2AD4XMC50BTWireless Headphones with Wide-Band Active Noise Cancelling

MC-50BT / MC-60BT Wireless Headphones with Wide-Band Active Noise Cancelling ENESFRDE QUICK START GUIDE www.mackie.com 2 MC-50BT and MC-60BT Wireless Headphones with Wide-Band Active Noise Cancelling MC-50BT and MC-60BT Wireless Headphones with Wide-Band Active Noise Cancelling 1. Read, follow, and keep these instructions. Heed all warnings. 2. Do not use in or near dangerous environments. This includes driving, cycling, walking, jogging and other areas where traffic is present and accidents could occur. 3. Keep this product and its accessories out of reach of children. Handling or use by children may pose a risk of death or serious injury. Contains small parts and cords that may pose a risk of choking or strangulation. 4. Set the volume level of the audio device to a minimum, and then, after connecting the earphones, adjust the volume gradually. Sudden exposure to loud noises could cause hearing damage. 5. Keep headphones clean. To clean the headphones, wash outside with a mild detergent solution. 6. Do not attempt to modify this product. Doing so could result in personal injury and/or product failure. 7. Do not immerse in water, such as while taking a shower, bath, or washing your face. Otherwise, sound deterioration or failures may result. 8. Do not use while sleeping as accidents may result. 9. Use a slow twisting motion to remove the earphones. Never pull on the earphone cord. 10. Stop using the earphones immediately if they are causing great discomfort, irritation, rash, discharge, or any other uncomfortable reaction. 11. If you are currently receiving ear treatment, consult your physician before using this device. 12. Operating Temperature: 5–45 ̊ C // 41–113 ̊ F (Charging) • -5–55 ̊ C // 23–131 ̊ F (Discharging). 13. This device complies with Part 15 of the FCC Rules [and contains license-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s license-exempt RSS(s)]. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. L’émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: (1) l’appareil ne doit pas produire de brouillage, et (2) l’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement. 14. This equipment complies with ISED radiation exposure limits set forth for an uncontrolled environment. End user must follow the specific operating instructions for satisfying RF exposure compliance. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. The portable device is designed to meet the requirements for exposure to radio waves established by the ISED. These requirements set a SAR limit of 1.6 W/kg averaged over one gram of tissue. The highest SAR value reported under this standard during product certification. 15. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and the receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. CAUTION: Changes or modifications to this device not expressly approved by LOUD Audio, LLC. could void the user’s authority to operate the equipment under FCC rules. Canada ICES-003(B)/NMB-003(B) 16. RF Power: ≤20dBm Bluetooth frequency range: 2400~2483.5 MHz 17. Exposure to extremely high noise levels may cause permanent hearing loss. Individuals vary considerably in susceptibility to noise-induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a period of time. The U.S. Government’s Occupational Safety and Health Administration (OSHA) has specified the permissible noise level exposures shown in the chart. According to OSHA, any exposure in excess of these permissible limits could result in some hearing loss. Duration, per day in hours Sound Level 890 dB 692 dB 495 dB 397 dB 2100 dB 1.5102 dB 1105 dB 0.5 110 dB 0.25 or less115 dB Important Safety Instructions –  NOTE ON STATIC ELECTRICITY  Static electricity accumulated in the body may cause mild tingling in your ears. To minimize the effect, wear clothes made from natural materials. CAUTION — A battery subjected to extremely low air pressure may result in an explosion or the leakage of flammable liquid or gas. High sound pressure. Hearing damage risk. Do not listen at high volume levels for long periods. WARNING — The battery (battery or batteries or battery pack) shall not be exposed to excessive heat such as sunshine, fire or the like. CAUTION — Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type. Correct disposal of this product: This symbol indicates that this product should not be disposed of with you…

