Document:

EXHIBIT 10.40

                        Addendum to the Vendor Agreement
                                     Between
              Best Buy Purchasing, LLC and SLS International, Inc.

Effective Date:   December 1, 2005
                -------------------------------------

THIS ADDENDUM TO THE VENDOR AGREEMENT (the "Addendum") is made and entered into
by and between Best Buy Purchasing LLC, a Minnesota corporation ("Best Buy"),
having its principal office at 7601 Penn Avenue South, Richfield, Minnesota,
55423, U.S.A., and SLS International, Inc., a corporation organized under
Delaware law ("Vendor"), having its principal office at 1650 W. Jackson, Ozark,
MO 65721.

WHEREAS, the parties entered into that Vendor Agreement dated December 1, 2005
(the "Vendor Agreement") pursuant to which Best Buy will purchase goods from
Vendor, and distribute, market and resell those goods;

WHEREAS, the parties entered into that certain Consignment Agreement dated
February 22, 2006 (the "Consignment Agreement") pursuant to which Best Buy will
distribute, market and resell Vendor's goods on a consignment basis;

WHEREAS, the parties desire to amend the Vendor Agreement as set forth below;

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants set
forth below, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereby agree as
follows:

1. The Vendor Agreement, the Consignment Agreement, and the respective terms,
provisions and definitions thereof shall continue in full force and effect and
are hereby incorporated herein in their entirety by this reference hereto.
Unless otherwise defined herein, each capitalized term used herein that is
defined in the Vendor Agreement and/or the Consignment Agreement shall have the
meaning specified for such term in the such Agreement. Any references to
sections in this Amendment correspond to sections in the Vendor Agreement only.
Provided however, that the sales calculation processes as outlined in the
Consignment Agreement shall be used to calculate units sold. Only after Best Buy
has recorded net sales of the initial three thousand ninety units, will Best Buy
begin remitting payment for remaining units under the Consignment Agreement.

2. The parties agree that the Initial Shipment of Vendor's Products to Best Buy
shall be subject solely to the terms and conditions of the Vendor Agreement, and
that the terms and conditions of the Consignment Agreement shall not apply to
the Initial Shipment.

3. For purposes of this Addendum, "Initial Shipment" shall mean 3,090 units of
Vendor's Products set forth in a purchase order issued Best Buy on or before
March 1, 2006.

4. Best Buy shall pay Vendor's invoice for the Initial Shipment within 30 days
after delivery of the Initial Shipment.

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5. This Addendum supplements and modifies the Vendor Agreement and the
Consignment Agreement. Except as expressly modified herein, the Vendor Agreement
and the Consignment Agreement remain in full force and effect in accordance with
their respective terms and conditions. If there is any conflict between the
terms of this Addendum and the Vendor Agreement or the Consignment Agreement,
the terms of this Addendum shall control.

         IN WITNESS WHEREOF, the parties hereto have executed this Addendum as
of the day first written above.

BEST BUY PURCHASING LLC                         SLS INTERNATIONAL, INC.

By:                                             By:
    ---------------------------                     ---------------------

Title: VP- Vendor Management                    Title: President

                                       2EXHIBIT 10.41

                                    ADDENDUM
                              CONSIGNMENT AGREEMENT

                               [BEST BUY VENDORS]

EFFECTIVE DATE:   FEBRUARY 21, 2006

THIS CONSIGNMENT AGREEMENT ("Agreement") is made a part of and is hereby
incorporated into the Vendor Agreement between Best Buy Purchasing LLC (a Best
Buy Co., Inc. subsidiary) and its affiliates, having its principal place of
business at 7601 Penn Avenue South, Richfield, Minnesota, USA 55423-3645
("Consignee") and SLS International Inc. having its principal place of business
at 1650 W. Jackson, Ozark, MO 65721 ("Consignor"), which became effective on
December 1, 2005. This Agreement is intended to set forth the terms and
conditions applicable only to the provision of consigned products from Consignor
to Consignee and intended for resale via Consignee's Best Buy stores and/or
Internet web sites. Such consigned products are described on EXHIBIT A hereto,
as may be amended from time to time by agreement by the parties ("Consignment
Product(s)").

All terms in the Vendor Agreement shall remain in full force and effect with
respect to non-consigned products. With respect to Consignment Products, the
following terms shall supplement the terms of the Vendor Agreement. In the event
of conflict, the terms of this Agreement will control with respect to
Consignment Product.

