This bass guitar has Performance EQ active circuitry that gives instant access to the perfect sound for your playing style Mega Music brings you the best in Yamaha bass guitars - and the TRBX delivers professional bass style and tone. This is the TRBX304 bass from Yamaha, an affordable but super versatile and great looking bass with a Mist Green finish over a solid mahogany body, a 5 piece maple/mahogany neck, active/passive electronics driving a pair of ceramic humbuckers, a 1.5" nut width, and a high-mass die-cast bridge for sustain and solid intonation.