A 500-Watt bass amp head with an all-analog SansAmp™ pre-amp and Class D power amp.
Get more details here: http://tech21nyc.com/products/amps/bass/vt500.html
Here's the full rundown video of the VT Bass 500:
https://youtu.be/iDtTWGwWMj8
Check out the Rush-style sample settings video, too:
https://youtu.be/rDJLyCfSP1M