Ashdown Tour Bus 15 Bass Combo Amplifier (Discontinued) Leave a Comment / Amps for Practice & Recording, Music Production / By Denise / July 19, 2017 86 GEARANK 86 out of 100. Incorporating 10+ ratings and reviews. Street Price: $100.00 Manufacturer: Ashdown Features 15-watt power amp 8” speaker Straightforward volume and 2-band bass & treble EQ controls Headphone socket CD/MP3 input Premium heavy-duty buffalo Tolex