<PAGE>

                                                                    Exhibit 4.21

                      RESTRICTED STOCK PURCHASE AGREEMENT
                                 (TENURE BONUS)

          This RESTRICTED STOCK PURCHASE AGREEMENT (this "Agreement") is dated
as of June 17, 2005, by and between CHIEF MANUFACTURING HOLDING CORP., a
Delaware corporation (the "Company"), and Jim Wohlford (the "Stockholder").

          WHEREAS, the Company wishes to sell and the Stockholder wishes to buy
certain shares of the Company's Class B Common Stock (as defined in Section 1
hereof) on the terms and subject to the restrictions contained in this
Agreement; and

          NOW, THEREFORE, in consideration of the mutual promises and agreements
set forth herein, the Company and the Stockholder agree as follows:

          1. DEFINITIONS. As used herein, the following terms shall have the
meanings specified below:

          "Act" has the meaning specified in Section 5 (a) hereof.

          "Actual Bonus Amount" means the amount (if any), determined on an
after-tax basis, of the "tenure bonus" paid by the Company to the Stockholder
with respect to the eighteen (18) month period ending on the Bonus Date. If a
Termination of Employment shall occur at any time prior to the Bonus Date and
for any reason, the Actual Bonus Amount shall be deemed to be zero for purposes
of this Agreement.

          "Affiliate" has the meaning specified in the Stockholder Agreement.

          "Agreement" has the meaning specified in the introductory paragraph
hereof.

          "Board" means the Board of Directors of the Company.

          "Bonus Date" means March 24, 2006.

          "Bonus Shortfall Event" means if (a) there shall occur a Termination
of Employment at any time prior to the Bonus Date and for any reason or (b) the
Actual Bonus Amount is less than the Purchase Price paid by the Stockholder.

          "Cause" means anything constituting "Cause" for termination under the
Employment Agreement.

          "Class A Common Stock" means the Company's Class A Voting Common
Stock, $0.001 par value per share.

          "Class B Common Stock" means the Company's Class B Non-Voting Common
Stock, $0.001 par value per share.

          "Class C Common Stock" means the Company's Class C Voting Common
Stock, $0.001 par value per share.

<PAGE>

          "Common Equity Value" means, as of any date, the fair market value (as
determined by an Independent Appraiser pursuant to Section 3.2 hereof) of the
entire common stock equity of the Company (without premium for control or
discounts for minority interests, restrictions on transfer or lack of voting
rights or other premiums or discounts that would be applicable if less than all
of the common stock equity is sold in a single transaction), calculated as of
such date, plus the aggregate consideration to be paid to the Company upon the
exercise of all then outstanding and exercisable warrants, options or
convertible securities pursuant to which the Company is then obligated to issue
shares of Common Stock (excluding any options or warrants for which the exercise
price per share exceeds the Market Value Per Share of a share of Common Stock as
of such date).

          "Common Stock" means the Class A Common Stock, the Class B Common
Stock and the Class C Common Stock, and any capital stock of the Company which
is (a) not preferred as to dividends or assets over any class of stock of the
Company, (b) not subject to redemption, and (c) issued to the holders of Common
Stock upon any reclassification thereof.

          "Company" has the meaning specified in the introductory paragraph
hereof.

          "Delayed Closing Date" has the meaning specified in Section 7.2
hereof.

          "Disability" has the meaning specified in the Employment Agreement.

          "Disposition Event" means (a) (i) the sale of all or substantially all
of the assets of the Company or its Subsidiaries in a single transaction or
series of related transactions whether by liquidation, dissolution, merger,
consolidation or sale or (ii) the sale or other transfer of at least 51% of the
outstanding shares of Common Stock in a single transaction or a series of
related transactions, in either case to any Person who is not an Affiliate of
the Company, or of a stockholder thereof, immediately prior to such transaction
or transactions, or (b) the effective time of any merger, share exchange,
consolidation, or other business combination of the Company if immediately after
such transaction Persons who hold a majority of the outstanding voting
securities entitled to vote generally in the election of directors of the
surviving entity (or the entity owning 100% of such surviving entity) are not
Persons who, immediately prior to such transaction, held the securities of the
Company entitled to vote generally in the election of directors.

