Performance in an external USB2/FW400 enclosure
Welland ME340U2F, Prolific 3507 chipset with lastest FW dating from April 2006

Both the Premium and the Premium 2 work nicely in this external enclosure except for one common fault: Audio CD reading is limited.

Scan 1: Read transfer rate test, connected via USB2, Speed Read enabled, of an audio CD (42x max.) with the Premium.
Scan 2: Read transfer rate test of an audio CD with the Premium 2 (42x max.) and Read transfer rate test of an data CD (52x max). Both connected via USB2, Speed Read enabled.
Scan 2: Read transfer rate test of an audio CD with the Premium 2 (29x max.) and Read transfer rate test of an data CD (52x max). Connected via FW400, Speed Read enabled.