O7VMA120201Amplifier

WARNING • TO PREVENT FIRE OR SHOCK HAZARD, DO NOT USE THIS PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE • TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE • TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE PLUG TO WIDE SLOT AND FULLY INSERT. This lightning flash with an arrow head symbol, within an equilateral triangle, is intended to alert the user to the presence of un-insulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to the persons. Warning: To reduce the risk of electric shock, do not remove cover (or back), no user- serviceable parts inside. Refer servicing to qualified service personnel. This exclamation point within an equilateral triangle is intended to alert the user to presence of important maintenance (servicing) instructions in the literature accompanying the appliance. This is a “Class II”, “double insulated apparatus”. This apparatus must NOT have a safety connection to Earth. ENGLISH 1monitoraudio.com Important Safety Instructions 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus with water. 6. Clean only with a dry cloth. Great care and attention has gone into the materials chosen to produce the product. A gentle wipe with a dry, clean cloth is all that is required to remove any dust. Treat it as you would a fine piece of furniture because that is how they have been designed. 7. Do not block any ventilation openings. Install in accordance with Monitor Audio’s instructions. 8. Do not install near any heat source, such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9. Do not defeat the purpose of the polarised or grounding type plug. A polarised plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wider blade or the third prong are provided for your safety. If the provided plug does not fit your outlet, consult an electrician for replacement of the obsolete outlet. 10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 11. Only use attachments/ accessories specified by Monitor Audio. 12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer or sold with the apparatus. When a cart is used, use caution when moving the cart/ apparatus combination to avoid injury from tip-over. 13. Unplug this apparatus during lightening storms, or when unused for long periods of time. 14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen onto the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally or has been dropped. 15. This apparatus shall not be exposed to dripping or splashing water and that no object filled with liquids such as vases shall be placed on the apparatus. 16. The appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable. 17. This exclamation point within an equilateral triangle is intended to alert the user to the presence of important maintenance (servicing) instructions in the literature accompanying the appliance. 18. This product is not for use in an aeroplane. 19. Monitor Audio would discourage using its products in high humidity, extreme hot or cold or outdoor environments unless the product specifically advises suitability for such environments, for clarification of suitable products within the Monitor Audio range please contact a Monitor Audio representative Batteries NOTE: ONLY APPLIES TO PRODUCTS WITH REMOTE CONTROLS WARNING: DO NOT INGEST BATTERY, CHEMICAL BURN HAZARD. The remote control supplied with this product contains a coin/button cell battery. If the coin/button cell battery is swallowed it can cause severe internal burns in just 2 hours and can lead to death. Keep new and used batteries away from children. If the battery compartment does not close securely, stop using the product and keep it away from children. If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention. 1. WARNING: The battery (battery or batteries or battery pack) shall not be exposed to excessive heat such as sunshine, fire or the like 2. No naked flame sources, such as lighted candles, should be placed on the apparatus 3. Battery Warning. Technical Data 1. Temperature range from -5°C to 40°C, humidity: 20% - 80%. 2. AC input voltage: 90V - 263V (Auto range). 2 Important Safety Instructions Re-cycling Correct Disposal of Waste Electrical and Electronic Equipment (WEEE) by User in Private Households in the EU. This symbol on the product or accessories indicates that they must not be disposed of with your household wastes throughout the EU. To prevent possible harm to the environment or human health from uncontrolled waste disposal, recycle it responsibly to promote the sustainable reuse of material resources. Instead it is your responsibility to dispose of your waste equipment by handing it over to a designated WEEE collection point for recycling. The separate collection and recycling of your waste equipment will help conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment. For more specific information about where you can take your equipment for recycling please contact your local city/council office, your local waste disposal service or the outlet where you purchased your product. RoHS Declaration of Conformity Directive 2011/65/EU of the European Parliament and of the Council on the reduction of the us…

