<PAGE>

Exhibit 3.1(a)

                      RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                           TELEX COMMUNICATIONS, INC.

1.    The name of this corporation (hereinafter referred to as the
      "Corporation") is:

                           TELEX COMMUNICATIONS, INC.

2.    The period of duration of the Corporation shall be perpetual.

3.    The address of the Corporation's registered office in the State of
      Delaware is Corporation Service Company, 2711 Centerville Road, Suite 400,
      New Castle County, Delaware 19808 and the name of its registered agent at
      said address is the Corporation Service Company.

4.    The purpose of the Corporation is to engage in any lawful act or activity
      for which corporations may be organized under the General Corporation Law
      of Delaware.

5.    The Corporation shall have authority to issue 1000 shares of Common Stock,
      par value of $0.01 per share (the "Common Stock").

6.    The shares of Common Stock shall entitle the holders thereof to one vote
      per share on all matters upon which such stockholders have the right to
      vote.

7.    The Board of Directors is hereby empowered to authorize by resolution or
      resolutions from time to time the issuance of one or more classes or
      series of Preferred Stock and to fix the designations, powers, preferences
      and relative participating, optional, or other rights, if any, and the
      qualifications, limitations or restrictions thereof, if any, with respect
      to each such class or series of Preferred Stock and the number of shares
      constituting each such class or series, and to increase or decrease the
      number of shares of any such class or series to the extent permitted by
      the General Corporation Law of Delaware.

8.    All of the powers of the Corporation, insofar as the same may be lawfully
      vested by this Certificate of Incorporation in the Board of Directors, are
      hereby conferred upon the Board of Directors of the Corporation. Elections
      of the Directors need not be by ballot unless the Bylaws of this
      Corporation shall so provide.

9.    The stockholders and Board of Directors shall have power, if the Bylaws so
      provide, to hold their meetings and to keep the books, documents and
      papers of the Corporation without the State of Delaware except such as are
      required by the law of the State of Delaware to be kept in the State of
      Delaware.

10.   In furtherance and not in limitation of the powers conferred by statute,
      the Board of Directors is expressly authorized to make, alter or repeal
      the Bylaws of the Corporation.
<PAGE>
11.   The Corporation shall indemnify its officers, directors, employees and
      agents to the full extent permitted by the General Corporation Law of
      Delaware.

12.   No member of the Board of Directors of the Corporation shall have any
      personal liability to the Corporation or its stockholders for monetary
      damages for breach of fiduciary duty as a director, provided that the
      foregoing shall not eliminate or limit the liability of a director (i) for
      any breach of the director's duty of loyalty to the Corporation or its
      stockholders, (ii) for acts or omissions not in good faith or which
      involve intentional misconduct or a knowing violation of law, (iii) under
      Section 174 of Title 8, Delaware Code, or (iv) for any transaction from
      which the director derived an improper personal benefit.

13.   The Corporation reserves the right to amend and repeal any provision
      contained in this Certificate of Incorporation in the manner prescribed by
      the law of the State of Delaware.

      IN WITNESS WHEREOF, this Restated Certificate of Incorporation has been
signed under seal of the corporation this 20th day of November 2001.

Attest:                               Telex Communications, Inc.


/s/ Kristine L. Bruer                 By:  /s/ Richard J. Pearson
------------------------------------  ------------------------------------------
Kristine L. Bruer                     Richard J. Pearson
Assistant Secretary                   Vice President and Chief Financial Officer


                                       2