Thanks Steve,

I have seen linkwitzlab site but I was not aware he uses XXLS (I know he used XLS for Thor subwoofer)

I have searched Internet trying to find someone who has used XXLS in ported application as suggested in Peerless homepage - but I could not find anyone tried that yet. Perhaps because XXLS is rather new.

At this moment I have Scanspeak 8656 10" in 60L sealed, but, my XO is rather low (XO=80Hz) and for that application I suspect the are more suitable heavy duty elements around. XXLS 10" will fit in to small box which means I could re-use my exisitng enclosures (made by concrete) even when changing from S-S sealed, to XXLS ported.

Peerless also have XXLS-versions for sealed but, it seems they require liitle bit larger box than 60L

Anyway, I am concerned whether one of those XXLS would be good enough for Music, to match with my Fostex F200A mains

LageB