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LOUD Audio, LLC 19820 North Creek Parkway #201, Bothell, Washington 98011-8227, United States DATE : 2022-08-12 LOUD Audio, LLC 19820 North Creek Parkway #201, Bothell, Washington 98011-8227, United States Attn: Director of Certification Authority to Act as Agent On our behalf, I appoint below company and person: Name Damon Hu Position Manager Company Name Dongguan Dongdian Testing Service Co.,Ltd. Address 17, Zongbu Road 2, Songshan Lake Sci&Tech, Industry Park, Dongguan City, Guangdong Province, China, 523808 Tel / Fax Tel: +86-0769-38826678-850 E-Mail [email protected] 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 the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. 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 CETECOM GmbH, still resides with: Applicant name LOUD Audio, LLC Address 19820 North Creek Parkway #201, Bothell, Washington 98011-8227, United States Yours sincerely, Signatory Name Kenny Sheng Position Sr. Manager of SQE Company Name LOUD Audio, LLC Address 19820 North Creek Parkway #201, Bothell, Washington 98011-8227, United States Tel / Fax 86-0755-88351509 Extension:112 / 425-487-4337 E-Mail [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 <08/12/2022> TO WHOM IT MAY CONCERN Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b) (4) of the Freedom of Information Act, we request confidentiality for the following products: FCC ID: 2AD4XMC50BT Model name: MC-50BT For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos 180 days Internal Photos 180 days Block Diagram Schematics Test Setup Photos 180 days User’s Manual 180 days Parts List Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, (Signed) Name: Kenny Sheng Company: LOUD Audio, LLC Address: 19820 North Creek Parkway #201, Bothell, Washington 98011-8227, United States Phone: 86-0755-88351509 Extension:112 Fax: 425-487-4337 E-Mail: [email protected]

Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 89 of 100 16. Photos of the EUT Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 90 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 91 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 92 of 100

Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 92 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 93 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 94 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 95 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 96 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 97 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 98 of 100 Bluetooth Antenna Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 99 of 100 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 100 of 100 END OF REPORT

Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 1 of 100 FCC AND ISED CERTIFICATION TEST REPORT FOR Issued By: Dongguan Dongdian Testing Service Co., Ltd. Add.: No. 17, Zongbu Road 2, Songshan Lake Sci&Tech, Industry Park, Dongguan City, Guangdong Province, China, 523808 Tel.: +86-0769-38826678, E-mail: [email protected], http://www.dgddt.com Applicant : LOUD AUDIO, LLC Address : 19820 North Creek Parkway, Suite #201, Bothell, WA 98011-8227, USA Equipment under Test : Wireless Headphones with Wide-Band Active Noise Cancelling Model No. : MC-50BT Trade Mark : FCC ID : 2AD4XMC50BT IC : 12714A-MC50BT Manufacturer : LOUD AUDIO, LLC Address : 19820 North Creek Parkway, Suite #201, Bothell, WA 98011-8227, USA Report No.: DDT-R22062728-2E01 Issued Date: Aug. 11, 2022 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 2 of 100 Table of Contents Test report declares........................................................................................................4 1. Summary of Test Results ............................................................................................... 6 2. General Test Information ............................................................................................... 7 2.1. Description of EUT ......................................................................................................... 7 2.2. Accessories of EUT ........................................................................................................ 8 2.3. Assistant equipment used for test .................................................................................. 8 2.4. Block diagram of EUT configuration for test .................................................................. 8 2.5. Deviations of test standard............................................................................................. 8 2.6. Test environment conditions .......................................................................................... 8 2.7. Test laboratory ............................................................................................................... 9 2.8. Measurement uncertainty ............................................................................................... 9 3. Equipment Used During Test ....................................................................................... 10 4. Maximum Peak Output Power ..................................................................................... 11 4.1. Block diagram of test setup .......................................................................................... 11 4.2. Limits ............................................................................................................................ 11 4.3. Test procedure ............................................................................................................. 11 4.4. Test result ..................................................................................................................... 12 4.5. Original test data .......................................................................................................... 13 5. 20dB Bandwidth and 99% Bandwidth .......................................................................... 16 5.1. Block diagram of test setup .......................................................................................... 16 5.2. Limits ............................................................................................................................ 16 5.3. Test procedure ............................................................................................................. 16 5.4. Test result ..................................................................................................................... 16 5.5. Original test data .......................................................................................................... 17 6. Carrier Frequency Separation ...................................................................................... 23 6.1. Block diagram of test setup .......................................................................................... 23 6.2. Limits ............................................................................................................................ 23 6.3. Test procedure ............................................................................................................. 23 6.4. Test result ..................................................................................................................... 23 6.5. Original test data .......................................................................................................... 24 7. Number of Hopping Channel ....................................................................................... 25 7.1. Block diagram of test setup .......................................................................................... 25 7.2. Limits ............................................................................................................................ 25 7.3. Test procedure ............................................................................................................. 25 7.4. Test result ..................................................................................................................... 25 7.5. Original test data .......................................................................................................... 26 8. Dwell Time .................................................................................................................... 27 Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 3 of 100 8.1. Block diagram of test setup .......................................................................................... 27 8.2. Limits ...................................................…

