I've been testing the coverage ratios for The Wet Look speaker cone treatment from parts express.
Since I didn't see anythjng on line about it, I thought it would be a good idea to share the reults of my findings.
I used a blank sheet of standard white 8.5 x 10" ink jet printing paper to determine coverage, how much coating is needed to cover the white surface.
I used a lab scale to weigh the paper and coating bottle before and after application.
The test surface was 150 cm2, which required a min of 2.5 g liquid coating to fully cover the paper so that no white surface is visible.
The 2.5g of liquid dries to 1.3g final weight. Thats about 50% loss of mass once its dry in 20% ambient humidity.
The final added mass is 7 - 9 mg per 1 cm2 surface once the coating has dried.
For full coverage treatment of variouss diameter cone drivers this works out to be -
4.0" cone = 0.320 g added mass
4.5" cone = 0.440 g added mass
5.0" cone = 0.560 g added mass
5.5" cone = 0.760 g added mass
6.0" cone = 0.960 g added mass
6.5" cone = 1.040 g added mass
7.0" cone = 1.160 g added mass
7.5" cone = 1.300 g added mass
8.0" cone = 1.560 g added mass
9.0" cone = 1.810 g added mass
10.0" cone = 2.720 g added mass
12.0" cone = 4.000 g added mass
These are all approximate amounts.
Deduct for phase plugs and wide surrounds.
Add for deep cone profiles.
Add for "thirsty" cones
Since I didn't see anythjng on line about it, I thought it would be a good idea to share the reults of my findings.
I used a blank sheet of standard white 8.5 x 10" ink jet printing paper to determine coverage, how much coating is needed to cover the white surface.
I used a lab scale to weigh the paper and coating bottle before and after application.
The test surface was 150 cm2, which required a min of 2.5 g liquid coating to fully cover the paper so that no white surface is visible.
The 2.5g of liquid dries to 1.3g final weight. Thats about 50% loss of mass once its dry in 20% ambient humidity.
The final added mass is 7 - 9 mg per 1 cm2 surface once the coating has dried.
For full coverage treatment of variouss diameter cone drivers this works out to be -
4.0" cone = 0.320 g added mass
4.5" cone = 0.440 g added mass
5.0" cone = 0.560 g added mass
5.5" cone = 0.760 g added mass
6.0" cone = 0.960 g added mass
6.5" cone = 1.040 g added mass
7.0" cone = 1.160 g added mass
7.5" cone = 1.300 g added mass
8.0" cone = 1.560 g added mass
9.0" cone = 1.810 g added mass
10.0" cone = 2.720 g added mass
12.0" cone = 4.000 g added mass
These are all approximate amounts.
Deduct for phase plugs and wide surrounds.
Add for deep cone profiles.
Add for "thirsty" cones
Last edited:
@Moondog55 This Wet Look coating is more flexible when it dries and has better dampening properties than the standard PVA glue formula in Mod Podge and other puzzle coats.
I'd say its identical to Visaton LTS50 how it feels when goes on and behaves after curing. Dilution is recommended for larger cones to get more uniform, controlled coverage. Distilled water would be just fine for this purpose. I'd use no more than 20 % water for dilution.
I've used this Wet Look and LTS50 coating in very thin amounts on compression driver membranes. Its very affective for taming edge resonances on Ti membranes and others with sharp breakup peaks. The beautiful thing is it can be cleaned up and even removed with isopropyl alcohol, so its possible to experiment with various patterns and thicknesses on the same driver.
Another good use is for reducing the primary radial edge resonance on some rubber surrounds, even with Alu or other metal alloy cones as well as PP and fiber composites ie. CF or FG.
Its also very effective at controlling some resonance modes on spiders and the back of cones. Even just to increase cone mass without excessively suppressing the driver's top end reproduction.
I'd say its identical to Visaton LTS50 how it feels when goes on and behaves after curing. Dilution is recommended for larger cones to get more uniform, controlled coverage. Distilled water would be just fine for this purpose. I'd use no more than 20 % water for dilution.
I've used this Wet Look and LTS50 coating in very thin amounts on compression driver membranes. Its very affective for taming edge resonances on Ti membranes and others with sharp breakup peaks. The beautiful thing is it can be cleaned up and even removed with isopropyl alcohol, so its possible to experiment with various patterns and thicknesses on the same driver.
Another good use is for reducing the primary radial edge resonance on some rubber surrounds, even with Alu or other metal alloy cones as well as PP and fiber composites ie. CF or FG.
Its also very effective at controlling some resonance modes on spiders and the back of cones. Even just to increase cone mass without excessively suppressing the driver's top end reproduction.