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Set Up Guide and Product Manual roksan.com FRONT CONTROLS  4 REAR CONNECTIONS  4 REMOTE  6 OLED DISPLAY  6 SET UP OPERATION  7 VOLUME CONTROL  7 Controls  7 Process & Indicators  7 INPUT SELECTION  8 Controls  8 Process & Indicators  8 TRACK FUNCTIONS  8 Control  8 Process & Indicators  8 OLED DISPLAY LIFE EXTENSION 9 Process & Indicators  9 SPECIFICATIONS  10 FRONT CONTROLS NOPQR 1. Power Button Used to wake the amp from standby and return it to standby when not in use. LED’s will illuminate different colours to show different status. 2. Screen This displays the input. The selected input will be displayed on the screen. When changing inputs, all other inputs will illuminate as they are scrolled through. 3.Volume / Input Selection Dial This dial will adjust the volume, or when pressed and held will scroll through the inputs depending on the direction the dial is turned. 4.Volume LED’s These will illuminate showing the volume level of the amp. When at max volume levelthehapticswillvibrateandthevolumebarwillflash.Whenatminimum volume level the haptics will vibrate and the Mute icon will be displayed. 5.Headphone Jack 3.5mm jack for connecting headphones. The speaker output will mute along with the preamp outputs. REAR CONNECTIONS 13 13 546 2 789 10 1.Loudspeaker Outputs Connect loudspeaker cables to these connections. Positive to positive and negative to negative 2.Turntable Grounding Post Used to ground the tone arm attached to the turntable 3.Phono Input ConnecttheoutputfromtheturntabletotheAttessaStreamingAmplifier 4.Analogue 1 Input Connect and analogue source 5.Analogue 2 Input (music sense) Connect a second analogue input. WHAT IS MUSIC SENSE?? 6.Pre-Out/ Subwoofer Connecttoapoweramplifierorsubwoofer. 7.Coax/Optical SPDIF Inputs Connect digital sources by eaither coaxial or optical connection 8.12V Trigger Input/Output Used to connect a 12v trigger input and output to control (output) or be controlled (input) using the 12v trigger. 9.IR In 10.AC Power Socket Connect using the supplied mains cable. Fuse also located here in drawer. REMOTE Remotefeedback:AllactionshavetheremoteLEDflashonandoff. OLED DISPLAY The inputs available on the amp are scrolled through using the encoder or remote and are displayed using the following default icons: Digital 1 (D1) Coax Digital 2 (D2) Optical SPDIF Analogue 1 (A1) Analogue 1 (A2) Fixed Input Digital 3 (TV) Analogue 3 (Phono)Digital 4 (CD) Digital 5 (Bluetooth) CD SET UP OPERATION 1. Standby A single press of the power button or single press of the standby/power button on the remote and RGB LED goes solid red. 2. Power A single press of the power button or single press of the standby/power button on the remote and RGB LED goes a solid orange colour. 3. Load/warm up phase Roksan logo to appear when product goes into power mode. 4. BLE pairing mode: During set up mode via the app the BLE passkey appears on the screen. VOLUME CONTROL Controls • Rotary dial • Remote Process & Indicators • Incremental increase: clockwise turn of rotary dial or single press of remote + button. LED strip will illuminate more coloured bars. • Incremental decre ase: anti-clockwise turn of rotary dial or single press of remote – button. Illuminated LED bars will reduce. • Muting: A single pr ess of the ‘mute’ button on the remote or incremental rotation until the step 0. • Unmuting: A single pr ess of the ‘mute’ button on the remote. Incremental increase of volume can be used to unmute. LED bar will return to previous volume state • Volume maximum: When all LED bars ar e illuminated. • Headphones connected: mutes attached speakers; volume output goes to ‘safe’ headphone level. LED strip display changes to new volume level. INPUT SELECTION Controls • Rotary dial • Remote Process & Indicators • Selecting input: Rotary dial is pressed and held while user rotates either clockwise & anti-clockwise when selecting. When using the remote the input arrow buttons change the input. OLED will highlight the icon for that selected input. • Connected to input: OLED will display a solid icon for the selected input. • Bluetooth pairing: • Bluetooth disconnected: OLED will display disconnected status. TRACK FUNCTIONS Applicable for Bluetooth Input only Control • Manual buttons • Remote Process & Indicators Track functions are only applicable for the Bluetooth input. 1. Pause: a single press of the play/pause button (remote or manual button) and the dual LED’s toflashon. 2. Play: a single press of the play/pause button (remote or manual button) and the dual LED’s toflashon. 3. Stop state: a single press of the SOC button to access the stop state or a single press of the stop button on the remote. OLED to show the stop icon. 4. Track forward: a single press of the track forward button (remote or manual button) and the right dualLEDtoflashon. 5. Track restart: a single press of the track back button (remote or manual button) and the left dual LEDtoflashon. 6. Track back: a double press of the track back button (remote or manual button) and the left dual LED toflashon. 7. Seek forward: holding of the track forward button and right dual LED to be on for duration of command. 8. Seek back: holding of the track back button and left dual LED to be on for duration of command. 9. Shuffle: singlepressofSRRremotebutton.OLEDtodisplayshuffleicon. 10. Repeat all: double press of SRR remote button. OLED to display repeat all icon. 11. Repeat once: triple press of SRR remote button. OLED to display repeat once icon. Note: Ifthefirstactionistopresstrackforwardortrackbackthiswillautomatically complete the function and then play the track all in one step. OLED DISPLAY LIFE EXTENSION This is controlled using the remote control Process & Indicators 1. Display On/Off: a single press of the disp. button on the remote. 2. Display saver mode: no command for 30 seconds, icons to appear dimmer on the OLED. 3. Display inactive: no comm…

