Figured as much, looks like the other Korean half-bridge out there but the pricing is definitely better then other places even the CAB 4500.1 is now 900 bucks and originally was 599.99. They look to be the same amplifier from what I am seeing of the guts.
I was planning on a Soundqubed 6k but I paid $999 for my Soundqubed 7k a few years ago and the 6k is $1200 now...
I choked when I saw the current CAB 4500 price.
The Ruthless 4500 dynoed over 6k at 1 ohm and 15 volts.
Ruthless is full Korean, 30 pounds, dual inputs, and 2" longer.
CAB is Chinese, 20 pounds, and single inputs.