FiiO K7/K7 BT input, output and gain introduction

FiiO K7/K7 BT introduction page:

[XboxmIRC]

Love my FiiO K7. Tons of power for my HD 6XX and good sound.

[BolcheBric]

Simple, clear explanation of interface, 2min, thanks a lot. Would like that competitors does the same.

[superkai]

Can I connect by turntable via Bluetooth and have the audio play through either PO or Pre?

[madMARTYNmarsh]

The FIIO K7 BT would have been perfect if it had bluetooth transmit and receive. I understand why it doesn't have it, but it would be nice to have the option as I regularly need to use my Sony XM5 headphones early hours so I don't eake my wife and kids. It is only during daylight hours that I can use my open back headphones. Bluetooth trasmit and receive would remove a few minimal steps when I swap between headphones.
My K7 BT arrives tomorrow. I hope it is as good as it seems to be.
I almost bought K11, but I want balanced audio and the K11 doesn't appear to have that.
I'm a big fan of Fiio design asthetic, bravo on that. They look classy and fun, but not obstuse or intrusive.

[teknolojigundemi]

Your website Windows 10 USB driver download was so slow. Also I couldnt find any info about 4.4 mm input pin layout. I will buy custom cable for my headphone and i didnt find any info in quick start guide. Please inform us your 4.4 pin standart. Regards.

[PropaneWP]

Is it possible to use all the features of the K7 with a Linux operating system?

[seainc]

Hi, Audio source is a PC, using K7 as DAC. Should K7 come before or after the BTA30 Pro? Thanks

[RasierapparaT]

Can I connect AirPods to the K7 BT in order to use the AirPods with my Windows PC? 🤔

[blackneblina]

Where is the 24 bits output option in Fiio Control Panel? I would like 24 bits since I don't have anything in 32 bits, just to avoid dithering. However, there is a lot of quality and power in this dac amp here

[RiceWitchR]

I know what po is but what is pre and lo