Our water treatment is an industrial chemical that we purchase commercially by the gallon. It is a toluene, base which is a strong solvent, and it is applied to the paper cone of the speaker. It saturates the entire cone and pushes the chemical through to the other side. We let the speaker out-gas for 24 hours and then repackage it. You can place the speaker under running water, and not a drop will stick, it is quite amazing! Also, it adds a negligible amount of weight to the cone body therefore not changing the sound of the speaker at all.
The PA690.4 is a mid-bass/mid-range loudspeaker, excelling in the lower-mid and mid-range frequencies. These 6×9 speakers are designed to produce a very loud and accurate vocal reproduction of your music without sounding harsh or brash. Perfect OEM replacement. Sold each and can be marinized at an additional charge. Sold individually.