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Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 75 of 100 TR-4-E-009 Radiated Emission Test Result Test Site : DDT 3m Chamber 3# D:\E3 6.111\2022 Report Data\Q22062728-2E MC-50BT\FCC ABOVE 1G .EM6 Test Date : 2022-07-27 Tested By : Bairong EUT : Wireless Headphones with Wide-Band Active Noise Cancelling Model Number : MC-50BT Power Supply : Battery Test Mode : Tx Mode Condition : Temp:22°C,Humi:59.4%,Press:100.3kPa Antenna/Distance : 2021 BBHA 9120D 3#/3m/VERTICAL Memo : 3DH5 2402 Data: 18 Note: 1. Result Level = Read Level + Antenna Factor + Cable loss + Filter Factor - PRM Factor. 2. If Peak Result complies with AV limit, AV Result is deemed to comply with AV limit. 3. Test setup: RBW: 1 MHz, VBW: 3 MHz, Sweep time: auto. Item Freq. Read Level Antenna Factor PRM Factor Cable Loss Filter Factor Result Level Limit Line Over Limit Detector Polarization (Mark) (MHz) (dBμV) (dB/m) dB dB dB (dBμV/m) (dBμV/m) (dB) 1 2389.40 54.19 27.40 39.59 1.71 0.72 44.43 74.00 -29.57 Peak VERTICAL 2 2390.00 48.68 27.40 39.60 1.71 0.72 38.91 74.00 -35.09 Peak VERTICAL Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 76 of 100 TR-4-E-009 Radiated Emission Test Result Test Site : DDT 3m Chamber 3# D:\E3 6.111\2022 Report Data\Q22062728-2E MC-50BT\FCC ABOVE 1G .EM6 Test Date : 2022-07-27 Tested By : Bairong EUT : Wireless Headphones with Wide-Band Active Noise Cancelling Model Number : MC-50BT Power Supply : Battery Test Mode : Tx Mode Condition : Temp:22°C,Humi:59.4%,Press:100.3kPa Antenna/Distance : 2021 BBHA 9120D 3#/3m/HORIZONTAL Memo : DH5 2480 Data: 19 Note: 1. Result Level = Read Level + Antenna Factor + Cable loss + Filter Factor - PRM Factor. 2. If Peak Result complies with AV limit, AV Result is deemed to comply with AV limit. 3. Test setup: RBW: 1 MHz, VBW: 3 MHz, Sweep time: auto. Item Freq. Read Level Antenna Factor PRM Factor Cable Loss Filter Factor Result Level Limit Line Over Limit Detector Polarization (Mark) (MHz) (dBμV) (dB/m) dB dB dB (dBμV/m) (dBμV/m) (dB) 1 2483.50 61.55 27.57 39.64 1.74 0.73 51.95 74.00 -22.05 Peak HORIZONTAL 2 2483.58 60.73 27.57 39.64 1.74 0.73 51.13 74.00 -22.87 Peak HORIZONTAL Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 77 of 100 TR-4-E-009 Radiated Emission Test Result Test Site : DDT 3m Chamber 3# D:\E3 6.111\2022 Report Data\Q22062728-2E MC-50BT\FCC ABOVE 1G .EM6 Test Date : 2022-07-27 Tested By : Bairong EUT : Wireless Headphones with Wide-Band Active Noise Cancelling Model Number : MC-50BT Power Supply : Battery Test Mode : Tx Mode Condition : Temp:22°C,Humi:59.4%,Press:100.3kPa Antenna/Distance : 2021 BBHA 9120D 3#/3m/VERTICAL Memo : DH5 2480 Data: 20 Note: 1. Result Level = Read Level + Antenna Factor + Cable loss + Filter Factor - PRM Factor. 2. If Peak Result complies with AV limit, AV Result is deemed to comply with AV limit. 