          "Disposition Proceeds" means (i) in the case of a merger or any other
stock transaction, (A) the average price per share received by the holders of
Common Stock or by the Company or its Subsidiaries in connection with such
transaction, multiplied by (B) the sum of (x) the total number of shares of
Common Stock then outstanding, plus (y) the total number of shares of Common
Stock issuable upon exercise or conversion of any then outstanding and
exercisable warrants, options or convertible securities pursuant to which the
Company is then obligated to issue shares of Common Stock, or (ii) in the case
of any liquidation or sale of assets (including, without limitation, the sale by
the Company of the capital stock of its Subsidiaries), the Net Worth of the
Common Stock of the Company immediately prior to such liquidation or immediately
after such sale.


                                       -2-


<PAGE>

          "Employment Agreement" means the Employment and Non-Competition
Agreement, dated as of September 24, 2004, between Chief Manufacturing, Inc., a
Massachusetts corporation, and the Stockholder, as amended, restated,
supplemented or otherwise modified and in effect from time to time.

          "Good Reason" has the meaning specified in the Employment Agreement.

          "Independent Appraiser" means an independent investment banking firm,
accounting firm or appraiser of nationally recognized standing.

          "Market Value Per Share" means, with respect to any date, for any
share of Common Stock, (i) the Common Equity Value as of such date, divided by
(ii) the sum of (x) the total number of shares of Common Stock then outstanding,
plus (y) the total number of shares of Common Stock issuable upon exercise or
conversion of any outstanding and exercisable warrants, options or convertible
securities pursuant to which the Company is then obligated to issue shares of
Common Stock (excluding any options or warrants for which the exercise price per
share exceeds the Market Value Per Share of a share of Common Stock as of such
date).

          "Net Worth" means, in connection with any liquidation or sale of
assets by the Company, the consolidated net worth of the Common Stock of the
Company and its Subsidiaries, determined in accordance with generally accepted
accounting principles, taking into account (i) the total consideration received
by the Company for such transaction, (ii) the transaction costs incurred in
connection with such transaction and (iii) any liabilities of the Company and
its Subsidiaries whether or not to be discharged in connection with such
transaction (including, without limitation, payment of the liquidation value and
accrued dividends on any Preferred Stock of the Company).

          "Original Price Per Share" means $300.00 per Share for each share of
Class B Common Stock.

          "Person" an individual, partnership, limited liability company,
corporation, association, trust, joint venture, unincorporated organization, or
any government, governmental department or agency or political subdivision
thereof.

          "Plan" means the Company's 2003 Equity Incentive Plan attached hereto
as Exhibit A.

          "Preferred Stock" means any capital stock of the Company which is (a)
preferred as to dividends or assets over any other class of stock of the
Company, (b) subject to redemption or (c) issued to the holders of shares of
Preferred Stock upon any reclassification thereof.

          "Public Sale" means the Company's initial public offering of Common
Stock.

          "Purchase Price" has the meaning specified in Section 2(a) hereof.

          "Purchased Shares" has the meaning specified in Section 2(a) hereof.


                                       -3-


<PAGE>

          "Repurchase Notice" has the meaning specified in Section 3.2 hereof.

          "Shares" means (a) the Purchased Shares purchased by the Stockholder
pursuant to Section 2(a) of this Agreement and (b) all shares of the Company's
capital stock issued with respect to the Purchased Shares by way of dividend or
stock split or in connection with any merger, consolidation, recapitalization or
reorganization affecting the Company's capital stock.

          "Shortfall Shares" means, as of any time of determination, the number
of Shares equal to the quotient obtained by dividing (a) the excess of (i) the
Purchase Price paid by the Stockholder over (ii) the Actual Bonus Amount, by (b)
the Original Price Per Share.

          "Stockholder" has the meaning specified in the introductory paragraph
hereof.

          "Stockholder Agreement" means the Stockholder Agreement, dated as of
August 29, 2003, among the Company and its stockholders, as amended and in
effect from time to time.

          "Stockholder Appraiser Notice" has the meaning specified in Section
3.3 hereof.

          "Subsidiary" means, with respect to the Company, any corporation, a
majority (by number of votes) of the outstanding shares of any class or classes
of which shall at the time be owned by the Company or by a Subsidiary of the
Company, if the holders of the shares of such class or classes (a) are
ordinarily, in the absence of contingencies, entitled to vote for the election
of a majority of the directors (or persons performing similar functions) of the
issuer thereof, even though the right so to vote has been suspended by the
happening of such a contingency, or (b) are at the time entitled, as such
holders, to vote for the election of a majority of the directors (or persons
performing similar functions) of the issuer thereof, whether or not the right so
to vote exists by reason of the happening of a contingency.

