Compact Programmable Bass Amplifier. Ashdown Engineering's extraordinary new Superfly combines a sophisticated programmable bass preamplifier and a powerful 2 x 250 Watts RMS power section in a compact bass amp head that weighs in at just 10 lbs. A product of the innovative Ashdown Labs development programme, the Superfly is gifted with a powerful, authoritative sound with a strong, controlled bottom end and clear, precise highs, all courtesy of an advanced digital power amp section.