APISB550MK23.1 CHANNEL SOUNDBAR WITH WIRELESS SUBWOOFER

Harman International Industries, Inc

Application Details

Equipment Class: DTS - Digital Transmission System
Date of Grant: Jun 05, 2026
Application Purpose: Original Equipment
Equipment Note: 3.1 CHANNEL SOUNDBAR WITH WIRELESS SUBWOOFER
Frequency Range: 2402.00000000 - 2480.00000000
Company: Harman International Industries, Inc
Country: United States

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Attestation Statements

Harman International Industries, Inc Covered Equipment Certification Attestation Letter 2026-05-18 Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: APISB550MK2 Harman International Industries, Inc (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Harman International Industries, Inc (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Harman International Industries, Inc (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Signed: Printed name: Terry Shi Title: Senior Prin.Engineer,Regulatory Compliance, Quality Company Name: Harman International Industries, Inc Address: 8500 Balboa Boulevard, Northridge, CA 91329, United States Phone: 86-75523189391 E-Mail: [email protected] Date: 2026-05-18

Attestation Statements

Harman International Industries, Inc U.S. Agent Designation for Service of Process - Certification Attestation Letter Harman International Industries, Inc 8500 Balboa Boulevard, Northridge, CA 91329, United States Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA 2026-05-18 Attestation Statement according to 2.911(d)(7) FCC ID: APISB550MK2 TO WHOM IT MAY CONCERN: We, Harman International Industries, Inc designate ourselves to act as U.S. agent for service of process. Harman International Industries, Inc hereby acknowledges the obligation of the U.S. agent for service of process. Further Harman International Industries, Inc accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Sincerely Applicant Signed/ Designated Agent Signed: Signature: Company name: Harman International Industries, Inc FRN: 0024748147 Address: 8500 Balboa Boulevard, Northridge, CA 91329, United States Contact Person: Terry Shi Telephone No: 86-75523189391 Email: [email protected]

Cover Letter(s)

Harman International Industries, Inc 2026-05-18 Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 AUTHORITY TO ACT AS AGENT - FCC On our behalf, I appoint Damon Hu, Guangdong Dongdian Testing Service Co.,Ltd.( Unit 2, Building 1, No.17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808), to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in FCC regulations will have affixed to it a label identical to that submitted for approval with this application. In signing this letter, Applicant certifies that neither the applicant nor any party to the application is not subject to a denial of Federal benefits, that include FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. § 862 because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the definition of a "party" for these purposes. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, as specified by Nemko North America Inc., still resides still resides with us. Sincerely, Printed name: Terry Shi Title: Senior Prin.Engineer,Regulatory Compliance, Quality Company Name: Harman International Industries, Inc Address: 8500 Balboa Boulevard, Northridge, CA 91329, United States Phone: 86-75523189391 E-Mail: [email protected] Date: 2026-05-18

Cover Letter(s)

Harman International Industries, Inc Product Similarity Declaration Product name: 3.1 CHANNEL SOUNDBAR WITH WIRELESS SUBWOOFER Model name: CINEMA SB550MK2, CINEMA SB551MK2, CINEMA SB552MK2, CINEMA SB553MK2, CINEMA SB554MK2, CINEMA SB555MK2, CINEMA SB556MK2, CINEMA SB557MK2, CINEMA SB558MK2, CINEMA SB559MK2, CINEMA SB570MK2, CINEMA SB571MK2, CINEMA SB572MK2, CINEMA SB573MK2, CINEMA SB574MK2, CINEMA SB575MK2, CINEMA SB576MK2, CINEMA SB577MK2, CINEMA SB578MK2, CINEMA SB579MK2 FCC ID： APISB550MK2 We (Harman International Industries, Inc) hereby state that all the models are electrical identical including the same hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure, only the model number are different. Signature: Name: Terry Shi Title: Senior Prin.Engineer,Regulatory Compliance, Quality Place United States, date 2026-05-18

Cover Letter(s)

