In both of the Sennheiser HD 2.30 models, the 4.5 ft cable terminates into a straight 3.5mm stereo mini-plug and is user-detachable - a terrific plus for easy cable replacement if needed. The HD 2.30 folding headphone frame is an extremely lightweight all-black plastic that appears extremely durable and well-built with solid hinges and a sliding earcup mechanism providing a very wide fit adjustability. The soft flexible headband is lightly padded for surprisingly good wearing comfort.
Despite the smaller on-ear dimensions of the Sennheiser HD 2.30 series, most of our headphone.com reviewers were able to obtain a stable, secure fit on the head that allowed for excellent portable and active use without fear the cans would suddenly slip off the head during movement. Given the pleasantly non-squeezing clamping force of the headband, we have to give kudos to the Sennheiser materials lab for the excellent execution of the HD 2.30 excellent fit ergonomics.
Sonically, the Sennheiser HD 2.30 presentation is impressively clean and rich with strong emphasis on the low-mids designed to warm up chilly low-bitrate online music from streaming services or YouTube. The clarity in the treble ranges is quite good for the headphone type & price and it avoids sharp glare or harshness in favor of a slightly rolled-off, pleasantly rounded tone that still manages to convey good detail and musical body without a restricted or muffled-sounding extension. We could maybe ask for more well-centered midranges where we hear the vocals tending to slightly fall back into the mix with certain recordings, but as the song goes, you can't always get what you want - at least not everything for $89 bucks!
The Sennheiser HD 2.30 on-ear headphones are rated at 22 Ohms and 115 dB sensitivity so they'll play loud and proud from any Apple / Android smartphone or other audio device. A handy storage & travel pouch is included in the HD 2.30 package. The strong 2-year Sennheiser manufacturer's warranty covers you in case of any issues only when proof-purchased from true authorized Sennheiser dealers - like us right here at headphone.com since 1995!