speaker adapters used to install aftermarket 6.5" speakers,
I installed Audison prima 6.5s in all 4 corners of my xpower as well as sound deadening, Audison tweeters, prima AP8.9 amp and subwoofer,
I recommend using this type of foam tape, I used 10mm thick version and it was hard to get the door cards back on so I would use 8 or 6mm if I did it again:
https://www.amazon.co.uk/dp/B09Z6MY8DF?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1
Also would be best to use some thin foam gasket between adapter and door to get a good seal
HIGHLY RECOMEND PRINTING IN ABS OR PETG (as it gets quite hot in the interior of cars and PLA probably wont hold up over time)
The author marked this model as their own original creation.