Document:

<PAGE>   1
                                                                  Exhibit 10.22

Rockford Corporation Debenture Ownership
As of December 31, 1998

<TABLE>
<CAPTION>
                                                                                                                    Number of Shares
                                     Debenture Holder                                           Amount               On Conversion
                                     -----------------------------------------------------------------------------------------------
<S>                                  <C>                                                    <C>                   <C>
8.5% Debentures:

                                       Carrio Cabling Corporation                               $500,000                     204,761

                                       Nicholas G. Bartol                                      $7,507.50                       3,074

                                       Timothy C. Bartol                                       $7,507.50                       3,074

                                       Ann Farr Bartol                                         $7,507.50                       3,074

                                       Pamela B. Carrio                                        $7,507.50                       3,074

                                       Mary Brigham Paul                                       $7,507.50                       3,074

                                       Rebecca Paul                                            $7,507.50                       3,074

                                       Timothy C. Bartol                                      $20,000.00                       8,190

                                       Nick G. Bartol                                         $39,000.00                      15,971

                                       Renee F. Bartol                                        $10,000.00                       4,095

                                       The J. Goldress Trust,                                 $20,000.00                       8,190
                                           Jerry  E. Goldress, Trustee

                                       Suttle Brothers Investments LLC                        $21,000.00                       8,600

                                       Suttle Brothers Investments LLC                        $31,500.00                      12,900
</TABLE>

<PAGE>   2

Rockford Corporation Debenture Ownership
As of December 31, 1998

<TABLE>
<CAPTION>
                                                                                                                    Number of Shares
                                       Debenture Holder                                           Amount               On Conversion
                                     -----------------------------------------------------------------------------------------------
<S>                                    <C>                                                    <C>                   <C>

                                       Lee Katz                                                $1,406.25                         575

                                       Richard J. Puricelli                                    $1,406.25                         575

                                       Carole O'Connor                                         $1,406.25                         575

                                       Richard D. Saunders                                     $1,406.25                         575

                                       Craig D. Crisman                                        $1,406.25                         575

                                       Marvin A. Davis                                         $1,406.25                         575

                                       Brian R. Stone                                          $1,406.25                         575

                                       Martin M. Batt                                          $1,406.25                         575

                                       Ronald N. Trout &                                       $4,922.00                       2,015
                                           Jonie Schuster Trout, Community Property

                                       The Principal Financial Group                          $10,000.00                       4,095
                                           IRA, Ronald N. Trout, Owner

                                       The Principal Financial Group                          $15,755.00                       6,452
                                           IRA, Alan R. Zimmerman, Owner

                                       Christopher D. Barnes                                   $2,817.00                       1,153

</TABLE>

<PAGE>   3

Rockford Corporation Debenture Ownership
As of December 31, 1998

<TABLE>
<CAPTION>
                                                                                                                    Number of Shares
                                       Debenture Holder                                           Amount               On Conversion
                                     -----------------------------------------------------------------------------------------------
<S>                                    <C>                                                    <C>                   <C>

                                       The Principal Financial Group                          $11,056.00                       4,527
                                           IRA, Angie Gitch, Owner

                                       The Principal Financial Group                           $5,000.00                       2,047
                                           IRA, H. Christopher Parvin, Owner

                                       Wayne Harris                                           $82,068.86                      33.609

                                       The Principal Financial Group                          $17,931.14                       7,343
                                           IRA, Wayne Harris, Owner

                                       Christine Trapp                                           $704.00                         288

</TABLE>

<PAGE>   4
Rockford Corporation Debenture Ownership
As of December 31, 1998

<TABLE>
<CAPTION>
                                                                                                                    Number of Shares
                                       Debenture Holder                                           Amount               On Conversion
                                      ----------------------------------------------------------------------------------------------
<S>                                    <C>                                                    <C>                   <C>

                                       Matthew Clonts                                          $1,760.00                         720

                                       The Principal Financial Group                           $5,000.00                       2,047
                                           IRA, Leslie K. Ferris, Owner

