TDK WR700 Wireless Hi-Fi-Headphones Review
Review: TDK WR700 Wireless Hi-Fi Headphones
TDK was kind enough to send us a pair of high fidelity wireless headphones for review. These headphones feature transmission technology developed by Kleer, which is an uncompressed CD quality 16bit 44kHz digital connection, giving improved sound quality over analogue transmission. This also eliminates the sound quality degradation from lossy audio compression that Bluetooth and some other digital wireless headphones suffer from. The headphones include a transmitter just a little larger than a 9V battery which plugs into the headphone socket. Both the transmitter and headphones run on readily available AAA batteries.
In this review, we will check out how they perform against a pair of corded headphones, its features and how well it copes with everyday use such as sound quality, line of sight, distance from transmitter and battery life.
TDK was founded in Japan in 1934 and started off as a manufacturer of iron-based magnetic material ferrite, the recording material used in audio cassettes. In 1952 they started to manufacture magnetic tapes, followed by the more common compact cassette tapes in 1966.
Over the years they manufactured video tapes and blank recordable CD and DVD media and in more recent years, Blu-ray recordable media. Towards the end of 2007, Imation bought TDK’s recording business, which covers storage such as flash drives, optical storage, magnetic tapes and accessories, with its products bearing the "TDK Life on Record" logo.
If you would like to find out more about TDK, please visit their website.
We obtained the following specifications from the packaging:
Non-compressed Stereo Sound – Preserves original 16-bit 44 kHz-digital audio CD signal quality. Kleer does not compress the audio prior to transmission resulting in uncompromised quality.
Dynamic Channel Selection Minimizes Audio “Drops” – Audio streams in the robust 2.4 GHz ISM band. Dynamic channel selection allows the transmitter to monitor interference and switch to another channel if necessary.
10 Meter/33 Feet Transmitter-to-Headphones Range
Ultra-low Power Consumption – 2 AAA Batteries provide 30 to 40 hours of listening time.
Includes: Wireless headphones, 2.4 GHz transmitter, jack extension cord, storage case, plus 4 “AAA” batteries.
Sensitivity at 1 kHz:
106 ± 5dB
32 ± 10% ohms
What’s inside the box
Let us first start by taking a look at the retail packaging as well as what accessories the headphones ship with.
The following images show the retail box the headphones came shipped in.
Front Flap Opened
Right-Inside text Close-up
Left & Right Sides
Bottom of box
The contents of the package are as follows:
The retail package consists of:
- TDK WR700 Headphones.
- Transmitter with 3.5mm (1/8”) stereo plug.
- Short 3.5mm lead (for recessed sockets.)
- 6.35mm (1/4”) stereo adapter.
- Cloth carry pouch.
- 4 x AAA alkaline batteries
The kit includes everything required to get started, including the batteries. At a first glance, it seemed like there was something missing, as pretty much every pair of wireless headphones I’ve come across had a bulky mast/cradle, an AC adapter as well as leads and adapters to connect to the audio equipment. As clearly shown above, TDK’s kit does away with all these cumbersome parts, leaving just the headphones and the small transmitter unit, not much later than a 9v battery! No AC adapter is required either, as both the transmitter and headphones run on everyday AAA batteries. For those with Hi-Fi or studio equipment that use a 6.35mm headphone jack, this kit includes a 6.35mm adapter. A short lead is also included to cater for recessed sockets, such as on some flat-panel TVs.
Now let’s take a look at the headphones itself:
The following shows the outside of the ear cups:
The ear-cups are the type that sits on top of the ears, rather than around them. Each ear-cup can be individually swivelled, to allow for compact storage. While made of plastic, the joints appear to be quite sturdy and unlikely to give a problem over many years of use, unlike the flimsy joints we’ve seen on some headphones, especially fully collapsible headphones.
Now let’s take a look at the accessories:
These accessories and connections are as follows:
- Transmitter – Plugs directly into a 3.5mm headphones socket.
- 6.35mm Adapter – For connecting the transmitter to a 6.35mm headphones socket.
- Extension lead – For connecting the transmitter to a recessed socket.
- AAA Batteries – 2 for the transmitter and 2 for the headphones.
Now let’s take a look at the battery compartments:
Both the transmitter and headphones run on ordinary AAA batteries. While some people prefer rechargeable batteries, we much prefer equipment that run on commonly available battery sizes. Rechargeable AAA batteries are widely available and should the batteries run down unexpectedly such as while on a long journey, it’s just a matter of making a quick stop at a corner shop to pick up a fresh set of batteries. Also, let’s not forget that electronics that come with rechargeable batteries typically use non-standard sizes and these batteries typically have a lifespan of less than 2 years and are expensive or difficult to replace.
We will cover battery runtime tests later in the review.