IMBT4403 Transistor Manufacturer?

[WeAreAs1 at aol.com]

Hallo,

Does anyone know who manufactures this particular part?  It's one of the 
transistors used in the mic preamp in the new Mackie "1604 VLZ-Pro" mixers.  
I'm guessing that it's probably just a differently labeled 2N4403, but I'd 
like to check its specs anyway, just to be sure.  I'm thinking about building 
a couple of clones for myself.

Again, the part number is:  IMBT4403  (that's imbt4403)

It's a PNP transistor.  Mackie specifies a surface mount device, but I'll 
probably use the old-fashioned TO-92 version, if available.

BTW, these new Mackie mic pre's sound very good.  A noticeable improvement 
over their last versions (as found in their 8-Bus mixers).  I have the 
schematics, but I don't quite understand some parts of the topology, at least 
not yet.  I will scan and post it if anyone is interested in seeing them (or 
helping me analyze the circuit) - Let me know.

Best regards,
Michael Bacich