KRK Rokit 5 G4 studio monitors (pair), one faulty

Right speaker: fully working, sounds great, no issues. Left speaker: powers on and plays, but only at roughly half volume, even at maximum. I've swapped leads, tried new cables, cleaned it internally and done a factory reset, with no improvement. Sold as faulty, ideal for a repair project or for parts. Cosmetic condition: fronts and drivers are in good condition. The left speaker has some scuffs on the side panel and a ring mark on top. Normal signs of home studio use. Included: 2 x KRK Rokit 5 G4 monitors 2 x foam isolation pads 2 x power cables Key features: 5" Kevlar woofer and 1" tweeter, Class D bi-amp, DSP room tuning with LCD screen, XLR and jack combo input. Open to collection from Dublin 7, and you're welcome to test them before buying. No silly offers, the fault is priced in.