I agree with John DiLeo. The Tyros' own speaker system w/sub certainly lacks oomph! and other speakers in the same category i.e. "small satellites w/sub" just can't muster the sound that a keyboard such as the Tyros deserves to be heard with. These little Logitech, etcetera, type of speakers are simply not powerful enough [read: NOT PRO quality grade] and you really need something on a PRO quality level to really make that $3,000 instrument shine as it was meant to. I have a Tyros 1 also and if I'm gonna spend 3 G notes on a keyboard I'm not going to skimp on speakers if I don't have to. OTOH, if the Tyros broke your bank then cheesy speakers may be your only recourse, but if it were me I would save up and eventually get some pro level speakers for your Tyros and in the mean time listen to it through the Sennheiser HD 280 'PRO' headphones.

Best,
Mike