1. RESERVATION OF RIGHTS AND TITLE. Title to the Consignment Products is
reserved in Consignor until sale of the Consignment Product by Consignee to
Consignee's customers. Consignee agrees to cooperate with Consignor in effecting
the protections afforded consignment sellers under Sections 9-103(d), 9-109
(a)(4) and 9-319 of the Uniform Commercial Code as adopted and in effect in the
state of Minnesota, to the extent provided herein. Consignee agrees to execute
UCC-1 financing statements as modified in the form attached as EXHIBIT B,
provided that Consignor shall be responsible for preparation of such financing
statements and for the filing of such financing statements and payment of all
applicable filing and preparation costs. No security interest shall be granted
in the proceeds from the sale of the Consignment Product.

2. SALE OF CONSIGNMENT PRODUCT. Consignee has sole discretion to determine the
retail price of the Consignment Product and the right to determine the amount
and frequency of any retail price changes. For each sale of a unit of
Consignment Product, regardless of the retail sale price, Consignee shall pay
Consignor the "Agreed Cost" for such Consignment Product, as set forth in
EXHIBIT A, minus the allowances, deductions and vendor charge-backs agreed
between the parties. Consignment Product sold and returned by a customer in
accordance with Consignee's return policy shall not be considered a "sale" for
purposes of calculating payments to Consignor. Consignment Product that is
defective (which includes but is not limited to Consignment Product that is
returned without the box, with an opened box, or with a damaged box) shall be
the responsibility of Consignor, and may be returned to Consignor unless
otherwise mutually agreed. Any amounts remaining from the sale after payment to
Consignor as set forth herein shall be retained by Consignee. Consignee shall
exert commercially reasonable efforts to sell the Consignment Product consistent
with Consignee's sales, marketing and merchandising plans, which may be amended
from time to time.

3. INVOICES; PAYMENT; ALLOWANCES. All transactions (e.g., purchase orders and
invoices) shall be conducted via Electronic Data Interchange (EDI). Consignment
Product shall not be payable until sell-through to Consignee's customers.
However, upon shipment of the Consignment Product to Consignee, Consignor shall
submit a corresponding invoice to Consignee that contains quantity, Agreed Cost,
and stock-keeping unit (SKU) information. Further, Consignor's invoices shall
contain net 30 payment terms as a placeholder; however, actual payment terms
shall be as provided herein. Such invoice detail is necessary so that
Consignee's merchandise receipt system can automatically match each invoice to
the corresponding Consignment Product delivery and purchase order issued by
Consignee. Any discrepancies (e.g., shortages) identified by Consignee will be
reconciled with Consignor each month to assure that the parties agree to the
correct inventory of Consignment Product held by Consignee. The parties will at
this time make any necessary corrections to their records concerning invoices
and quantities.

If Consignor fails to submit EDI invoices in the manner specified above to
Consignee to confirm the quantities of Consignment Products shipped, Consignee
may in its discretion: (1) make payment to Consignor based upon quantities of
Consignment Products as determined by Consignee's inventory records, which will
result in a delay in Consignee's payment to Consignor; or (2) delay its payment
to Consignor until Consignor produces the necessary EDI invoices or other
documentation to confirm quantities of Consignment Products shipped.

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Consignee shall provide net point of sales data to Consignor via EDI on a weekly
basis (i.e., net of customer returns) at no charge. Subject to the Consignor's
obligation to provide accurate EDI invoices to Consignee on a timely basis,
Consignee shall make a monthly payment to Consignor via US Mail fifteen (15)
days following Consignee's fiscal month end. Payment will be based on final
estimated monthly sales, which may not equal the sum of weekly sales
transmissions to Consignor due to sales system corrections posted within two
business days after fiscal month end.

Agreed allowances/deductions may be set forth below or described in a separate
writing between the parties:

ADVERTISING ALLOWANCE:

DEFECTIVE ALLOWANCE:

PLACEMENT/END CAP ALLOWANCE:

SHRINK ALLOWANCE:

[OTHER]:

4. AUDITS. Consignor may audit Consignee's books and records pertaining solely
to the subject matter of this Agreement no more than once per year, provided
that Consignee shall be given reasonable written notice, and further provided
that the audit shall take place at Consignee's facilities during normal business
hours. Costs of the audit shall be borne by Consignor, provided that if a five
percent (5%) or more discrepancy or shortfall is found, Consignee will reimburse
the reasonable and documented costs of such audit.

