So, I picked up a KR4 which was ordered with the 7.5 amp driver and W2 leds. My main interest was that the leds were replaced by ST-20 4000k FD2 emitters, boy are they nice! My question regards the driver, is that driver regulated to 7.5 amps with a FET top end or is it 7.5 amps period? I has better output than my old D4V2, also with SST-20 4000k emitters. I have not been able to figure out how to hold everything to get a current reading from the light and I am very curious.
Hank’s drivers have been discussed to death regarding firmware, but not so much about hardware around.
The drivers are all the same, just with different Vsense values (different R3) for 5A, 7.5A or 9A linear constant current channel.
Then the FET channel can be enabled or not in firmware.
For a quad CxLPM1 I would assume that it comes with the FET channel enabled, unless you specifically requested it to be disabled.