The home team found themselves trailing 28-20 after some lax defence in the opening period but a strong start to the second quarter swung the momentum in their favour.
They went on an 11-0 run to move in front at 31-28 and it was a lead they would never relinquish. By half-time they had extended their advantage to eight points and early in the third, Kees Akerboom drilled home a triple to take the lead out to double digits.
Den Bosch had a successful night from the arc shooting over 52% while Proteas laboured to keep their opponents in check despite their impressive start to the contest.
The home team strolled to victory in the second half increasing their lead to as many as 25 during the third quarter before a better fourth quarter by Proteas added a touch of respectability to the score-line.
Peter Van Paassen produced a powerful performance of 16 points and 8 rebounds while David Jansen fired four triples for his 17 points.
Courtney Fells also harvested 17 points for the visitors while Vassil Evtimov pulled down 11 rebounds.