嗯嗯 ...引述下面這段話應該就可以知道了:

Here's some news from Ian regarding the Benq 1620 4X +R DL issue:
[q]Good news. Here's what our contact at BenQ said:

It's true that BenQ is working for the 4x DL writing firmware for DW1620. After firmware upgraded, the specification of it (DW1620) is the same as DW1620 Pro which is going to launch next month.

Apart from the 4x DL and bundle software (Nero Suite), the retail packing is the only difference between DW1600 and DW1620 Pro. The production for DW1620 will be stopped once DW1620 Pro is ready.

Consider to the DW1620 users, there is a FREE firmware for such upgrade
which likes the FREE firmware for DW1600 upgrade to DW1620. In a word, both DW1600 and DW1620 users can enjoy the new specification (4x DL) of DW1620 Pro via an easy FREE firmware upgrade. [/q]

是完全FREE而且不需要任何破解或動手腳就可以讓1620->1620 pro ...也就是2.4x DL 可以直接變成4x DL ...當然，1600透過FIRMWARE到1620，也就跟1620一模一樣了...當然也可以到1620 PRO，讓我們等待BENQ正式RELEASE出來的佳音吧