          "Target Amount" means $110,000,000; provided, that if the Company
enters into any extraordinary transaction, such as a business acquisition or
disposition, the Board in the exercise of its business judgment may adjust
upward or downward the Target Amount to take into account such extraordinary
transaction.

          "Target Disposition Event" means a Disposition Event in which the
Disposition Proceeds equal or exceed the Target Amount.

          "Termination of Employment" means the termination of the Stockholder's
employment with the Company or any of its Subsidiaries for any reason,
including, without limitation, for resignation, death or Disability of the
Stockholder, and whether or not for Cause.

          "Transfer" has the meaning specified in Section 4 hereof.

          2. PURCHASE AND SALE OF SHARE. (a) Subject to (i) the terms and
conditions hereinafter set forth and in reliance on the representations and
warranties contained herein, and (ii) the Company's receipt of any and all
necessary consents, authorizations and approvals of the transactions
contemplated by this Agreement, the Company hereby agrees to


                                       -4-


<PAGE>

issue and sell to the Stockholder and the Stockholder hereby agrees to purchase
from the Company, on the date hereof 250 shares of Class B Common Stock (the
"Purchased Shares"). The aggregate purchase price paid by the Stockholder for
the Shares will be $75,000 (the "Purchase Price"). On the date hereof (A) the
full amount of the Purchase Price will be paid to the Company by wire transfer
of immediately available funds and (B) the Company shall deliver to the
Stockholder the certificate representing the Purchased Shares (such certificate
to bear the legends set forth in Section 6 hereof).

          (b) The Company represents and warrants that, after giving effect to
the purchase and sale effected hereby and all other agreements to purchase
capital stock of the Company on the date hereof, (i) the authorized capital of
the Company consists of (A) 300,000 shares of Class A Common Stock, no shares of
which are issued and outstanding on the date hereof, (B) 250,000 shares of Class
B Common Stock, 141,695.86 shares of which are issued and outstanding on the
date hereof, and (C) 100,000 shares of Class C Common Stock, 52,996.01 shares of
which are issued and outstanding on the date hereof, (ii) all such outstanding
capital stock (other than the Shares) is owned as set forth on Schedule 1 hereto
and is validly issued and outstanding, fully paid and non-assessable and (iii)
there are no commitments for the purchase or sale of, and no options, warrants
or other rights to subscribe for or purchase, any securities of the Company
other than as set forth on Schedule 1 hereto.

          3. REPURCHASE OF SHARES.

          3.1. REPURCHASE RIGHTS OF THE COMPANY.

          (a) Upon the Termination of Employment at any time on or after the
Bonus Date and for any reason, the Company shall have the right to repurchase
from the Stockholder, and the Stockholder will at the request of the Company
sell to the Company all (but not less than all) of the Shares at a purchase
price per Share equal to the Market Value Per Share.

          (b) Upon the occurrence of a Bonus Shortfall Event, the Company shall
have the right to repurchase from the Stockholder, and the Stockholder will at
the request of the Company, sell to the Company all (but not less than all) of
the Shortfall Shares at a purchase price per Share equal to the Original
Purchase Price Per Share plus interest on such amount from the date hereof to
the date of repurchase at the rate of 5% per annum.

          3.2. REPURCHASE CLOSING. The Company's repurchase rights under Section
3.1 shall be exercisable at any time within ninety (90) days following the
Termination of Employment or the Bonus Shortfall Event (as applicable) by notice
to the Stockholder (the "Repurchase Notice"). The closing of the repurchase of
such Shares shall be held (a) not earlier than five (5) days nor later than
thirty (30) days after delivery of the Repurchase Notice if such repurchase is
being made in connection with a Bonus Shortfall Event or (b) not earlier than
five (5) days nor later than thirty (30) days after determination of the Common
Equity Value if such repurchase is being made in connection with a Termination
of Employment (other than a Termination of Employment prior to the Bonus Date).
The Company's repurchase rights under Section 3.1 shall lapse if not exercised
within the time periods (if any) specified above in accordance with the
provisions hereof, except as otherwise provided in Section 7 hereof. Upon
delivery by the Company of the repurchase price for the Shares being repurchased
hereunder in


                                       -5-


<PAGE>

accordance with Section 8 hereof, all of the Shares being repurchased shall no
longer be deemed to be outstanding, all of the Stockholder's rights with respect
to such Shares shall terminate with the exception of the right of the
Stockholder to receive the repurchase price in exchange therefor pursuant to
this Section 3.2, and the Stockholder hereby appoints the Company as his
attorney-in-fact to take all actions necessary and sign all documents required
to cancel such Shares on its books and records.

