Well, I want to point out the DigiFi Opera S1 isn't really a 'new' news. It has been around the U.S. market for 2 months now but little attention was paid to it. However, a recent post on Engadget suddenly stir up quite an interest on this wireless IEM and before you know it, it is out of stock EVERYWHERE! There are actually two versions of the Opera wireless IEM, the S1 and S1+. S1+ is said to have a better SQ than S1, but there isn't much to go on as it is (DigiFi is an Korean company, and unfortunately its site seems outdated and worst of all, not in English). Opera S1 / S1+ utilize Kleer wireless technology for transmission. Music is transmitted in uncompressed format so no sound deterioration occurs during the process. The technology seems promising but so far it is slow to pick up by the industry - and some of the few who did pick it up offer it at such a high price, most consumer would probably just settle for lesser technology like bluetooth. This most likely explains why Opera S1/S1+ sold out that fast - because DigiFi priced them just right. MSRP US$110 (S1) / US$130 (S1+).
- Driver unit: 13.5mm dynamic transducer
- Frequency Response: 20Hz~20 kHz
- Impedance: 32 ohm
- Sensitivity: 98dB / 1 mW
- Plug: 3.5mm
- Cable length: Wireless
- Range: 25m (indoor)
- Operation time: 9~10hours (recharged in 2~3hours)
- One transmitter can pair up to four receivers (earpieces) at the same time.