Harman International Industries, Inc 2026-05-18 Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 REQUEST FOR CONFIDENTIALITY – FCC FCC ID: APISB550MK2 Pursuant to Sections 0.457(d) and 0.459 of the Commission’s Rules and FCC Guidance document 726920, we hereby request permanent confidential treatment of exhibits identified as such in the table below and request they are permanently withheld from public review based on the documents containing trade secrets and proprietary information not customarily released to the public. The public disclosure of this information might be harmful to the applicant and provide unjustified benefits to its competitors. We also request short-term confidentiality on certain exhibits until the intended date of marketing as outlined below. We request the exhibits be withheld from public view for a period of 180 days. We attest marketing of the product will only commence after the period of short-term confidentiality expires, or if marketing is to commence before the requested number of days listed above, the grantee will inform Nemko to release the Short-Term Confidentiality information withheld on the FCC equipment authorization website. Exhibit Type of Confidentiality Requested Block Diagrams ☒ Permanent ☐ Short Term External Photos ------------------ ☒ Short Term Internal Photos ☐ Permanent* ☒ Short Term Operation Description ☒ Permanent ☐ Short Term Parts List & Placement/BOM ☐ Permanent ☐ Short Term Tune-Up Procedure ☐ Permanent ☐ Short Term Schematic Diagrams ☒ Permanent ☐ Short Term Test Setup Photos ------------------ ☒ Short Term User’s Manual ☐ Permanent* ☒ Short Term The asterisked items (*) require further information to be provided in this justification letter before permanent confidentiality will be extended to these exhibits. Please refer to FCC KDB 726920 D01 found at: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731 and review section II, 3) regarding specific information that must accompany these requests. Note: any documents held under the Short-Term confidentiality will automatically become public after the requested time if an appropriate extension request has not been received. Any exhibits (i.e., schematic diagrams) that may have already been requested to have “Permanent” confidentiality as shown above need not be repeated under Short-Term confidentiality request. Sincerely, Signed: Printed name: Terry Shi Title: Senior Prin.Engineer,Regulatory Compliance, Quality Company Name: Harman International Industries, Inc Address: 8500 Balboa Boulevard, Northridge, CA 91329, United States Phone: 86-75523189391 E-Mail: [email protected] Date: 2026-05-18

