http://www.music123.com/item/?itemno=79273&affil=chrisb roland xv2020 synthesizer module list $695.00 our price $595.99 the xv-2020 64-voice expandable synthesizer module puts roland's flagship xv sounds in a convenient half-rack design complete with usb. expandable via two srx-series wave expansion boards, it's like a powerful plug-in synth with up to 192mb of sounds, three independent effects processors and intuitive editing software. http://www.music123.com/item/?itemno=79273&affil=chrisb