Aragon 2002 Pre amp to a Monitor Audio subwoofer

I thought the Aragon 2002 is a stereo power amplifier, No?
DO NOT use a 2 male to 1 female Y adaptor on preamp out and run a single RCA to the subwoofer, IT WILL DAMAGE THE PREAMP!

Connecting a preamp and power amp to a subwoofer:
http://www.gammaelectronics.xyz/images/stereo-review_sept_1995_subwoofer_f6.jpg

Or use a pair of RCA ’Y’ adapter on L and R output of the preamp:
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcR3ADmaeKeY2310rkP09Qx1oD5IJWTAXR4YQ80OST1iUAod...
use 2 pair of RCA interconnect cable, one pair to power amp inputs, another pair to subwoofer line inputs.
https://cdn.head-fi.org/a/20171.jpg

Something to consider:
Connecting a subwoofer to stereo preamp