I´ve got a JBL 2204H in a SBB4 tuned cab right now and it sounds great. The deal is that I´ve got a 1x15 Glockenklang on it´s way to me right now and I will only need the JBL to give me some mids on bigger club gigs while the Glock will be used on it´s one in smaller settings. The SBB4 cab is made of MDF so it´s really heavy and I´d like to build a new cab from birch or pine plywood. I just thought that it would be a good idea to make a sealed cab for the JBL and add some lowcut filter. This way I can make a smaller/lighter cab which is my goal here (27 liters sealed vs. 47 Liters in SBB4). So is this a bad idea? Should I just build a lighter SBB4 cab? And how would I make a lowcut filter for this config? Is it even needed?