Do these panels actually reduce echo?

The slats sit on acoustic felt, which absorbs mid and high frequencies and cuts flutter echo in rooms with hard floors and bare walls. They help most in media rooms and offices; they are not a substitute for full bass treatment.

What is the difference between the regular and large height?

Regular panels are 94.49 inches tall, close to a standard 8-foot wall. Large panels are 118.11 inches, for taller walls or ceilings where you want fewer seams. Both are 25.2 inches wide and 0.78 inch deep.

How much wall does one box cover?

Each box holds two panels, each 25.2 inches wide, so one box covers about 50.4 inches of width at the panel height you choose. Measure your wall and round up for cuts and waste.

Can they go on a ceiling?

Yes. The panels are light enough for ceiling mounting, and the felt backing still absorbs sound from above. Plan fixings that suit your ceiling material.

Is the oak real wood?

The slats are American oak with a dyed veneer over a core, not solid oak blocks. The veneer gives the grain and color; the felt backing is made from recycled material.