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10. Apply a second coat of topping compound covering
the entire surface of the speaker and all adjoining
surfaces.
11. Compound buildup on the active surface of the
speaker should not exceed 3mm (1/8”).
12. Detail the compound to minimize tool marks.
13. Allow each layer to fully cure. This can take 12–24
hours.
14. Build more coats as necessary to achieve desired
finish. Each successive coat should be thinner than
the last. The final coat should be a very light skim
coat application.
FINISH THICKNESS GUIDELINES
Sound quality and installation durability will be
adversely effected if finish materials are applied too
thick.
TOTAL FINISH THICKNESS FOR OPTIMAL
PERFORMANCE:
1.0mm to 1.5mm (3/64” to 1/16”)
MAXIMUM TOTAL FINISH THICKNESS:
3mm (1/8”)
Validate finish thickness using the Sonance DG-1
depth gauge (SKU 93491).
Do not use hard-setting or stiff materials over the
surface of invisible speakers, such as fast-setting
drywall mud (“hot mud”), genuine Venetian plaster,
stucco, metal panels, tile, etc. Use only flexible
materials to finish invisible speakers.
When using flexible sheet materials such as
wallpaper or veneer, ensure that the total thickness
of any drywall compound, adhesives, and the
finishing substrate itself does not exceed 3mm
(1/8”). For wood veneer finishes, use only 20mil
(0.5mm) veneer with paper backing.
