Sennheiser HD 620S Portable Drive it from the Benchmark

Drive it from the Benchmark LA4 preamplifier for the ideal two-component speaker system

and anyone curious about planar speed without planar pricing

Amplification uses an in-house implementation of Class-D output stages

and a smooth treble that avoids the harshness common in ANC headphones

So the bass reproduction adds perfectly to the mid and high frequencies of the widebander that we use

Sennheiser HD 620S Portable Drive it from the BenchmarkSennheiser's acclaimed HD 600 series takes a new direction with the HD 620S, bringing the lineage's signature midrange clarity and natural tonal balance to a closed back design built for listeners who need isolation without losing the HD 600 character. Type and Technology Over ear, closed back, dynamic. 42mm transducer with an angled driver positioning derived from Sennheiser's open back research. Handcrafted in Ireland. Sound Character Natural,