RF Exposure Info

Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E05 TRF No.: RT-4-E-006Page 1 of 8 RF EXPOSURE REPORT Applicant : Harman International Industries, Inc. Address of Applicant : 8500 Balboa Boulevard, Northridge, CA 91329, UNITED STATES Manufacturer : Harman International Industries, Inc. Address of Manufacturer : 8500 Balboa Boulevard, Northridge, CA 91329, UNITED STATES Equipment under Test : 3.1 CHANNEL SOUNDBAR WITH WIRELESS SUBWOOFER Model No. : CINEMA SB550MK2, CINEMA SB551MK2, CINEMA SB552MK2, CINEMA SB553MK2, CINEMA SB554MK2, CINEMA SB555MK2, CINEMA SB556MK2, CINEMA SB557MK2, CINEMA SB558MK2, CINEMA SB559MK2, CINEMA SB570MK2, CINEMA SB571MK2, CINEMA SB572MK2, CINEMA SB573MK2, CINEMA SB574MK2, CINEMA SB575MK2, CINEMA SB576MK2, CINEMA SB577MK2, CINEMA SB578MK2, CINEMA SB579MK2 FCC ID : APISB550MK2 Test Standard(s) : KDB447498 D01 General RF Exposure Guidance v06 Report No. : DDT-RE26031214-2E05 Issue Date : 2026/06/03 Issue By : Guangdong Dongdian Testing Service Co., Ltd. Unit 2, Building 1, No. 17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808 Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E05 TRF No.: RT-4-E-006Page 2 of 8 Table of Contents 1.General Test Information..............................................................................................5 1.1.Description of EUT .......................................................................................................5 1.2.Accessories of EUT......................................................................................................5 1.3.Test laboratory .............................................................................................................6 2.RF Exposure evaluation for FCC .................................................................................7 2.1.Assessment procedure.................................................................................................7 2.2.Assess result ................................................................................................................8 Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E05 TRF:RT-4-E-006Page 3 of 8 $!CeMetaLims!digital$ Test Report Declare Applicant : Harman International Industries, Inc. Address of Applicant : 8500 Balboa Boulevard, Northridge, CA 91329, UNITED STATES Equipment under Test : 3.1 CHANNEL SOUNDBAR WITH WIRELESS SUBWOOFER Model No. : CINEMA SB550MK2, CINEMA SB551MK2, CINEMA SB552MK2, CINEMA SB553MK2, CINEMA SB554MK2, CINEMA SB555MK2, CINEMA SB556MK2, CINEMA SB557MK2, CINEMA SB558MK2, CINEMA SB559MK2, CINEMA SB570MK2, CINEMA SB571MK2, CINEMA SB572MK2, CINEMA SB573MK2, CINEMA SB574MK2, CINEMA SB575MK2, CINEMA SB576MK2, CINEMA SB577MK2, CINEMA SB578MK2, CINEMA SB579MK2 Manufacturer : Harman International Industries, Inc. Address of Manufacturer : 8500 Balboa Boulevard, Northridge, CA 91329, UNITED STATES Test Standard Used: KDB447498 D01 General RF Exposure Guidance v06 We Declare: The equipment described above is tested by Guangdong Dongdian Testing Service Co., Ltd. and in the configuration tested the equipment complied with the standards specified above. The test results are contained in this test report and Guangdong Dongdian Testing Service Co., Ltd. is assumed of full responsibility for the accuracy and completeness of these tests. Report No.:DDT-RE26031214-2E05 Date of Receipt:2026/03/16Date of Test:2026/03/18~2026/05/15 Note: This report applies to above tested sample only. This report shall not be reproduced in parts without written approval of Guangdong Dongdian Testing Service Co., Ltd. Created: Jacky HuangReviewed: Johnson HuangApproved: Damon Hu 2026/05/162026/06/022026/06/03 Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E05 TRF:RT-4-E-006Page 4 of 8 Revision History VersionRevision ContentIssue DateApproved V0Initial issue2026/06/03Damon Hu Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E05 TRF:RT-4-E-006Page 5 of 8 1. General Test Information 1.1. Description of EUT EUT Name:3.1 CHANNEL SOUNDBAR WITH WIRELESS SUBWOOFER Model Number: CINEMA SB550MK2, CINEMA SB551MK2, CINEMA SB552MK2, CINEMA SB553MK2, CINEMA SB554MK2, CINEMA SB555MK2, CINEMA SB556MK2, CINEMA SB557MK2, CINEMA SB558MK2, CINEMA SB559MK2, CINEMA SB570MK2, CINEMA SB571MK2, CINEMA SB572MK2, CINEMA SB573MK2, CINEMA SB574MK2, CINEMA SB575MK2, CINEMA SB576MK2, CINEMA SB577MK2, CINEMA SB578MK2, CINEMA SB579MK2 Difference of model number: Above models are identical in schematic and structure, only the model numbers are different, therefore the test performed on the model: CINEMA SB550MK2 EUT Function Description:Please reference user manual of this device Power Supply:AC 100-240V~ 50/60Hz 30W Antenna Type:FPC antenna Max Antenna Gain (dBi):2.93 Radio Specification:Bluetooth BR/EDR/LE Operation Frequency:2402 MHz to 2480 MHz Modulation: GFSK, π/4-DQPSK, 8DPSK Note: The above EUT information is declared by manufacturer and for more detailed features description please refer to the manufacturer's specifications or User's Manual. 1.2. Accessories of EUT AccessoriesManufacturerModel numberDescription AC cableHarmanN/ALength: 1.5m HDMI cableHarmanN/ALength: 1.2m Remote controlHarmanN/AN/A Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E05 TRF:RT-4-E-006Page 6 of 8 1.3. Test laboratory Guangdong Dongdian Testing Service Co., Ltd. Add.: Unit 2, Building 1, No. 17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808. Tel.: +86-0769-38826678, http://www.dgddt.com, Email: [email protected]. CNAS Accreditation No. L6451; A2LA Accreditation Number: 3870.01 FCC Designation Number: CN1182, Test Firm Registration Number: 540522 Innovation, Science and Economic Development Canada Site Registration Number: 10288A Conformity Assessment Body identifier: CN0048 VCCI facility registration number: C-20087, T-20088, R-20123, R-20240, G-20118 Guangdong Dongdia…

