Sir..yong SPL na ibig mo sabihin ecompete mo yong set-up mo or want just a loud bass that will match to your front speakers? ano ang enclosure mo ngayon seald or ported?
tune or design your enclosure properly ma achieve mo yong goal mo and it will also sound great in low volume.. pero in SPL competetions and you want numbers(big score) on your certificate.. that would be another topic..LOL..





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