Exhibit 24

                               POWER OF ATTORNEY

      Know all by these presents, that the undersigned hereby constitutes and
appoints each of the chief legal officer, general counsel, chief compliance
officer and chief financial officer of AAC Holdings, Inc. (the "Company") as the
undersigned's true and lawful attorney-in-fact to:

  (1) prepare, execute in the undersigned's name and on the undersigned's
      behalf, and submit to the U.S. Securities and Exchange Commission (the
      "SEC") a Form ID, including amendments thereto, and any other documents
      necessary or appropriate to obtain codes and passwords enabling the
      undersigned to make electronic filings with the SEC of reports required by
      Section 16(a) of the Securities Exchange Act of 1934 or any rule or
      regulation of the SEC;

  (2) execute for and on behalf of the undersigned, in the undersigned's
      capacity as an officer of the Company, Forms 3, 4 and 5 in accordance with
      Section 16(a) of the Securities Exchange Act of 1934 and the rules
      thereunder, and any other forms or reports the undersigned may be required
      to file in connection with the undersigned's ownership, acquisition, or
      disposition of securities of the Company;

  (3) do and perform any and all acts for and on behalf of the undersigned which
      may be necessary or desirable to complete and execute any such Form 3, 4,
      or 5, or other form or report, complete and execute any amendment or
      amendments thereto, and timely file such form or report with the United
      States Securities and Exchange Commission and any stock exchange or
      similar authority; and

  (4) take any other action of any type whatsoever in connection with the
      foregoing which, in the opinion of such attorney-in-fact, may be of
      benefit to, in the best interest of, or legally required by, the
      undersigned, it being understood that the documents executed by such
      attorney-in-fact on behalf of the undersigned pursuant to this Power of
      Attorney shall be in such form and shall contain such terms and conditions
      as such attorney-in-fact may approve in such attorney-in-fact's
      discretion.

      The undersigned hereby grants to the attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorney-in-fact, in
serving in such capacity at the request of the undersigned, is not assuming, nor
is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.

      This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 31st day of October, 2019.

                              By: /s/ Jerry D. Bostelman
                                  -----------------------
                              Name: Jerry D. Bostelman
                              Title: Director