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Test Report

Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF:RT-4-E-005Page 41 of 86 10. Duty Cycle 10.1. Block diagram of test setup 10.2. Limit Just for Report. 10.3. Test procedure (1) Connected the EUT’s antenna port to the Spectrum Analyzer by suitable attenuator, The cable loss and attenuator loss have been put into spectrum analyzer as amplitude offset. set the Spectrum Analyzer as below: Centre Frequency: The centre frequency of the middle hopping channel. Resolution BW: 10 MHz. Video BW: 10 MHz. Span: Zero span. Detector: Peak. Trace Mode: Clear Write. Sweep: Video Trigger (2) When the trace is complete, measure the sending time of 1 burst and the duty cycle of 1 burst cycle. (3) Calculate dwell time follow below formula: Duty cycle= Pulse’s on time / Burst cycleAppendix H: Duty Cycle Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF:RT-4-E-005Page 42 of 86 10.4. Test result Test Engineer:Zeng ZhongyaoTest Site:RF Measurement System 3# Ambient Condition: 23.7°C,48.9%RH Test Date:2026.03.30 Test Power Supply:AC 120VSample Number:S26031214-003 Test ModeAntenna Frequency [MHz] ON Time [ms] Period [ms] Duty Cycle [%] Duty Cycle Factor [dB] 24022.132.2495.090.22 24402.132.2495.090.22 BLE_1MAnt1 24802.132.2495.090.22 24041.081.1990.760.42 24401.081.1990.760.42 BLE_2MAnt1 24781.081.1990.760.42 Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF:RT-4-E-005Page 43 of 86 10.5. Test graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF:RT-4-E-005Page 44 of 86 BLE_2M_Ant1_2404 BLE_2M_Ant1_2440 BLE_2M_Ant1_2478 Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF:RT-4-E-005Page 45 of 86 11. Antenna Requirements 11.1. Limit For intentional device, according to FCC 47 CFR Section 15.203, an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. And according to FCC 47 CFR Section 15.247 (b), if transmitting antennas of directional gain greater than 6 dBi are used, the power shall be reduced by the amount in dB that the directional gain of the antenna exceeds 6 dBi. For intentional device, according to RSS-Gen issue 5 section 6.8. The applicant for equipment certification shall provide a list of all antenna types that may be used with the transmitter, where applicable (i.e. for transmitters with detachable antenna), indicating the maximum permissible antenna gain (in dBi) and the required impedance for each antenna. The test report shall demonstrate the compliance of the transmitter with the limit for maximum equivalent isotropically radiated power (e.i.r.p.) specified in the applicable RSS, when the transmitter is equipped with any antenna type, selected from this list. 11.2. Result The antenna used for this product as Antenna information described in section 2.1 of the report, and there is no other antenna than that furnished by the responsible party shall be used with the device. Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF:RT-4-E-005Page 46 of 86 12. Radiated Emission 12.1. Test equipment EquipmentManufacturerModel No.Serial No.Cal Due To Cal. Interval High pass filterMicro-TronicsHPM50102DDT-ZC005612027/02/271 Year RF cable Zhongke Junchuang Z805UF-NJ-NJ- 10M DDT-ZC055912026/10/101 Year RF cable Zhongke Junchuang Z805UF-NJ-NJ-3MDDT-ZC055902026/10/101 Year RF cable Zhongke Junchuang JCTB510-NJW- NJW-0.6M DDT-ZC045952026/10/101 Year RF cable Zhongke Junchuang JCT40P-2.92J- 2.92J-1M DDT-ZC038022026/10/101 Year RF cableYuhu Technology ZT26S-SMAJ- SMAJ-1M DDT-ZC020372026/10/101 Year RF cable Zhongke Junchuang JCT40P-2.92J- 2.92J-5M DDT-ZC038002026/10/101 Year Radiation disturbance fully automated test software TonscendJS32-REDDT-ZC02739// Pre-amplifierSONOMA310NDDT-ZC019692026/07/061 Year Pre-amplifierCOM-POWERPAM-840ADDT-ZC016932027/03/051 Year Pre-amplifierCOM-POWERPAM-118ADDT-ZC012932026/08/101 Year EMI TEST RECEIVER R&SESU26DDT-ZC019092027/02/271 Year Micro-Tronics filtersREBESBRM50702DDT-ZC03242// High pass filterMicro-TronicsHPM50108DDT-ZC005602027/02/271 Year High Pass filterXi'an XingboXBLBQ-GTA67DDT-ZC021792027/02/271 Year Micro-Tronics filtersREBESBRM50716DDT-ZC03240// Broad-Band Horn Antenna SchwarzbeckBBHA 9170DDT-ZC005062027/03/041 Year Trilog Broadband Antenna SchwarzbeckVULB 9163DDT-ZC020502026/07/251 Year Hochgewinn- Hornantenne SCHWARZBECKBBHA 9120 DDDT-ZC021292026/08/111 Year Active Loop Antenna SchwarzbeckFMZB1519DDT-ZC005242026/08/181 Year PSA Series Spectrum Analyzer AgilentE4447ADDT-ZC005172027/02/271 Year Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF:RT-4-E-005Page 47 of 86 12.2. Block diagram of test setup ANTENNA ELEVATION VARIES FROM1TO4METERS 3m EUTand SupportSystem Turntable 1.5m(L)*1.0m(W)*0.8m(H) Semi-anechoicChamber EMI TestReceiverPC System Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF:RT-4-E-005Page 48 of 86 12.3. Limits (1) FCC 15.205 Restricted frequency band MHzMHzMHzGHz 0.090-0.11016.42-16.423399.9-4104.5-5.15 1 0.495-0.50516.69475-16.69525608-6145.35-5.46 2.1735-2.190516.80425-16.80475960-12407.25-7.75 4.125-4.12825.5-25.671300-14278.025-8.5 4.1772&4.1777537.5-38.251435-1626.59.0-9.2 4.2072&4.2077573-74.61645.5-1646.59.3-9.5 6.215-6.21874.8-75.21660-171010.6-12.7 6.26775-6.26825108-121.941718.8-1722.213.25-13.4 6.31175-6.31225123-1382200-230014.47-14.5 8.291-8.294149.9-150.052310-239015.35-16.2 8.362-8.366156.52475-156.525252483.5-250017.7-21.4 8.37625-8.38675156.7-156.92690-290022.01-23.12 8.41425-8.41475162.0125-167.173260-326723.6-24.0 12.29-12.293167.72-173.23332-333931.2-31.8 12.51975-12.52025240-2853345.8-335836.43-36.5 12.57675-12.57725322-335.43600-4400( 2 ) 13.36-13.41 1Until February 1, 1999, this restricted band shall be 0.490-0.510 MHz 2Above 38.6 ANTENNA ELEVATION VARI…

