Mods for Avantgarde speakers

hello. im the owner of an old uno series 2, and i just opened the woofer cabinet just to see if i can do something about the hum and pop when I switch the woofer off when i discovered a whole bunch... well, ill just let the photos say it...

https://ibb.co/R9GBWsw
https://ibb.co/4R3Bffp
https://ibb.co/Hx8Kwxs
https://ibb.co/ZKKGY5z
https://ibb.co/qMsy9qX
https://ibb.co/MBfpTw0

All the cabinet walls has some dried glue marks on all the surfaces, and nothing else. Looks like they use egg crate foam. My question is, can I replace the foam with those normal egg foam for the room which is similar looking to the one inside the cabinet?

Or if someone did it before, do you line it with felt first before putting in the egg crate foam? Any tangible improvements?

Hi

An old post but hopefully someone here can help! I have Avantgarde Duos without the Omega upgrades and am looking for the values for the crossover components or a circuit diagram. My crossovers were upgraded by the previous owner with audio consulting components but I am finding the high end to be a little too relaxed for my taste or more the sound is very "honky" at louder volumes.

Thanks

Hi Mjhill,
Capacitor 2.8uf
Inductor 0.68mhy

i used Miflex Copper 600v as the new 250v was not available at the time plus I now bypass with Duelund JDM 0.01uf Sn/Cu cap.
the inductor is Jensen copper foil. 
Unfortunately the big copper cap is too big to go inside the tube so I mounted it externally. I could have built an external box but it just seemed easier for me. Perhaps the smaller 250v cap will go inside the tube.

Big increase in naturalness and frequency extension without glare. 
I also changed the binding posts while I was modding and damped the tubes. For completion sake I installed SR Blue fuses in the subs.
Would have liked to recap the bass amps but a bit beyond my skills.

cheers
DRD45