With 40mm drivers, neodymium magnets, and CCAW (copper-clad aluminum wire) voice coils, Roland RH-200S stereo headphones offer the clarity, sonic accuracy, and comfort needed for mixing and silent practice. TRH-200S Headphones also feature a gold-plated 1/8-inch stereo connector with 1/4-inch adapter, plus a high-quality cable with built-in strain relief.