I also don’t think the power cord to your turntable is gonna do the trick. Looking at your system it’s hard to see it sounding bright. I’ve read the 2M Black can sound harsh if not set up optimally so that’s definitely something to check. If your ‘table doesn’t have sufficient adjustments (like VTA) that might be the source of the problem. Frankly, a $740 DJ turntable seems out of place in your system to begin with, and I’d look to upgrade that regardless. With a $400 budget I guess you could try some tube rolling somewhere as a bandaid, but that turntable/cartridge sitch would be the first thing I’d check out. FWIW, and best of luck.