It would seem so:
"The most common mistake in SCSI termination is assuming that the SCSI controller itself doesn't count; in fact, it does count as a device, and the termination rules apply to it just like other devices. Many Amiga controllers have the termination resistors soldered into place, under the assumption that only internal or only external SCSI devices will be attached. If both internal and external devices are to be used, it is necessary to remove these resistors. Soldered-in terminators can be desoldered or simply cut out. Sockets may be soldered in their place to provide the greatest versatility, or you can just use external terminators. "
As mentioned above I have used 2091 before for both internal and external devices and it has worked flawlessly. I have never had to remove the internal termination. My coments were more about the dangers of unsoldering compents from old hardware and premature termination.
