yamahaladstoke,

Good job on your Ketron SD5 review ... I just wanted to mention that the speakers were initially set at 'flat' from the company; however, there is an internal Bass Boost circuit (function can be accessed from RIGHT MENU - BASS BOOST (F9) and FREQUENCY (F10). These can enhance the bass out of the internal speakers and the frequency to enhance can be set. These settings can be saved under POWER ON SETUP so when next you turn on the keyboard, this process need not be repeated!

Thanks,

AJ