“ These are amazing. If you can get them for a low price, do so. They are a bit uncomfortable, so you might not want to use them for long periods of time. Their clarity is fantastic though, the bass while not being big in quantity is extremely accurate and with a decent amp (I'm using the 300 Ohm version of the headphones) it is just fantastic in quality. Despite being a closed headphone...” --FirsToStrike
“Expanding on the pros, other likes- - These cans are pretty comfortable imo, with the velour pads and soft headband. I havent had any problems with pressure points on the headband, and have been able to wear them for several hours on end without much fatigue. Clamping force is just right. Tighter than, for example, a Creative Aurvana Live, but looser than my FA-011s. Fairly light weight. -...” --kidcharlemagne
From an old MB Quart brochure (circa late 80s): The Quart Phone 50 Dynamic, semi-open headphone. Coupling: circumaural. Frequency response: 10 Hz - 22 kHz. Nominal Impedance: 120 ohms (x2). Sound Pressure Level: 96 dB. Rated Power Handling: 0.1 watt. Distortion <0.5%. Weight (without cord): 245 grams.
Item No. : CD-880 Product Name : Monitor headphones Features : *Exceptionally accurate acoustic performance with natural sound, designed for studio monitoring and mixing. *42mm driver with neodymium magnet & "CCAW" voice coil. *Balanced detachable cables, with screw-tight plugs. *"Breathable" protein leather ear pads bringing comfortable and long time...
MB Quart QP400 is top of the line semi-open headphone from the last MB Quart lineup. QP400 have cardamatic suspension that together with soft plush earpads make them very comfortable.