The bass amplifier is considered to be slightly more complex in its nature than traditional amplifiers due to the challenges of designing and making an amplifier to accentuate and enhance low frequencies.
The challenge also affects the bass speaker, the speaker cabinet, the amplifier itself and the pre-amplifier largely due to the massive amount of air that needs to be moved to reproduce low frequencies. Bass speakers are normally re-enforced or certainly made to be more heavy-duty and generally therefore have larger magnets. The sound pressure levels need to be higher for a bass guitar to reach the same level of perceived volume as other instruments.
