Grado SR80x Prestige On Ear Hi-Fi Headphones Sumiko MM Cartridge and these essential traits are

and these essential traits are necessary for the sound to be convincing and engaging

-Internal port vents into a small chamber containing a second reflex port tuned as a system to 24Hz

From its over-sized

They are stable due to their wide base and can be used 'as is' directly under items (point down) or if moving the items regularly double sided tape or blue tak can be added (not included) to hold them in place (they are not threaded)

- Xpression III Comfort

Grado SR80x Prestige On Ear Hi-Fi Headphones Sumiko MM Cartridge and these essential traits areThe SR80x is the second model up in the range and is very highly regarded. It maintains the simple 'rightness' of sound that the remarkable SR60X has, and primarily adds a bit more resolution to the sound. Product Specifications: Transducer Type: Dynamic Operating Principle: Open Air Frequency Response: 20 20,000 hz SPL 1mW: 99. 8 dB Nominal Impedance: 38 ohms Driver Matched dB: 0. 1 dB