          3.3. APPRAISAL. Within fifteen (15) days following his receipt of a
Repurchase Notice from the Company in respect of a repurchase of the Shares
pursuant to Section 3.1 (a) hereof, the Stockholder shall select three (3)
Independent Appraisers that the Stockholder proposes to determine the Common
Equity Value for purposes of this Agreement and shall notify the Company in
writing of such selection (the "Stockholder Appraiser Notice"). The Company
shall select one (1) of the Independent Appraisers listed in the Stockholder
Appraiser Notice and use reasonable commercial efforts to promptly engage, at
the cost and expense of the Company, such Independent Appraiser to determine the
Common Equity Value for purposes of this Agreement. The terms of such engagement
shall provide that the Independent Appraiser shall complete its determination of
the Common Equity Value within 45 days of engagement by the Company. The Company
shall not be required to select any Independent Appraiser from a Stockholder
Appraiser Notice unless the Stockholder Appraiser Notice includes three (3)
Independent Appraisers. If the Stockholder has not provided a Stockholder
Appraiser Notice which complies with the requirements of this Section 3.3 within
thirty (30) days following the Stockholder's receipt of the Repurchase Notice,
the Board shall in good faith select an Independent Appraiser to determine the
Common Equity Value. Any determination of the Common Equity Value by an
Independent Appraiser pursuant to this Section 3.3 shall be final, conclusive
and binding upon the parties.

          4. RESTRICTIONS ON TRANSFER. Except as otherwise expressly provided in
the Stockholder Agreement, the Stockholder may not sell, assign, transfer,
pledge or otherwise dispose of ("Transfer") any of the Shares, either
voluntarily or involuntarily or by operation of law, except to the Company or
any of its Subsidiaries. On and after the time the Company completes a Public
Sale, all of the restrictions on Transfer and the repurchase rights of the
Company contained herein (including, without limitation, the repurchase rights
of the Company pursuant to Section 3 hereof), shall cease to apply to any
Shares. On and after the completion of a Target Disposition Event, all of the
repurchase rights of the Company contained herein (including, without
limitation, the repurchase rights of the Company pursuant to Section 3 hereof),
shall cease to apply to any Shares. Upon any permitted Transfer of the Shares,
the transferee of the Shares shall execute and deliver to the Company an
agreement containing repurchase provisions substantially the same as those
contained herein.

          5. INVESTMENT REPRESENTATIONS. (a) The Stockholder represents that the
Shares are being acquired by him for his own account for investment and not with
a view to the distribution thereof. The Stockholder understands that the Shares
have not been registered under the Securities Act of 1933, as amended (the
"Act"), on the grounds that the offer and sale of the Shares to him are exempt
from the registration requirements of the Act under Section 4(2) thereof as a
transaction not involving any public offering of the Shares. The


                                       -6-
<PAGE>

Stockholder understands that the Company's reliance on such exemption is
predicated in part on the representations of the Stockholder which are contained
herein.

          (b) The Stockholder understands that he must bear the economic risk of
his investment in the Shares for an indefinite period of time because the Shares
have not been registered under the Act and, therefore, cannot be sold unless
they are subsequently registered under the Act or an exemption from such
registration is available. The Stockholder agrees that he will not offer to
Transfer any of the Shares except as expressly permitted by this Agreement and
then only after the Company has received an opinion of its counsel that such
offer or Transfer is not in violation of the registration requirements of the
Act or other applicable law.

          (c) The Stockholder represents that he is an "accredited investor" (as
defined in Rule 501 under the Act) and a resident of the State of Minnesota.

