I've not seen many bases like this. However these are on the back on the guitar. On the bright side, it sounds amazing with a incredible tone. It is an active bass (9v batter in the rear) to help with gain.
YAMAHA TRBX304 Electric Bass Guitar W/Gig Bag Used Product Shipping From Japan
Yamaha TRBX304 Electric Bass Guitar Red (FREE & FAST UK POSTAGE)
Yamaha TRBX304 Electric Bass Guitar Mist Green, 4-String
Yamaha TRBX304 Electric Bass Guitar 4-String - White
Yamaha TRBX174 Electric Bass
Yamaha BB1024x Electric Bass Guitar - Tobacco Brown Sunburst