                                       Mark Albers                                             $1,760.00                         720

                                       The Principal Financial Group                           $3,520.00                       1,441
                                           IRA, Mark Albers, Owner

                                       The Principal Financial Group                          $50,000.00                      20,476
                                           IRA - James M. Thomson

                                       The Principal Financial Group                           $7,042.00                       2,883
                                           IRA, - David Boshes, Owner

                                       The Principal Financial Group                          $13,000.00                       5,323
                                           IRA  - David Boshes, Owner

                                       The Principal Financial Group                             $114.00                          47
                                           IRA, Victoria L. Hodson, Owner

                                       The Principal Financial Group                           $4,250.39                       1,740
                                           IRA, David Richards, Owner

                                       Var & Co.,                                             $23,606.00                       9,667
                                        First Trust National Association

                                       Graham Humes                                            $1,225.00                         501

                                       Gordon A. Jr. & Blair B. MacInnes                       $1,531.00                         626

                                       John P. Lloyd &                                         $5,000.00                       2,047
                                            Beverly A Lloyd, Joint Tenants
</TABLE>

<PAGE>   5

Rockford Corporation Debenture Ownership
As of December 31, 1998

<TABLE>

<CAPTION>
                                                                                                                    Number of Shares
Group                                  Debenture Holder                                           Amount               On Conversion
                                       ---------------------------------------------------------------------------------------------
<S>                                    <C>                                                    <C>                   <C>

                                       John P. Lloyd &                                        $10,000.00                       4,095
                                           John M. Lloyd, Joint Tenants
</TABLE><PAGE>   1
                                                                   EXHIBIT 10.39

LEASE SCHEDULE NO. 1000100950                                   FINANCING LEASE
                                                        (Per Diem Interim Rent)
Master Lease Agreement dated 10128198

Lessor:       Banc One Leasing Corporation

Lessee:       ROCKFORD CORPORATION

1. GENERAL. This Lease Schedule is signed and delivered under the Master Lease
Agreement identified above, as amended from time to time ("Master Lease"),
between Lessee and Lessor. Capitalized terms defined in the Master Lease will
have the same meanings when used in this Schedule.

2. FINANCING. Lessor finances for Lessee, and Lessee finances with Lessor, all
of the property ("Equipment') described in Schedule A-1 attached hereto (and
Lessee represents that all Equipment is new unless specifically identified as
used):

<TABLE>
<CAPTION>
<S>                               <C>                        <C>
3. AMOUNT FINANCED:               EQUIPMENT COST:            $662,022.50
                                  SET-UP/FILING FEE:         $    375.00
                                  MISCELLANEOUS:             $     00.00
                                  SALES TAX:                 $     00.00

                                  TOTAL:                     $ 662,397.5
</TABLE>

4. FINANCING TERM. The Base Term of this Schedule shall be 36 months and the
Base Term shall commence on the Acceptance Date (Commencement Date). The total
Lease Term consists of the Interim Term plus the Base Term. The Interim Term
begins on the date that Lessor accepts this Schedule as stated below Lessor's
signature (Acceptance Date) and continues up to the Commencement Date.

5. INSTALLMENT PAYMENTS/FEES. As financing for the Equipment, Lessee shall pay
to Lessor all amounts stated below on the due dates stated below. There shall be
added to each installment payment all applicable Taxes as in effect from time to
time.

(a) For the Interim Term, Lessee shall pay to Lessor on the Commencement Date an
amount equal to one-thirtieth (1/30th) of the Installment Payment multiplied by
the number of days in the Interim Term. Installment Payment means the total of
all installment payments due and payable during the Base Term divided by the
number of months in the Base Term.

