I recently purchased an ADI 648 demo from a retailer. It arrived today. Its faceplate is painted grey. the units I have seen advertized all have blue face plates. Is there any difference mechanically between these greyfaced units and the blueface units?
From the current manual. This is what the blue face one with the ver 2.5 firmware have.
The ADI-648's main part has been realized using programmable logic. By exchanging a little
component called EPROM, both function and behaviour of the unit can be changed at any time.
At the time of writing this manual, the unit is shipped with firmware 2.5. This firmware is not
compatible to older units, which do not have the REMOTE key. The firmware version is displayed
after power on by the AUDIO LEDs for about one second.
Since firmware version 2.5 not only ADAT input 8, but also the current Matrix configuration influences
the output mode. If MADI output group 8 is assigned to any input, the device generates
64 channel format. This is also true when MATRIX STATE is set to OFF. As this channel assignment
is factory default, all ADI-648 with firmware 2.5 will generate 64 channel mode as
default mode. To activate the 56 channel format for the MADI output, the MADI output group 8
has to be set to Mute, and no signal must be present at ADAT input 8.
Not sure if any of these features are important to what you are using it for or if there are any other differences not listed. Matthias or Stephan an probably answer that.
I'm assuming this was sold a B-Stock not as new?
Chris Ludwig | ADK Pro Audio