Tascam/Yamaha Dsubs
Usually, when people refer to a "Yamaha" DB25 or a "Tascam" DB25, they are referencing the pinout used inside the connector. Yamaha established a pinout that it uses with it's recording gear which is different from the Tascam standard.
Most gear utilizes the Tascam standard for their Analog DB25 connections. It is AES Digital where things start to change. Gear like RADAR, Protool and Tascam use the TASCAM standard for their AES DB25 connections, whereas Yamaha, Apogee and Mackie use the YAMAHA pinout for their AES DB25.
Tascam AES cables will NOT work with YAMAHA AES wired gear as the +, - and ground connections are all out of whack between the two formats.
AES dubbing cables can be made so that the different formats speak to each other, just make sure you flip one side of this kind of cable, as you will need the OUTS of one side to be talking to the INS of the other side and vice-versa.
To add a few more dregs to this little cup of coffee, manufacturers use different threadings on their DB25 connectors depending on country of origin. Tascam, Yamaha and Apogee use METRIC screw receptacles, where Protools, Mackie, LYNX and RADAR use American (4-40) thread screw receptacales.
Hope this wasn't too convoluted sounding. Just try making all these interconnects all day like we do here.
Chris Stubbs
Redco Audio