since you just got it hopefully you got it new . on their site they say that power supply will...
Power Supply
Non-regulated, 110V
Can run up to MF-600.
Power supplies float around 18vdc and drop to around 14vdc with a load.
Power Supplies by World Wide Amplifiers
the MF-600 is a 6x2879 amp . it should have no problem with the 1x4 you have . id contact them to tell them you have a defective device . let us know how they treat you .
Contact Us
a member here named Psycho is involved with that company . maybe he can help .
BTW . 100 amps is enough to drive a cb amp to 1000 watts typically . way way way more than four 2879 finals can cleanly produce