Beyerdynamic T 51 i and T 51 p On-Ear Sealed Headphones
Quite a few years ago now I reviewed the Beyerdynamic DT 1350 ($289) quite positively. This headphone is sold into Beyer's pro audio distribution channel, primarily to DJs. Subsequently, Beyer produced a T 50 p to sell into their consumer channel that looked quite similar, but didn't have the split headband. It didn't sound nearly as good, either...I was bummed. Then, a couple of years ago, Beyer updated the model to produce the T 51 i, which I heard at a show and thought sounded quite a bit better than the T 50 p. After years of hounding them at every show they finally sent one my way.
New England Audio Resource's NEAR-50M is a cyborg: metal innards in a wooden body. It represents NEAR's top statement in the firm's Metal Diaphragm Technology speaker line, which features the "NEAR-Perfect" driver cone. Metalin this case an anodized aluminum alloyis much more rigid than paper or plastic. Hence, a driver with a metal cone acts more nearly as a true piston. When it comes to loudspeaker cones, breaking up is not hard to do. When that happens, the cone flexes in a complex pattern, generating harmonic distortion. A typical plastic or paper 8" woofer may experience its first breakup mode at a frequency as low as 500Hz. The NEAR 8" metal-cone woofer's first breakup mode is said to be well above 2kHz, and their 4" metal-cone midrange does much better than that.