In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. The ATH-M40 features a flat, extended frequency response; field-replaceable cables, drivers, and ear pads; 1,600mW of power handling; high SPL capability; 40mm drivers with neodymium magnets and CCAW voice coils, and rotating earpieces for easy one-ear monitoring. Weight (without cable): 8.8 oz.