Originally founded in 1945 from a university research lab Sennheiser is of course a globally respected brand and have recently launched the Digital 6000 series as an addition to its pro wireless range. KitPlus were invited to a take a look together with a live music event featuring the system in Hannover last month.
Rewinding slightly to establish where the Digital 6000 fits in the range then wireless big brother, the Digital 9000, is a 4u 19" receiver with 8 channels often found in broadcast, on Broadway, in West End productions and no doubt musical theatres around the world. For the touring production community however the weight and size of the D9000 may be an issue plus if you have an 8 channel gig then you would usually put 2 channels on top for spare which is a challenge as you would need another D9000 8 channel mainframe, just for a spare. Enter the D6000...
The D6000 has the key benefits of the D9000 retaining the long-range mode (LR) and the proprietary audio codec, with a two channel receiver and either handheld or bodypack transmitters. Both transmitters are proprietary to this series but can be used with the D9000 and visa versa existing units from the D9000 used with the D6000. They are paired by infrared matching, with up to 8 receivers being daisy chained without the need for any additional antenna splitter.
While we're talking transmitters then let's talk power. The L6000 expands the D6000 series with a practical charging station where up to four modules can be fitted as needed with two charging ports each for bodypack or handheld transmitter batteries.
The D6000 receiver is fitted with a Link Quality Indicator that ensures that issues get seen before any drop-outs occur. If, as in difficult RF environments, the signal should get temporarily corrupted to such an extent that the transmission error correction can no longer repair it, the intelligent error concealment of D6000 sets in. It employs intelligent learning algorithms to replace the corrupted part, enabling D6000 to still transmit flawlessly where other digital systems may fail.
There are many challenges facing wireless technology and not least is the availability of channel space most notably in theatre areas such as Broadway where a production may require in excess of 100 channels, and that's just one production with others on the doorstep competing for frequencies. Sennheiser is adamant that channel density and the efficient use of the available spectrum is a top priority and the D6000 has been designed with this in mind.
In the good old days the frequency spectrum was open from 470MHz to 960MHz but those days have long gone with the upper area of the band no doubt to be reduced further with other competing technology and cellular needs in the future.