          6. LEGENDS; STOP TRANSFER. (a) Each certificate representing the
Shares shall bear legends in or substantially in the following form:

          "THE SHARES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
          UNDER THE SECURITIES ACT OF 1933, AS AMENDED. NO TRANSFER, SALE OR
          OTHER DISPOSITION OF THESE SHARES MAY BE MADE UNLESS A REGISTRATION
          STATEMENT WITH RESPECT TO THESE SHARES HAS BECOME EFFECTIVE UNDER SAID
          ACT, OR THE COMPANY HAS BEEN FURNISHED WITH AN OPINION OF COUNSEL
          SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

          THE SHARES EVIDENCED BY THIS CERTIFICATE ARE ALSO SUBJECT TO CERTAIN
          REPURCHASE RIGHTS IN FAVOR OF THE COMPANY AND CERTAIN PROVISIONS
          REGARDING RESTRICTIONS UPON TRANSFER CONTAINED IN A RESTRICTED STOCK
          PURCHASE AGREEMENT, DATED AS OF JUNE 17, 2005, COPIES OF WHICH WILL BE
          FURNISHED BY THE COMPANY TO THE HOLDER OF THE SHARES EVIDENCED BY THIS
          CERTIFICATE UPON WRITTEN REQUEST AND WITHOUT CHARGE."

          (b) In addition, the Company shall make a notation regarding the
restrictions on transfer of the Shares in the stock books of the Company, and
such Shares shall be transferred on the books of the Company only if and when
transferred or sold in compliance with all of the terms and conditions of this
Agreement.

          7. REPURCHASE RESTRICTIONS.

          7.1. CONTRACTUAL RESTRICTIONS ON REPURCHASE. Notwithstanding any
provision to the contrary in Section 3, if the Company is prohibited by the
terms of any of the financing agreements of the Company or its Subsidiaries with
their lenders from making any payments of any portion of the repurchase price
for the Shares in cash, the Company shall be


                                       -7-

<PAGE>

entitled to complete the repurchase of such Shares by delivering to the
Stockholder (or any transferee) a promissory note for that portion of the
repurchase price, payment of which is prohibited. Each such promissory note
shall (i) bear interest at the rate of five percent (5%) per annum, (ii) provide
for the payment of the principal evidenced thereby in such installments and at
such times as are permitted under the terms of the Company's and its
Subsidiaries' financing agreements with their lenders, (iii) be subordinated to
the indebtedness of the Company and its Subsidiaries to their lenders on terms
satisfactory to such lenders and (iv) subject to such payment restrictions and
subordination provisions, provide for the payment in full of the principal
evidenced thereby upon the sale of substantially all of the assets or stock of
the Company.

          7.2. IMPAIRMENT OF CAPITAL. If even after giving effect to the
provisions of Section 7.1 hereof, the Company is prohibited by the terms of any
of the financing agreements of the Company or any of its Subsidiaries with their
lenders from issuing a promissory note for the balance of the repurchase price
as contemplated by Section 7.1 or is prohibited by law from repurchasing any
Shares which it is obligated or has elected to repurchase hereunder due to any
existing or prospective impairment of its capital, the closing of such
repurchase shall be delayed until the first date on which the Company is
permitted by the terms of any such financing agreements to repurchase such
Shares and has sufficient capital to lawfully repurchase such Shares (the
"Delayed Closing Date"). In the event of any such delay, (i) the Company will be
obligated to pay, on the Delayed Closing Date, interest on the repurchase price
for such Shares, at the rate of five percent (3%) per annum from the date on
which the closing of the repurchase of such Shares was originally scheduled to
occur to the Delayed Closing Date, and (ii) the Stockholder shall remain bound
by the restrictions on Transfer contained herein during such delay; provided,
that the Company shall not be required to issue a promissory note to evidence
its payment obligation to the extent such issuance is prohibited by the terms of
any such financing agreements.

          8. PAYMENT FOR SHARES. At any closing held to consummate any
repurchase of the Shares hereunder, the Stockholder shall deliver to the Company
the stock certificates representing such Shares, duly endorsed in blank or with
duly executed stock powers attached, and the Company shall deliver to the
Stockholder a check in the amount of the repurchase price or a promissory note
as provided in Section 7.1.

          9. ADJUSTMENT OF REPURCHASE PRICE. Upon any stock split, reverse stock
split, recombination of shares or other similar reorganization of the capital
structure of the Company, the repurchase price otherwise payable to the
Stockholder upon the repurchase of any Shares pursuant to Section 3 hereof shall
be proportionally adjusted to reflect such reorganization.

          10. GENERAL.

          10.1. NOTICES. All notices, demands and other communications hereunder
shall be in writing or by written telecommunication, and shall be deemed to have
been duly given if delivered personally or if mailed by certified mail, return
receipt requested, postage prepaid, or if sent by overnight courier, or sent by
written telecommunication, as follows:


                                       -8-

<PAGE>

               If to the Company, to:

                    Chief Manufacturing Holding Corp.
                    c/o Friedman Fleischer & Lowe LLC
                    One Maritine Plaza
                    Suite 1000
                    San Francisco, California 94111
                    Fax No.: (415) 402-2111
                    Attention: Caleb Everett

               With copies sent simultaneously to:

                    Bingham McCutchen LLP
                    399 Park Avenue
                    New York, New York 10022
                    Fax No: (212) 752-5378
                    Attention: Neil W. Townsend, Esq.

