both will actually work for you. Your A300 is a active bookshelf, you do not need external amp to drive it. You just need a line input then the speaker internal amp will amplify the signal.

Depends on how you want to play it.
WXA is an integrated amp (preamp + amp). If you are planning to upgrade to a passive bookshelf you can get WXA. The next time when you have a new speaker you do not need to get another amp.

If you want to have a dedicated preamp (which only focus on signal processing) - you can get WXC. Make sure you are plugging into AUX out not pre-out else you are just wasting your preamp. If you like this audio quality coming from this preamp you can keep it and get a WXA/other amp next time when you are moving to passive speakers

Lastly, i think you know that your A300 will work with direct connection to your media source with or without WXC or WXA

This post has been edited by kevinlim001: Sep 19 2020, 03:30 PM

its not the same beside there is an upgraded version aptX HD. This promised to deliver 24bits/48khz

the problem with Bluetooth, it will compress your audio before it reaches your DAC in your speaker for signal processing. Signal degradation may happen during the process.

Connection with usb will send the audio codec directly into the speaker DAC for it to process without compression. As long as the audio codec is readable/supported by your speaker DAC then it will work.

In short at this moment USB is preferable over APTX HD, if you own a decent soundcard then you can try to let the soundcard do the processing work and send signal thru RCA directly to your speaker AMP by passing DAC. See if you can tell the different between two.

if you already have a dac then try both method and see if you can tell any diff. If you have a good dac i will run it thru dac and rca it to speaker. I dont think A300 is having a good dac but certainly better than those on board soundchip.
what dac u r using?

i cant tell you for sure bro.. you gonna test it our urself. no harm right? You already got the dac and when you are going to have the A300 pro just try both method and see which 1 sound better for you. Both way will work its just matter of your preference.

let us know bro.. and remember to connect to A300 using the rca line out

maybe an airpulse a200 could be an upgrade for ur s1000DB.

https://www.crutchfield.com/S-G8TXEStrw6Y/c...F-KUBE-12b.html
KEF connection is limited to RCA in only. If you worry about the impact, with almost similar budget of KEF you can check SVS PB1000. You can do RCA input to SUB and RCA output from SUB to your active.

KEF 12B is a 12 inch sub vs SVS 10 inch but if you check their frequency range.. SVS PB1000 can dip lower and go higher freq (good for movies). If you prefer a seal sub (better for music), you can consider SVS SB1000 also.

vol control still is an issue because we are using RCA line output here.

yes if you tv support for RCA out then easy.. u can just connect RCA to subwoofer and rca from sub to a300.
but most modern tv had remove rca out option

vol control u only can control for a300.. u cant control ur sub vol.. it has to be done manually still

depends on your connection.. if you are using RCA connection then no.. if you are using digital input / USB then you have to rely on the speaker DAC to do the job for you