(b) During the Base Term, Lessee shall pay to Lessor installment payments in the
amounts and according to the timing set forth below, provided however. that
notwithstanding the following, the final installment payment due hereunder shall
be equal to the remaining principal balance hereunder together with all accrued
interest and fees.
<PAGE>   2
         (1) Amount of each installment payment during the Base Term (including
principal and interest):

                            36 PAYMENTS OF $20,908.57

         (2)   Frequency of installment payments during the Base Term: MONTHLY

         (3)   Timing of installment payments during the Base Term: IN ARREARS

(c) Lessee shall pay Lessor a Set-Up/Filing Fee as follows:

         (1)   $0.00 shall be paid on the Acceptance Date, or
         (2)   $375.00 has been included in the above Amount Financed of the
               Equipment.

(d) Security Deposit: $ 0.00 , On the Acceptance Date, Lessee shall pay Lessor
said Security Deposit which shall be held in accordance with paragraph 6 below-

6. SECURITY INTEREST. This Schedule is intended to be a secured debt financing
transaction, not a true lease. See Paragraph 7 below regarding Lessee's
ownership of the Equipment. As collateral security for payment and performance
of all Secured Obligations (defined in Paragraph 8 below) and to induce Lessor
to extend credit from time to time to Lessee (under the Lease or otherwise),
Lessee hereby grants to Lessor a first priority security interest in all of
Lessee's right, title and interest in the Equipment, whether now existing or
hereafter acquired, any sums specified in this Schedule as a ASecurity Deposit~,
and in all Proceeds (defined in Paragraph 8 below). At its option, Lessor may
apply all or any part of any Security Deposit to cure any default of Lessee
under the Lease. If upon final termination of this Schedule, Lessee has
fulfilled all of the terms and conditions hereof, then Lessor shall pay to
Lessee upon Lessee's written request any remaining balance of the Security
Deposit for this Schedule, without interest,

7. TITLE TO EQUIPMENT; FIRST PRIORITY LIEN. Lessee represents, warrants and
agrees: that Lessee currently is the lawful owner of the Equipment; that good
and marketable title to the Equipment shall remain with Lessee at all times;
that Lessee has granted to Lessor a first priority security interest in the
Equipment and all Proceeds; and that the Equipment and all Proceeds are, and at
all times shall be, free and clear of any Liens other than Lessor's security
interest therein. Lessee at its sale expense will protect and defend Lessor's
first priority security interest in the Equipment against ail claims and demands
whatsoever.

8. CERTAIN DEFINITIONS. "Secured Obligations" means (a) all payments and other
obligations of Lessee under or in connection with this Schedule, and (b) all
payments and other obligations of Lessee (whether now existing or hereafter
incurred) under or in connection with the Master Lease and all present and
future Lease Schedules thereto, and (c) all other leases, indebtedness,
liabilities and/or obligations of any kind (whether now existing or hereafter
incurred, absolute or contingent, direct or indirect) of Lessee to Lessor or to
any affiliate of either Lessor or BANK ONE CORPORATION. "Proceeds" means all
cash and non-cash proceeds of

                                      -2-
<PAGE>   3
the Equipment including, without limitation, proceeds of insurance, indemnities
and/or warranties.

9. AMENDMENTS TO MASTER LEASE. For purposes of this Schedule only, Lessee and
Lessor agree to amend the Master Lease as follows: (a) public liability or
property insurance as described in the second sentence of Section 8 will not be
required; (b) the definition of "Stipulated Loss Value" in clause (b) of Section
9 is deleted and replaced by Paragraph 10 below; (c) the text of Section 10 is
deleted in its entirety; (d) Subsections 23(a) and 23(c) are deleted; (e)
subsection 23(b) and the last sentence of section 4 will apply only if an event
of default occurs; (f) Lessor and Lessee hereby agree that any and all
references to "Bank One Corporation" in the Lease, wherever located, are amended
to refer to "BANK ONE CORPORATION, and its successors and assigns" and (g) all
references in the Lease as it relates to this Schedule to "Lessee" and "Lessor"
shall be changed to "Borrower" and "Lender" respectively.

