and comfortable for long time

Soundwise they are probably the same. But more amps(specifically portable )will support 4.4mm

One reviewer said the ess version had a bigger soundstage. I have the akm version and i don't know if i would like a bigger soundstage. It's sounding perfect for me. No to distand not to far or spacious

The clipping is not very hard. Mostly at the end ot the decay of the notes you hear a very low click. Don't hear this in busy tracks only in lesser dense tracks

Same problem here. It is like the k9 pro have a problem with this kind of low notes. Noticed it in several other tracks with low piano notes or similar synth soun Fall for you. Leela James. /It's love. Jill Scott/. Could . Elderbrook...... It's not a cable issue. The same trough bluetooth...

Same problem here. It is like the k9 pro have a problem with this kind of low notes. Noticed it in several other tracks with low piano notes or similar synth sounds

Mine gets warm not hot.

You have to order it with fiio. Look in this thread for details. It's free

I think on Mac by checking your usb connections. Maybe also on pc

Did you set the k9pro to high gain?

Turntable needs a preamp

I burned in the x3 for some days and the highs got really smooth

Change th There is a left and right side cable. Switch cables.

Some people talk about volume drop. I never experience this. It's probably something caused by your connected device .

Don't think so. only window downloads. But mine is running great without any updates. Using Bluetooth, usb (connected to phone) and coax.

Don't think the streaming is the problem. If i use a external amp there are no clicks. So probably amp problem. Soundwise i like it alot. Tried with many headphones and and iems. Never sounded cold. Very 3d like on some off them. Detailed too.

Made connection with another headphone amp with the aux out. No clicks. So it's probably the internal amplifier causing the problem

Also have the clicks. They are there with Bluetooth and usb connection. Listening direct from gsm no clicks. Sounds like some digital clipping