This round reflex port tube sponge is a must-have for anyone looking to upgrade their speaker system. Its construction allows performance, while its ability to filter and waves enhances audio output. Ideal for use in subwoofers, loudspeakers, and guitar amps, it provides a noticeable improvement in sound quality. Features -Color:Black -Material:sponge -Size:6.00X6.00X5.00cm/2.36X2.36X1.97in -Enhanced audio performance: the loudspeaker port tube sponge significantly improves the audio performance of your speakers, providing a listening experience -Noise reduction: the reflex port design effectively reduces noise, allowing a clearer and more enjoyable audio experience -Robust materials: crafted from sponge, this voice outlet port tube sponge allows durability and performance -Easy to replace: this set includes two sponges, making it easy to replace and install, allowing your speakers are always in top condition -Improved bass reflex: by increasing the bass reflex port, this diy loudspeaker port sponge enhances the bass performance of your speakers, delivering a richer sound Package list: 2 x port tube sponges