10. STIPULATED LOSS VALUE. FOR PURPOSES OF THIS SCHEDULE ONLY, the "Stipulated
Loss Value" of any item of Equipment during its Lease Term equals the aggregate
of the following as of the date specified by Lessor: (a) all accrued and unpaid
interest, late charges and other amounts due under this Schedule and the Master
Lease to the extent it relates to this Schedule as of such specified date, plus
(b) the remaining principal balance due and payable by Lessee under this
Schedule as of such specified date, plus (c) interest on the amount described in
the foregoing clauses (a) and (b) at the Overdue Rate commencing with the
specified date; provided, that the foregoing calculation shall not exceed the
maximum amount which may be collected by Lessor from Lessee under applicable law
in connection with enforcement of Lessor's rights under this Schedule and the
Master Lease to the extent it relates to this Schedule.

11. LESSEE TO PAY ALL TAXES. FOR PURPOSES OF THIS SCHEDULE AND ITS EQUIPMENT
ONLY: Lessee shall pay any and all Taxes relating to this Schedule and its
Equipment directly to the applicable taxing authority; Lessee shall prepare and
file all reports or returns concerning any such Taxes as may be required by
applicable law or regulation (provided, that Lessor shall not be identified as
the owner of the Equipment in such reports or returns); and Lessee shall, upon
Lessor's request, send Lessor evidence of payment of such Taxes and copies of
any such reports or returns.

12. LESSEE'S ASSURANCES. Lessee irrevocably and unconditionally: (a) reaffirms
all of the terms and conditions of the Master Lease and agrees that the Master
Lease remains in full force and effect; (b) agrees that the Equipment is and
will be used at all times solely for commercial purposes, and not for personal,
family or household purposes; and (c) incorporates all of the terms and
conditions of the Master Lease as if fully set forth in this Schedule.

13. REPRESENTATIONS AND WARRANTIES: Lessee represents and warrants that: (a)
Lessee is a corporation, partnership or proprietorship duly organized, validly
existing and in good standing under the laws of the state of its organization
and is qualified to do business and is in good standing under the laws of each
other state in which the Equipment is or will be located; (b) Lessee has full
power, authority and legal right to sign, deliver and perform the Master Lease,
this Schedule and all related documents and such actions have been duly
authorized by all

                                      -3-
<PAGE>   4
necessary corporate/partnership/ proprietorship action-, and (c) the Master
Lease, this Schedule and each related document has been duly signed and
delivered by Lessee, and each such document constitutes a legal, valid and
binding obligation of Lessee enforceable in accordance with its terms,

14. CONDITIONS. No lease of Equipment under this Schedule shall be binding on
Lessor, and Lessor shall have no obligation to purchase the Equipment covered
hereby, unless: (a) Lessor has received evidence of all required insurance; (b)
in Lessor's sole judgment, there has been no material adverse change in the
financial condition or business of Lessee or any guarantor; (c) Lessee has
signed and delivered to Lessor this Schedule, which must be satisfactory to
Lessor, and Lessor has signed and accepted this Schedule; (d) no change in the
Code or any regulation thereunder, which in Lessor's sole judgment would
adversely affect the economics to Lessor of the lease transaction, shall have
occurred or shall appear to be imminent; (e) Lessor has received, in form and
substance satisfactory to Lessor, such other documents and information as Lessor
shall reasonably request; and (f) Lessee has satisfied all other reasonable
conditions established by Lessor.

15. OTHER DOCUMENTS: EXPENSES: Lessee agrees to sign and deliver to Lessor any
additional documents deemed desirable by Lessor to effect the terms of the
Master Lease or this Schedule including, without limitation, Uniform Commercial
Code financing statements which Lessor is authorized to file with the
appropriate filing officers. Lessee hereby irrevocably appoints Lessor as
Lessee's attorney-in-fact with full power and authority in the place of Lessee
and in the name of Lessee to prepare, sign, amend, file or record any Uniform
Commercial Code financing statements or other documents deemed desirable by
Lessor to perfect, establish or give notice of Lessor's interests in the
Equipment or in any collateral as to which Lessee has granted Lessor a security
interest. Lessee shall pay upon Lessors written request any actual out-of-pocket
costs and expenses paid or incurred by Lessor in connection with the above terms
of this section or the funding and closing of this Schedule.

