EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in Registration Statement Nos. 333-64493, 333-124030, 333-124031 and 333-151024 on Form S-8 of CSP, Inc of our report dated December 23, 2013, relating to our audit of the consolidated financial statements, which is incorporated in this Annual Report on Form 10-K of CSP, Inc. for the year ended September 30, 2013.

Boston, Massachusetts

December 23, 2013