               If to the Stockholder, to:

                    Jim Wohlford
                    4617 Casco Ave.
                    Edina, MN 55424

          Any such notice shall be effective (a) if delivered personally, when
received, (b) if sent by overnight courier, when receipted for, (c) if mailed,
three (3) days after being mailed as described above, and (d) if sent by written
telecommunication, when dispatched.

          10.2. EQUITABLE REMEDIES. Each of the parties hereto acknowledges and
agrees that upon any breach by the Stockholder of his obligations under Sections
3, 4, or 8 hereof, the Company will have no adequate remedy at law, and
accordingly will be entitled to specific performance and other appropriate
injunctive and equitable relief.

          10.3. SEVERABILITY. If any provision of this Agreement is or becomes
invalid, illegal or unenforceable in any respect under any law, the validity,
legality and enforceability of the remaining provisions hereof shall not in any
way be affected or impaired.

          10.4. WAIVERS. No delay or omission by either party hereto in
exercising any right, power or privilege hereunder shall impair such right,
power or privilege, nor shall any single or partial exercise of any such right,
power or privilege preclude any further exercise thereof or the exercise of any
other right, power or privilege.

          10.5. COUNTERPARTS. This Agreement may be executed in multiple
counterparts (including by facsimile), each of which shall be deemed an
original, but all of which together shall constitute one and the same
instrument.


                                       -9-

<PAGE>

          10.6. ASSIGNS. This Agreement shall not be assignable or transferable
by the Stockholder without the Company's prior written consent thereto.

          10.7. ENTIRE AGREEMENT. This Agreement contains the entire
understanding of the parties, supersedes all prior agreements and understandings
relating to the subject matter hereof and shall not be amended except by a
written instrument hereafter signed by each of the parties hereto. Nothing in
this Agreement shall be construed as a grant to the Stockholder of any right to
continuing employment with the Company or any Subsidiary or to restrict in any
way the right to terminate the Stockholder's employment at any time.

          10.8. GOVERNING LAW. This Agreement and the obligations of the parties
hereunder shall be deemed to be a contract under seal and shall for all purposes
be governed by and construed in accordance with the internal laws of The
Commonwealth of Massachusetts without reference to principles of conflicts of
law.

          11. SECTION 83(B) ELECTION. The Stockholder and the Company
acknowledge that the Stockholder will make an election, in accordance with
Section 83(b) of the Internal Revenue Code of 1986, as amended. The Stockholder
and the Company agree that the fair market value of the Shares is equal to the
aggregate Original Purchase Price Per Share of the Shares, and shall reflect
such fair market value to the extent required on any Federal, state or local
income tax return or filing. The Stockholder further agrees that he will file a
Section 83(b) election form with the Internal Revenue Service within thirty (30)
days after the date hereof.

          12. INCORPORATION OF PLAN TERMS. The sale of the Shares to the
Stockholder pursuant to this Agreement is subject to all of the applicable terms
of the Plan, including, but not limited to, Section 9 (Settlement of Awards).

      [Remainder of page intentionally left blank; signature page follows]


                                      -10-

<PAGE>

          IN WITNESS WHEREOF, and intending to be legally bound hereby, the
parties hereto have caused this Agreement to be duly executed as of the date and
year first above written.

THE COMPANY:                            CHIEF MANUFACTURING HOLDING CORP.


                                        By: /s/ SPENCER FLEISCHER
                                            ------------------------------------
                                        Name: SPENCER FLEISCHER
                                        Title: PRESIDENT


THE STOCKHOLDER:


                                        ----------------------------------------
                                        Jim Wohlford


                                      -11-

<PAGE>

          IN WITNESS WHEREOF, and intending to be legally bound hereby, the
parties hereto have caused this Agreement to be duly executed as of the date and
year first above written.

THE COMPANY:                            CHIEF MANUFACTURING HOLDING CORP.


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


THE STOCKHOLDER:


                                        /s/ Jim Wohlford
                                        ----------------------------------------
                                        Jim Wohlford


                                      -11-