16. PURCHASE ORDERS AND ACCEPTANCE OF EQUIPMENT. Lessee agrees that (1) Lessor
has not selected, manufactured, sold or supplied any of the Equipment, (ii)
Lessee has selected all of the Equipment and its suppliers, and (iii) Lessee has
received a copy of, and approved, the purchase orders or purchase contracts for
the Equipment. AS BETWEEN LESSEE AND LESSOR, LESSEE AGREES THAT: (a) LESSEE HAS
RECEIVED, INSPECTED AND APPROVED ALL OF THE EQUIPMENT; (b) ALL EQUIPMENT IS IN
GOOD WORKING ORDER AND COMPLIES WITH ALL PURCHASE ORDERS OR CONTRACTS AND ALL
APPLICABLE SPECIFICATIONS; (c) LESSEE IRREVOCABLY ACCEPTS ALL EQUIPMENT FOR
PURPOSES OF THE LEASE "AS-IS, WHERE-IS" WITH ALL FAULTS; AND (d) LESSEE
UNCONDITIONALLY WAIVES ANY RIGHT THAT IT MAY HAVE TO REVOKE ITS ACCEPTANCE OF
THE EQUIPMENT.

                                      -4-
<PAGE>   5
LESSEE HAS READ AND UNDERSTOOD ALL OF THE TERMS OF THIS SCHEDULE. LESSEE AGREES
THAT THERE ARE NO ORAL OR UNWRITTEN AGREEMENTS WITH LESSOR REGARDING THE
EQUIPMENT OR THIS SCHEDULE.

BANC ONE LEASING CORPORATION              ROCKFORD CORPORATION
(Lessor)                                  (Lessee)

By:               /s/                     By:                             /s/
   _______________________________           __________________________________

Title:            /s/                     Title:                          /s/
   _______________________________           __________________________________

Acceptance Date:  /s/                     Acceptance Date:                /s/
   _______________________________           __________________________________

                                      -5-
<PAGE>   6
                          BANC ONE LEASING CORPORATION

                     SCHEDULE A-1 EQUIPMENT LEASED HEREUNDER

QUANTITY                          DESCRIPTION                   PAGE         1

"ALL PROPERTY DESCRIBED IN THE INVOICES IDENTIFIED BELOW, WHICH PROPERTY MAY BE
GENERALLY DESCRIBED AS MANUFACTURING AND ASSEMBLING, AND A FORK LIFT."

<TABLE>
<CAPTION>
<S>                                                 <C>
              EQUIPMENT LOCATION:                   546 S. ROCKFORD DR
                                                    TEMPE, AZ 85281
              COUNTY:                               MARICOPA
              COST:                                 $662,022.50
</TABLE>

<TABLE>
<CAPTION>
         VENDOR                                     INVOICE
         ------                                     -------
<S>                                                 <C>
         CROWN SIMPLIMATIC                          129467
         SEHO USA                                   105032
         YALE MATERIALS                             20063601
         ROYONIX                                    3450
         SEHO USA                                   105511
         SEHO USA                                   105268
         SEHO USA                                   105399
         SEHO USA                                   105312
         INTERNATIONAL HI-TECH                      9922
         INTERNATIONAL HI-TECH                      9929
         INTERNATIONAL HI-TECH                      9928
         EXPEDITORS                                 7110008809
</TABLE>

TOGETHER WITH ALL ATTACHMENTS, ADDITIONS, ACCESSIONS, PARTS, REPAIRS,
IMPROVEMENTS, REPLACEMENTS AND SUBSTITUTIONS THERETO.

This Schedule A-1 is attached to and made a part of Lease Number 100100950 and
constitutes a true and accurate description of the equipment.

Lessee:
       ______________________

By:
   __________________________

Date:
     ________________________

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