5. TAXES. Consignee will be responsible for the collection and remittance of the
appropriate sales tax to the proper taxing authorities and will provide state
resale tax certificates to Consignor. Consignee shall report the consignment
inventory, as listed on Consignee's general ledger, to the Consignor. Consignor
will be responsible to pay any personal property taxes relating to the
Consignment Product in Consignee's possession. Each party shall be responsible
for reporting its own income derived from this Agreement and for payment of its
own income taxes.

6. SHIPMENTS. Consignor will ship the Consignment Product to Consignee's
designated shipping address (e.g., distribution centers and/or stores) at
Consignor's risk and expense. Consignor shall be responsible for making shipping
arrangements, scheduling, tracking, proof of delivery, tracing, and obtaining
insurance for loss or damage while Consignment Products are in transit, and
filing freight claims for loss and/or damage. If expedited shipment becomes
necessary, in the reasonable opinion of both parties, due to the fault or delay
of Consignor, then Consignor shall pay the costs of such expedited shipments to
either Consignee's distribution centers or via drop ships to Consignee's stores,
as requested by Consignee. If expedited shipment becomes necessary, in the
reasonable opinion of both parties, due to the fault or delay of Consignee, then
Consignor agrees to ship product, freight collect, to either Consignee's
distribution centers, or stores via drop ship, as requested by Consignee;
Consignee shall then charge back Consignor the difference between the standard
ground shipping costs and the expedited shipping costs. The carrier (not
Consignor) shall invoice Consignee in this latter freight collect situation.
Consignor agrees not to include freight charges on any invoices under any
circumstances.

7. RETURN OF GOODS. Consignee has 100% return rights with respect to the
Consignment Product, whether in cases of defectives, obsoletes, slow-moving
Consignment Products, upon termination, or otherwise. Except as otherwise
expressly set forth in this Agreement, Consignee agrees to arrange and pay for
return shipments. Notwithstanding the foregoing, the undersigned Consignee
reserves the right to return, at Consignor's expense, any Consignment Products

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2-11-03 Best Buy version                                                  Page 2

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for which a claim is made that alleges that the Consignment Products (1)
infringe any alleged patent, design, tradename, trademark, copyright, right of
privacy, or any other tangible or intangible property rights, or (2) are not
manufactured, packaged and labeled in accordance with best industry standards
and/or all applicable laws, ordinances, rules and regulations by governmental
departments, bodies and agencies governing and/or restricting the receipt and
sale of Consignment Products by the undersigned Consignee, or (3) have caused
injury to person or property. In addition, Consignor agrees to pay the cost of
return shipments of substantially defective product. In all cases, Consignor
agrees to provide a return authorization ("RA") within 48 hours of request.

8. FURTHER OBLIGATIONS OF CONSIGNEE. Consignee shall make an annual payment to
Consignor at the most recent Agreed Cost per unit for any loss or damage to the
Consignment Products, less any applicable discounts, allowances or other valid
off set amounts, while such Consignment Products are in the care, custody, and
control of Consignee. Notwithstanding the foregoing, Consignee agrees to use
commercially reasonable efforts to protect and preserve the Consignment Products
that are in the care, custody or control of Consignee, wherever located.
Consignee further agrees to maintain all-risk property insurance in an amount
adequate to fully insure all Consignment Products in the care, custody or
control of Consignee, wherever located, in an amount not less than $5 Million,
and will name Consignor as a loss payee on such policy where Consignor's
interest appears.

9. FURTHER OBLIGATIONS OF CONSIGNOR.

         a. Consignor represents and warrants that (i) Consignor has full title
to the Consignment Product, free and clear of all liens, charges and other
encumbrances, and (ii) all Consignment Products delivered hereunder will have
been manufactured, packaged, and labeled in accordance with best industry
standards and all applicable laws, ordinances, rules, and regulations by
governmental departments, bodies, and agencies governing and/or restricting the
purchase, acceptance, resale, distribution or promotion of such Consignment
Product by Consignee.

         b. Consignor will indemnify, defend, and hold Consignee, its parent,
affiliates, agents and employees, harmless from and against any and all claims,
actions, liabilities, losses, costs and expenses arising from or in connection
with (a) Consignor's breach of this Agreement, including but not limited to its
representations and warranties; (b) acts or omissions of Consignor relating to
the Consignment Products which includes, but is not limited to claims that the
Consignment Products, or use thereof, caused personal injury, death, or real or
personal property damage; (c) a Consignment Product recall, whether or not
initiated by Consignor; (d) claims that the Consignment Products infringe,
misappropriate or injure a third party's intellectual property or proprietary
rights; (e) false or misleading Consignment Product specifications provided to
Consignee to promote and sell the Consignment Products; and (f) Consignor's
failure to promptly perform its obligations in connection with a rebate offer.
Consignee agrees to give Consignor prompt written notice of any claims, to
tender the defense to Consignor, and to grant Consignor the right to control
settlement and resolution. Consignor agrees to pay all costs of liability,
settlement and defense, including attorney fees and costs.

