This just came with the new HD firmware.
This profile is great for a dark jazz tone with neck pickup.
Great for bass as well... A studio standard for many years.
Profiled with all controls at 50%.
Adjust to taste.
Bill
“Flip Top” HD Bass Amp Model. Introducing the world’s very first HD bass amp model based on* the immortal Ampeg® B-15NF Portaflex®, one of the most popular studio bass amps of all time. The modeled cab features the original 15-inch speaker perfect for laying down some serious thump.
I used to own an old tube B-15 PortaFlex - it was *the Bomb* for fat, singing blues guitar - all I did was add a bright cap across the volume pot. I just sold it last year. 
