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Echo Drop X2010 panels,
shown below, absorb and diffuse sound. One inch deep, one inch wide wells cut on a two inch thick Echo Drop 2' x 4' panel.



PEPP Echo Drop Panels

Porous expanded polypropylene panels, or PEPP for short, are perfect for soundproofing indoor and outdoor areas. Our Echo Drop acoustical panels are made from a dense polypropylene polymer that expands to form small beads packed tightly to dissipate sound. These moisture, bacteria, fungus and fire-resistant panels come in a wide range of designs to accommodate any style and are available in white for indoor and charcoal either indoor or outdoor soundproofing. Whether you need PEPP panels for a small sound studio, conference room, large gymnasium or even an outdoor firing range, our Echo Drop soundproofing panels are more durable, look better and last longer.


Buy our Echo Drop soundproofing panels individually or by the case to take advantage of our affordable prices. These panels can be cut to fit virtually any space and are easy to install. Order now to take advantage of our affordable prices and fast shipping on all orders.

Echo Drop Features

  • Class A fire rated
  • Up to 13 STC
  • Up to 0.75 NRC
  • Water resistant
  • Moisture resistant
  • Impact resistant
  • Indoor or Outdoor (charcoal only) use
  • No fiberglass, non-fibrous
  • Tackable surface