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Can you guys help me understand the differences?
Edit: going to answer my own question...
I know LLT is tuned 15hz or lower and it's a large bass reflex. Due to low port tuni g, does not need a hpf. Acts like a ported enclosure above tuning, like sealed below it. Needs less power. Trade off is you get more extension in echamge for SPL at higher frequencies.
SLLT is Structural LLT, so it's built in like an Infinite baffle except it is a tuned bass reflex.
EBS Extended bass shelf -3 or -6.... Not sure on these...yet
Edit: going to answer my own question...
I know LLT is tuned 15hz or lower and it's a large bass reflex. Due to low port tuni g, does not need a hpf. Acts like a ported enclosure above tuning, like sealed below it. Needs less power. Trade off is you get more extension in echamge for SPL at higher frequencies.
SLLT is Structural LLT, so it's built in like an Infinite baffle except it is a tuned bass reflex.
EBS Extended bass shelf -3 or -6.... Not sure on these...yet