Quoted from MLmotorsport:Would also consider Pinwoofer GT.
Hey MLmotorsport ! It's been awhile - hope your MMr is still jamming good with the V2 PinWoofer system!
TOTAN is a great sounding title owing to the later / better WPC95 audio. Albeit mono, you still have a ton of potential on WPC95. Keep in mind that the later Whitestar and SAM titles are mono as well (Star Trek, Tron, ACDC, Metallica, etc.), and for the most part those platforms sound amazing. I would not let mono deter you from adding our amplifier and speaker upgrade.
As you probably know replacing the speakers alone leads mostly to disappointment. Adding our GT amplifier is key to liberating the backbox, plus you'll get great bass out of the cabinet just like MMr.
Here is the recommended system:
https://pinwoofer.com/pinwoofer-gt-8in-5-25in-wpc95-super-kit/
You can cut power to the speakers, and then route headphones using the line out on the GT amp which works well at nominal volume levels. If you want to run your headphones a bit louder, we can advise you on an aftermarket setup that won't cost much and will be straightforward to setup.
Have fun and good luck!
Dan
+1 208 855 0346