Chris Hodges scored a game-high 22 points and Michael Hodges added 18 as the Saxons thwarted a late rally by the visiting Broncos to prevail, 58-53.
With the game tied at 30 entering the second half, Schaumburg held Barrington to just 2-of-9 shooting from the field to take a 42-37 edge into the final frame.
Schaumburg's lead ballooned to 52-43 with just three minutes to go in the contest thanks to a 3-point play by Michael Hodges followed by a slam dunk by Heze Trotter that brought the house out of its feet.
The Broncos rallied to cut it to 56-53 with 12.6 seconds left in regulation, but missed a three pointer to tie as Schaumburg held on to improve to 7-1 in the MSL West and 17-5 overall.
"We as a team knew that we owed them one, so we came into practice this week focused that we weren't going to let that happen again," said Trotter.
Earlier in the season, Barrington had defeated Schaumburg on its home court 51-50 with just 1.9 seconds to play.
Mark Johnson paced the Broncos with 16 points and Will Raider added 15.
Alyssa Orozco led all scorers with 15 points and Talia Torosian chipped in 13 as the Lady Saxons used a 12-0 run to open the fourth quarter to get past the Fillies on Senior Night.
Schaumburg held Barrington to just 5-of-20 shooting in the first half, but clung to just a 20-19 edge at intermission as Fillies sharpshooter Anna Mae King scored 10 points in the second quarter. King would finish with 12 on the evening.
The Fillies got hot to start the third quarter, hitting its first 7-of-8 field goals to take a lead 36-30 headed into the final stanza, but Orozco and Torosian quickly erased that deficit.
Orozco drilled a three-pointer to open the quarter and then Torosian came up with a clutch steal and layup while fouled.
"That was a huge moment for her," said Saxons head coach Jacqueline Strauch. "She made some silly plays earlier in the game, but she knows what she can do out there. I always tell her it's the little things that make big plays and she did just that when we needed it."
Moments later, Torosian's putback down low off a missed shot gave Schaumburg a 38-36 advantage and the team never looked back.