The TDK WR700 headphones employ Kleer wireless technology that operates in the 2.4GHz range, similar to WiFi and Bluetooth but with 16 different channels that can dynamically switch to ensure a consistent audio stream with fewer wireless dropouts. TDK states that the wireless operation is usable to 33', far enough to allow free movement within a fairly broad range. Kleer also enables transmission of lossless 16-bit, 44.1 kHz audio, equivalent to CD quality audio.
The WR700 consists of a small wireless transmitter that connects to the headphone output of an audio device and the headphones with a built-in receiver. Each device uses two AAA batteries (included). When both units are powered on the transmitter connects to the receiver and begins streaming audio content. The system permits as many as four headphones with a single audio transmitter.
The right ear of the headphones has an easy to reach volume control so you don't have to adjust volume on the amp or source.
Headphone listening also allows more critical evaluation of the sound quality since the room is not a factor. In this way, I found the TDK WR700 wireless headphones to be an excellent choice for critical music listening. They combined fullness and depth in the bass with clarity and detail in the mids and highs. The overall balanced sound quality of the WR700s came through in all genres of music and all volume levels and they easily handled moderate to high volume listening without breakup or distortion.
In my view, the wireless is just a bonus. I like the sound of the WR700 headphones even without it, but I like the freedom of not being tethered to the player.
The cushions fit tightly enough around the ears to screen out moderate external noise and remain comfortable for long periods of time.
The stated range of 33' of the WR700 is an accurate spec based on my tests. Beyond 33' the wireless signal simply drops out. However, since it is a digital signal it doesn't fade, it ceases to exist. This is a good thing - I prefer a complete drop out to static and noise, which is hard on the ears (and annoying) when an analog signal begins to fade.
- Driver: 34mm
- Frequency Response: 20 Hz – 20 kHz
- Sensitivity at 1 kHz: 106 dB +/- 5 dB
- Transmission range: 33 feet
- Price: $129.00