3. Test setup: RBW: 1 MHz, VBW: 3 MHz, Sweep time: auto. Item Freq. Read Level Antenna Factor PRM Factor Cable Loss Filter Factor Result Level Limit Line Over Limit Detector Polarization (Mark) (MHz) (dBμV) (dB/m) dB dB dB (dBμV/m) (dBμV/m) (dB) 1 2483.50 59.95 27.57 39.64 1.74 0.73 50.35 74.00 -23.65 Peak VERTICAL 2 2483.60 59.29 27.57 39.64 1.74 0.73 49.69 74.00 -24.31 Peak VERTICAL Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 78 of 100 TR-4-E-009 Radiated Emission Test Result Test Site : DDT 3m Chamber 3# D:\E3 6.111\2022 Report Data\Q22062728-2E MC-50BT\FCC ABOVE 1G .EM6 Test Date : 2022-07-27 Tested By : Bairong EUT : Wireless Headphones with Wide-Band Active Noise Cancelling Model Number : MC-50BT Power Supply : Battery Test Mode : Tx Mode Condition : Temp:22°C,Humi:59.4%,Press:100.3kPa Antenna/Distance : 2021 BBHA 9120D 3#/3m/HORIZONTAL Memo : 2DH5 2480 Data: 21 Note: 1. Result Level = Read Level + Antenna Factor + Cable loss + Filter Factor - PRM Factor. 2. If Peak Result complies with AV limit, AV Result is deemed to comply with AV limit. 3. Test setup: RBW: 1 MHz, VBW: 3 MHz, Sweep time: auto. Item Freq. Read Level Antenna Factor PRM Factor Cable Loss Filter Factor Result Level Limit Line Over Limit Detector Polarization (Mark) (MHz) (dBμV) (dB/m) dB dB dB (dBμV/m) (dBμV/m) (dB) 1 2483.50 60.24 27.57 39.64 1.74 0.73 50.64 74.00 -23.36 Peak HORIZONTAL 2 2483.58 60.18 27.57 39.64 1.74 0.73 50.58 74.00 -23.42 Peak HORIZONTAL Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 79 of 100 TR-4-E-009 Radiated Emission Test Result Test Site : DDT 3m Chamber 3# D:\E3 6.111\2022 Report Data\Q22062728-2E MC-50BT\FCC ABOVE 1G .EM6 Test Date : 2022-07-27 Tested By : Bairong EUT : Wireless Headphones with Wide-Band Active Noise Cancelling Model Number : MC-50BT Power Supply : Battery Test Mode : Tx Mode Condition : Temp:22°C,Humi:59.4%,Press:100.3kPa Antenna/Distance : 2021 BBHA 9120D 3#/3m/VERTICAL Memo : 2DH5 2480 Data: 22 Note: 1. Result Level = Read Level + Antenna Factor + Cable loss + Filter Factor - PRM Factor. 2. If Peak Result complies with AV limit, AV Result is deemed to comply with AV limit. 3. Test setup: RBW: 1 MHz, VBW: 3 MHz, Sweep time: auto. Item Freq. Read Level Antenna Factor PRM Factor Cable Loss Filter Factor Result Level Limit Line Over Limit Detector Polarization (Mark) (MHz) (dBμV) (dB/m) dB dB dB (dBμV/m) (dBμV/m) (dB) 1 2483.50 59.69 27.57 39.64 1.74 0.73 50.09 74.00 -23.91 Peak VERTICAL 2 2483.55 59.91 27.57 39.64 1.74 0.73 50.31 74.00 -23.69 Peak VERTICAL Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 80 of 100 TR-4-E-009 Radiated Emission Test Result Test Site : DDT 3m Chamber 3# D:\E3 6.111\2022 Report Data\Q22062728-2E MC-50BT\FCC ABOVE 1G .EM6 Test Date : 2022-07-27 Tested By : Bairong EUT : Wireless Headphones with Wide-Band Active Noise Cancelling Model Number : MC-50BT Power Supply : Battery Test Mode : Tx Mode Condition : Temp:22°C,Humi:59.4%,Press:100.3kPa Antenna/Distance : 2021 BBHA 9120D 3#/3m/HORIZONTAL Me…

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Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 87 of 100 15. Test Setup Photograph Dongguan Dongdian Testing Service Co., Ltd. Report No.: DDT-R22062728-2E01 Page 88 of 100