10. CONSIGNOR-CONSIGNEE RELATIONSHIP. The parties do not intend to form a
partnership or joint venture, principal-agent, employer-employee, or any other
relationship other than that of consignor-consignee, and, where appropriate,
licensor-licensee. It is fully understood that each party will exercise full
power and authority, except for as specifically provided otherwise in writing
and signed by both parties, to select the means, method and manner of performing
all obligations required under this Agreement. Except as provided herein,
neither party will have any right or authority and will not attempt to enter
into any contract or commitment, or incur any debt or liability of any nature in
the name of or on behalf of the other party.

11. TERM; TERMINATION. The term of this Agreement shall commence on the
Effective Date, and shall continue for one year, but shall automatically renew
on an annual basis unless terminated by either party upon advance written notice
to the other. Termination shall not affect the parties' respective outstanding
obligations.

Upon termination, the parties will wind up their consignment relationship by
conducting an account reconciliation to reach a final settlement. In the event
Consignee's records reflect a debit balance with Consignor (defined as any
amount owed by Consignor to Consignee), Consignee may (i) hold the Consignment
Products as collateral until Consignor makes payment to Consignee; or (ii) if
Consignee elects to purchase the remaining inventory of Consignment Product,
deduct the debit balance amount from the amount payable to Consignor.
Notwithstanding the foregoing, upon termination of this Agreement, Consignee
may, at its option, (i) purchase the remaining Consignment Product in its
possession (and negotiate in good faith for obtaining price protection), or (ii)
return all or some of the Consignment Product to Consignor at Consignee's
expense.

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2-11-03 Best Buy version                                                  Page 3

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Upon commencement of this Agreement, if the parties agree to convert existing
non-consignment inventory in Consignee's possession into Consignment Product
inventory, the parties shall make this conversion effective on the first day of
Consignee's fiscal month. Similarly, upon termination or expiration of this
Agreement, if the parties agree to convert existing consignment inventory into
non-consignment inventory, the parties shall make this conversion effective on
the first day of Consignee's fiscal month.

12. ASSIGNMENT. Neither party may assign this Agreement without first obtaining
the written consent of the other party. Provided, however, that a party may
assign this Agreement, without the consent of the other party, to (a) a
purchaser of all or substantially all of the assigning party's assets or a
majority or controlling interest in the assigning party's voting stock, provided
that the purchaser's net worth at the time of purchase is equal to or greater
than that of the assigning party, and further provided that the purchaser is not
a competitor of the other party to this Agreement; or (b) to a present or future
subsidiary or affiliate of the assigning party.

13. GOVERNING LAW. This Agreement shall be governed and controlled in all
respects by the laws of the State of Minnesota, excluding its conflict of law
rules.

14. ENTIRE AGREEMENT. This consignment agreement, and the accompanying exhibits,
contains all the terms and conditions with respect to the consignment of the
Consignment Products named herein. No modification of these terms and conditions
shall be of any force unless such modification is reduced to writing and signed
by the undersigned Consignor and Consignee. However, the parties may from time
to time amend the description of products and Agreed Cost terms contained on
EXHIBIT A, without necessarily reducing the same to a writing signed by both
parties.

CONSIGNOR: SLS INTERNATIONAL, INC.

By:
     ---------------------------------------------------------

Name:    Steven Lamar

Title:   President

Date:    February 21, 2006

CONSIGNEE:        BEST BUY PURCHASING LLC

By:
         -----------------------------------------------------

Name:    Daniel Moe

Title:   VP- Vendor Management

Date:    February 28, 2006

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2-11-03 Best Buy version                                                  Page 4

<PAGE>

                       EXHIBIT A TO CONSIGNMENT AGREEMENT

DESCRIPTION OF CONSIGNMENT CONSIGNMENT PRODUCTS                   AGREED COST

SKU # TBD
Consignment Product Description:                                  $    /Unit
5.1 Black 1000 watt Home Theater in a Box with Subwoofer

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2-11-03 Best Buy version                                                  Page 5

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