[Video] Street Fighter V player Alex Myers unboxes and reviews a gift from Massdrop – the Koss Porta Pro X Headphones! 111dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source. has a neodymium magnet. Apple Earpods. Koss Porta Pro Wireless. Devices with neodymium magnets are lighter and more powerful than those which use ferrite magnets. Product Description. For the objectivist audiophile seeking a complete desktop solution, there’s the Massdrop O2 + SDAC: a DAC/amp that brings two great products together in one affordable, easy-to-use package. It features the Massdrop Objective 2 (or O2), the community’s favorite solid-state amp, alongside the Massdrop x Grace Design Buy Massdrop x Koss Porta Pro X On-Ear Headphones — Noise-Cancelling in-line Microphone, Activate Voice Assistant or Skip Tracks with in-line Remote, Collapsible for Maximum Portability (Midnight Blue) with fast shipping and top-rated customer service. Massdrop x HIFIMAN Edition XX Massdrop x AKG K7XX Massdrop x Beyerdynamic DT 177X GO Drop + MrSpeakers Ether CX Massdrop x Koss ESP/95X Electrostatic System ; Driver / Design: Planar Magnetic / Open-back : Planar Magnetic / Open-back : Dynamic Transducers / Open-back : 45mm Tesla neodymium technology : Planar Magnetic V-Planar Technology ON-EAR HEADPHONES FROM AN AUDIO LEGEND In the 1950s when rock ‘n’ roll was sweeping the nation but headphones were still largely reserved for communication purposes Koss came along and changed everything by making the first stereo headphones designed specifically for personal music consumption Since then the company has continued to bring listeners closer to the music they love and among Massdrop x Koss Porta Pro X On-Ear Headphones — Noise-Cancelling in-line Microphone, Activate Voice Assistant or Skip Tracks with in-line Remote, Collapsible for Maximum Portability (Midnight Blue) Koss Porta Pro Utility On-Ear Headphones, Detachable Interchangeable Cord System, Collapsible Design, Stealth Grey The 660 doesn't have a wide soundstage, probably more narrow than the 599 but not by alot. The ESP will have less bass impact than the 660. You'll probably want to use EQ to get the most out of the ESP. Some people have had problems with a hum from ESP but Koss have a lifetime warranty. Retro budget audiophile. These are such awesome pair of budget headphones. The comfort is great and so is the sound quality, I personally found it to be a bit too muddy in the 100-250 Hz, but you can easily EQ' it. The Porta Pro's would be my recommendation for starters, you can't deny the value for the price. Drop exclusive price and reviews: Beyerdynamic DT770 Pro Headphones Massdrop x Koss KSC75X On-Ear Headphones $20. Cayin RU6 Portable USB DAC/Amp Dongle $189 IlDXtuk.