UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 12b-25

NOTIFICATION OF LATE FILING

                                                            SEC FILE NUMBER

                                                            0-11353

                                                            CUSIP NUMBER

                                                            172743 20 5

(Check one): [X]Form 10-K [ ]Form 20-F [ ]Form 11-K [X]Form 10-Q [ ]Form 10-D

             [  ]Form N-SAR [ ]Form N-CSR

             For Period Ended: December 31, 2006

             [  ]Transition Report on Form 10-K

             [  ]Transition Report on Form 20-F

             [  ]Transition Report on Form 11-K

             [  ] Transition Report on Form 10-Q

             [  ]Transition Report on Form N-SAR

             For the Transition Period Ended:__________________________________

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Read Instruction (on back page) Before Preparing Form. Please Print or Type.

NOTHING IN THIS FORM SHALL BE CONSTRUED TO IMPLY THAT THE COMMISSION HAS VERIFIED ANY INFORMATION CONTAINED HEREIN.

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If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:_________________________________

_______________________________________________________________________________

PART I - REGISTRANT INFORMATION

Circuit Research Labs, Inc.

_______________________________________________________________________________

Full Name of Registrant

_______________________________________________________________________________

Former Name if Applicable

7970 South Kyrene Rd.

_______________________________________________________________________________

Address of Principal Executive Office (Street and Number)

Tempe, Arizona 85284

_______________________________________________________________________________

City, State and Zip Code

PART II - RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense

and the registrant seeks relief pursuant to Rule 12b-25(b), the following should

be completed. (Check box if appropriate)

    | (a) The reason described in reasonable detail in Part III of this form

    |     could not be eliminated without unreasonable effort or expense

    | (b) The subject annual report, semi-annual report, transition report on

    |     Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion

[X] |     thereof, will be filed on or before the fifteenth calendar day

    |     following the prescribed due date; or the subject quarterly report or

    |     transition report on Form 10-Q or subject distribution report on

    |     Form 10-D, or portion thereof, will be filed on or before the fifth

    |     calendar day following the prescribed due date; and

    | (c) The accountant's statement or other exhibit required by Rule 12b-25(c)

    |     has been attached if applicable.

PART III - NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR,

N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

The Registrant is unable to file, without unreasonable effort and expense, its Form 10-KSB Annual Report for the period ended December 31, 2006 because the Registrant's auditors have not yet completed their review of the financial statements.

The Registrant is presently evaluating the carrying amount of goodwill at December 31, 2006 in connection with the conclusion of its annual goodwill impairment testing and requires additional time to completely assess and complete the goodwill impairment evaluation.

PART IV - OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this notification

            Robert W. McMartin               480          403-8300

    _________________________________    __________   __________________

                 (Name)                  (Area Code)  (Telephone Number)

(2) Have all other periodic reports required under Section 13 or 15(d) of the

    Securities Exchange Act of 1934 or Section 30 of the Investment Company Act

    of 1940 during the preceding 12 months or for such shorter period that the

    registrant was required to file such report(s) been filed ? If answer is no,

    identify report(s).                                      Yes [X]   No [ ]

__________________________________________________________________________

(3) Is it anticipated that any significant change in results of operations from

    the corresponding period for the last fiscal year will be reflected by the

    earnings statements to be included in the subject report or portion thereof?

                                                             Yes [X]   No [ ]

    If so, attach an explanation of the anticipated change, both narratively

    and quantitatively, and, if appropriate, state the reasons why a reasonable

    estimate of the results cannot be made.

________________________________________________________________________________

                           Circuit Research Labs, Inc.

                ________________________________________________

                  (Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned

hereunto duly authorized.

Date 04/03/2007                      By  /s/ Robert W. McMartin

                                          Robert W. McMartin

Executive Vice President and Chief

Financial Officer