Ashdown 550 SPYDER - Manual (Page 11)

CABINET CONFIGURATIONS
LITTLE BASTARD
SINGLE 4 CABINET
WARNING
Ashdown BTA, 427 Small Block and Little Bastard bass amps feature
valve output stages. It is therefore important to connect the speaker
cabinet(s) correctly before switching the amplifier on. Switching the
amplifier on without the speaker cabinet(s) connected can cause
damage to the amplifier.
Damage caused by the failure to correctly connect speaker cabinets is
not covered under warranty.
SINGLE 8 CABINET
DUAL 8 CABINETS