Rewrites throughout, adds share moves in paragraph 3 and analyst comment in paragraph 6

By Roshan Thomas

July 14 (Reuters) - Australian self-storage company Abacus Storage King ASK.AX said on Monday it had received a sweetened A$2.17 billion ($1.43 billion) takeover offer from a consortium of Ki Corp and Public Storage PSA.N, sending its shares more than 7% higher.

The new offer price of A$1.65 per share represents a premium of 11.9% to the stock's last close. The earlier offer of A$1.47 per share made in mid-May had valued the company at A$1.93 billion.

Shares of the Sydney-based company climbed as much as 7.1% to A$1.580, their highest level since June 23, while the broader benchmark index .AXJO was largely unchanged, as of 0130 GMT.

Abacus Storage's independent board committee said it would grant the consortium six weeks for due diligence to see if a binding deal could be agreed.

The consortium consists of South African billionaire Nathan Kirsh's family office, Ki Corp, and U.S.-listed Public Storage PSA.N.

"A further revised offer above net tangible assets per share may be necessary to convince minority shareholders to agree to the deal," analysts at Citi said in a note.

Net tangible assets represent the value of a company's physical assets minus liabilities.

"There is no certainty that the parties will be able to agree terms to implement the revised proposal," Abacus said in a statement.

($1 = 1.5223 Australian dollars)

(Reporting by Roshan Thomas in Bengaluru; Editing by Sandra Maler, Jamie Freed and Subhranshu Sahu)

((Roshan.Thomas@thomsonreuters.com;))