I like having the on-baord speakers...all my Yamaha arrangers have had them...Roland ones too (except the modules .

I don't care if someone doesn't think the arranger isn't "pro"...I like the convenience of not having to switch on my monitors if I just want to play for a bit, or do some style editing.

My synths and band keyboards never had speakers, but somehow, to me, having them on an arranger seems more appropriate....sort of the all-in-one, go anywhere music laboratory/studio/fun machine.

I've made some serious money with an instrument that some pros don't take seriously.

Ian