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Test Report

Shenzhen World Elite Electronic Co. LTD. Sample Approval Sheet Product Information ： Customer Guangzhou Panyu Juda Car Audio Equipment Co., Ltd. Material Description HSB3141 BT Antenna Customer’s Part number 1343SB3141022 Specifications FR4（41*14*0.2mm）+Black Coaxial Cable（φ1.13*250mm） +Welding+UV adhesive+Sponge Supplier’s Part number 01-05-001-000051 Date 2026-5-21 Supplier ： Prepared ByChecked ByApproved By Zhang DengqiaoLi YuepengZhang Hongying Customer Approval ： Accepted ByChecked ByApproved By Results ： □Full Approval □Conditional Approval □Unqualified □Others: Shenzhen World Elite Electronic Co. LTD. Add:Xiangyuer Industrial Park, No. 8, Longsheng Road, Longgang Street, Longgang District, Shenzhen, Guangdong, China Tel:86-755-89983786 Page 2 Contents 1、Specification...................................................................... 3 1.1 Electrical specification standard......................................................3 1.1.1 Electrical Specifications..........................................................................3 1.1.2 Antenna Matching Network......................................................................3 2、Test...........................................................................................3 2.1 Test of passive S11........................................................................3 2.1.1 Test connection......................................................................................3 2.1.2 Passive S11............................................................................................4 2.2 Gain and efficiency test.................................................................4 2.2.1 Test Position..........................................................................................4 2.2.2 Test equipment.......................................................................................4 2.2.3 Results Summary....................................................................................5 2.2.4 Radiation Pattern Results.........................................................................5 2.3 OTA test....................................................................................6 2.3.1 Results Summary....................................................................................6 3、Conclusion...................................................................................7 4、Part Drawing.......................................................................8 Page 3 1 、 Specification This report mainly provides the testing status of various electrical and structural performance parameters of HSB3141 BT Antenna. Figure 1Antenna 1.1 Electrical specification standard 1.1.1 Electrical Specifications The antenna operates in the 2400-2480 MHz . The following table is the electrical performance index of the antenna designed by our company. 1.1.2 Antenna Matching Network 2、Test The antenna was debugged and tested with the prototype provided by the customer. 2.1 Test of passive S11 2.1.1 Test connection The passive S11 test device is connected as follows: Network Analyzer→Test Line→Test Fixture. AntennaHSB3141 BT Antenna Frequency Range2400-2480MHz VSWR< 2.0 Efficiency>50% Impedance50 ohm PolarizationLinear polarization ElementValue E1(0402) 0.5pF E2(0402) 2.4nH E3(0402) 0.5pF Page 4 2.1.2Passive S11 The following table shows the standing wave ratio values of the edge frequency points of the antenna operating frequency band.The waveform of Return Loss and VSWR obtained by the test is shown as follows. Frequency(MHz)24002440 2480 VSWR1.201.171.15 Return Loss-20.78-22.15-23.29 2.2 Gain and efficiency test 2.2.1Test Position Microwave anechoic chamber, the test frequency range is 400MHz-6GHz. 2.2.2Test equipment Network analyzer, standard horn antenna, multi-probe near field antenna test system, test computer, etc Page 5 2.2.3 Results Summary In the microwave anechoic chamber, the measured values related to efficiency and gain are shown in the table below. Frequency(MHz)Gain(dBi)Efficency(%) 24002.6651.50 24102.8652.83 24202.9153.36 24302.9253.59 24402.9353.60 24502.8953.34 24602.7252.50 24702.5952.46 24802.4152.46 24902.5452.70 25002.7653.70 2.2.4 Radiation Pattern Results Page 6 2.3 OTA test 2.3.1 Results Summary ChannelsTRPTIS 04.83-90.81 394.81-90.37 785.40-90.13 Page 7 3 、 Conclusion This antenna is designed on the basis of the prototype provided by the customer. The above electrical performance parameters are tested under the environmental treatment conditions of the test prototype. The electrical parameters and structural performance have met the technical requirements. Please confirm! Page 8 4 、 Part Drawing

