My AT30 sounds great through headphones, but the two original 10" (25cm) integrated speakers sound pretty wimpy. Any suggestions? It doesn't appear that they are stereo but I could be wrong. The manual says the instrument's amplification is 40Wx2, and I assume I could replace them with a pair of decent full-range ones rated for at least 40W, but I'm a novice at this stuff and am hoping (expecting?) there's some expertise in this Forum that could provide some better guidance. Or, should I simply re-route the sound into a pair of good external tower speakers using the output jacks? Thanks in advance . . .