3MAX Custom-Fit EarphonesSound Signature: clear, full range response with enhanced bass Drivers: 3 balanced armatures: 2 lows, 1 high with single crossover Custom in ear monitors designed for those who like the punch of a little extra bass. Flexible soft silicone earpieces deliver long wearing comfort and perfect fit for maximum isolation and a secure seal. 3MAX delivers clear, full range response with a seductively enhanced low end.