Test Report

Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF: RT-4-E-005Page 1 of 86 RADIO TEST REPORT Applicant:Harman International Industries, Inc. Address of Applicant: 8500 Balboa Boulevard, Northridge, CA 91329, UNITED STATES Manufacturer:Harman International Industries, Inc. Address of Manufacturer: 8500 Balboa Boulevard, Northridge, CA 91329, UNITED STATES Equipment under Test: 3.1 CHANNEL SOUNDBAR WITH WIRELESS SUBWOOFER FCC Model No.: CINEMA SB550MK2, CINEMA SB551MK2, CINEMA SB552MK2, CINEMA SB553MK2, CINEMA SB554MK2, CINEMA SB555MK2, CINEMA SB556MK2, CINEMA SB557MK2, CINEMA SB558MK2, CINEMA SB559MK2, CINEMA SB570MK2, CINEMA SB571MK2, CINEMA SB572MK2, CINEMA SB573MK2, CINEMA SB574MK2, CINEMA SB575MK2, CINEMA SB576MK2, CINEMA SB577MK2, CINEMA SB578MK2, CINEMA SB579MK2 IC Model No.:CINEMA SB550MK2 FCC ID:APISB550MK2 IC:6132A-SB550MK2 HVIN:SB550MK2 Test Standard(s): FCC Rules and Regulations Part 15 Subpart C, ANSI C63.10-2020, RSS-247 Issue 4 July 24, 2025, RSS-Gen Issue 5, Apr. 2018, Amendment 2 (February 2021), ANSI C63.10-2020+Cor.1-2023+C63.10a-2024+Errata to C63.10a-2024 Report No.:DDT-RE26031214-2E02 Issue Date:2026/06/03 Issue By: Guangdong Dongdian Testing Service Co., Ltd. Unit 2, Building 1, No. 17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808 Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE26031214-2E02 TRF: RT-4-E-005Page 2 of 86 Table of Contents 1.Summary of Test Results .............................................................................................7 2.General Test Information..............................................................................................8 2.1.Description of EUT .......................................................................................................8 2.2.Accessories of EUT......................................................................................................9 2.3.Block diagram of EUT configuration for test.................................................................9 2.4.Decision of final test mode .........................................................................................10 2.5.Deviations of test standard.........................................................................................10 2.6.Test environment conditions ......................................................................................10 2.7.Test laboratory ...........................................................................................................11 2.8.Measurement uncertainty...........................................................................................11 3.Equipment Used During Conductive Test ..................................................................12 4.6 dB Bandwidth ..........................................................................................................13 4.1.Block diagram of test setup ........................................................................................13 4.2.Limits ..........................................................................................................................13 4.3.Test procedure ...........................................................................................................13 4.4.Test result...................................................................................................................14 4.5.Test graphs ................................................................................................................15 5.99% Bandwidth ..........................................................................................................17 5.1.Block diagram of test setup ........................................................................................17 5.2.Limits ..........................................................................................................................17 5.3.Test procedure ...........................................................................................................17 5.4.Test result...................................................................................................................18 5.5.Test graphs ................................................................................................................19 6.Maximum Peak Output Power....................................................................................21 6.1.Block diagram of test setup ........................................................................................21 6.2.Limits ..........................................................................................................................21 6.3.Test procedure ...........................................................................................................21 6.4.Test result...................................................................................................................22 6.5.Test graphs ................................................................................................................23 7.Power Spectral Density ......................…

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Contact Information

Applicant

Terry Shi(Prin.Engineer,Regulatory Compliance, Quality)

[email protected]Fax: 818-892-0325

Technical Contact

Harman International Industries, IncTerry Shi

[email protected]

8500 Balboa Boulevard · Northridge, California, 91329 · United States

Test Firm

Guangdong Dongdian Testing Service Co., Ltd.Mr. Jamy Yu

[email protected]

Technical Specifications

#	Rule Parts	Frequency Range	Power Output
1	15C	2.40 GHz - 2.48 GHz	13.61 mW

Confidentiality

Long Term

Grant Notes

Output power listed is conducted. This device must be installed and operated so as to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter, except in accordance with FCC multi-transmitter product procedures.