fiberglass damping material at the back of my 12" CF...
replaced with sir nelson de leon's acoustic foam diffuser...
directly at the back of the driver...
testing....
after 3 straight hours of critical listening using my flac and wav test track files and foobar as player over musiland03 dragon,6L6 pp tube amp and 6h8 pre amp, the bass improved dramatically, it became tighter no sign of boominess, the ear piercing highs on some of my test tracks tamed and nabawasan yung forward sounding para tuloy lumaki yung listening room ko. Overall mas gumanda ang SQ nung dati nang maganda! Tama si sir nelson malaki ang effect nya sa lows pati ang highs mag iimprove ng malaki. Madami din lumabas na mga bagong tunog na di ko nadidinig dati, pati usapan sa background nung mga live na test tracks ko dinig na dinig. Ayos ito mga braders malaki improvement try nyo hehehe. lalagyan ko din yung box ng 10" ko. Thanks sir nelson de leon for letting us review your acoustic foam absorber malaki nga improvement sa SQ.