The HD 25 SP are closed dynamic headphones for monitoring, recording and outdoor applications. They are a lower-cost alternative to the HD 25, featuring a simpler headband and a slightly different capsule design.
Features
Very lightweight and comfortable, even if used for long periods
High maximum sound pressure level
85 Ohm nominal impedance for universal compatibility
Tough, detachable steel cable
Neodymium ferrous magnet systems and lightweight aluminium/copper voice
