Struggling news-talk radio station MTR is on the brink of closure with part-owner Macquarie Radio Network today cutting funding, leaving the little-heard right-wing broadcaster without a benefactor.

MTR is jointly owned by Macquarie and Pacific Star Network. The move today by Macquarie to issue a notice of default - in effect withdrawing funding - also means that money owed to it by MTR is immediately due, under the terms of their capital loan agreement.

Unashamedly right-wing ... MTR's Steve Price and Sam Newman. Credit:Craig Abraham

The station has struggled to gain a toehold in Melbourne since it launched it's Sydney-style shock-jock format in 2010 with presenters including Steve Price, News Ltd columnist Andrew Bolt and former TV presenter Steve Vizard.