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Set Up Guide and Product Manual roksan.com FRONT CONTROLS  4 User interaction inputs:  4 User interaction outputs:  4 REAR CONNECTIONS  5 REMOTE  6 SET UP OPERATION  6 OLED DISPLAY  7 VOLUME CONTROL  8 Controls  8 Process & Indicators  8 INPUT SELECTION  8 TRACK FUNCTIONS  9 Control  9 Process & Indicators  9 OLED DISPLAY LIFE EXTENSION 11 Process & Indicators  11 BLUOS SYSTEM  11 Control 11 Set-Up 11 BluOS Indicators 11 SPECIFICATIONS 12 FRONT CONTROLS User interaction inputs: • RGB LED button •Manual buttons (Previous, Play/Pause & Next) •Rotary dial •Headphone socket • Roksan app • BluOS app User interaction outputs: • RGB LED button • Dual LED’s • OLED dynamic display • Rotary Dial •LED strip REAR CONNECTIONS 101112 13 13 546 2 789 1.Speaker Inputs Connect loudspeaker cables to these connections. Positive to positive and negative to negative 2.Turntable Grounding Post Used to ground the tone arm attached to the turntable 3.Phono Input ConnecttheoutputfromtheturntabletotheAttessaStreamingAmplifier 4.Analogue 1 Input Connect and analogue source 5.Analogue 2 Input (music sense) Connect a second analogue input. WHAT IS MUSIC SENSE?? 6.Pre-Out/ Subwoofer Connecttoapoweramplifierorsubwoofer. 7.Coax/Optical SPDIF Inputs Connect digital sources by eaither coaxial or optical connection 8.12V Trigger Input/Output Used to connect a 12v trigger input and output to control (output) or be controlled (input) using the 12v trigger. 9.IR In 10.Ethernet/LAN Connect to the LAN via wired connection 11.USB Input/Output 12. Service Port For service only. Do not use. 13.AC Power Socket Connect using the supplied mains cable. Fuse also located here in drawer. IP OP REMOTE Remotefeedback:AllactionshavetheremoteLEDflashonandoff. SET UP OPERATION 1. Standby A single press of the RGB LED button or single press of the standby/power button on the remote and RGB LED goes solid red. 2. Power A single press of the LED button or single press of the standby/power button on the remote and RGB LED goes a solid orange colour. Illustration of RGB LED button detailing orange spiral design in power mode and standby mode. 3.Load/warm up phase Roksan logo to appear when product goes into power mode. 4.BLE pairing mode: During set up mode via the app the BLE passkey appears on the screen. OLED DISPLAY The inputs available on the streamer are scrolled through using the encoder or remote and are displayed using the following icons: Digital 1 (D1) Coax Digital 2 (D2) Optical SPDIF Analogue 1 (A1) Analogue 1 (A2) Fixed Input Digital 3 (TV) Analogue 3 (Phono)Digital 4 (CD) Digital 5 (BluOS)Digital 6 (Bluetooth) CD VOLUME CONTROL Controls • Rotary dial • Remote • BluOS app Process & Indicators • Incremental increase: clockwise turn of rotary dial or single press of remote + button. LED strip will illuminate more coloured bars. •Incremental decre ase: anti-clockwise turn of rotary dial or single press of remote – button. Illuminated LED bars will reduce. •Muting: A single press of the ‘mute’ button on the remote or incremental rotation until the step 0. •Unmuting: A single press of the ‘mute’ button on the remote. Incremental increase of volume can be used to unmute. LED bar will return to previous volume state • Volume maximum: When all LED bars ar e illuminated. •Headphones connected: mutes attached speakers; volume output goes to ‘safe’ headphone level. LED strip display changes to new volume level. INPUT SELECTION Controls • Rotary dial • Remote Process & Indicators • Selecting input: Rotary dial is pressed and held while user r otates either clockwise & anti-clockwise when selecting. When using the remote the input arrow buttons change the input. OLED will highlight the icon for that selected input. • Connected to input: OLED will display a solid icon for the selected input. • Bluetooth pairing: • Bluetooth disconnected: OLED will display disconnected status. TRACK FUNCTIONS Control •Manual buttons • Remote • BluOS app Process & Indicators Track functions are only applicable for the Bluetooth input & BluOS inputs. 1.Pause: a single press of the play/pause button (remote or manual button) and the dual LED’stoflashon. 2.Play: a single press of the play/pause button (remote or manual button) and the dual LED’stoflashon. 3.Stop state: a single press of the SOC button to access the stop state or a single press of the stop button on the remote. OLED to show the stop icon. 4.Track forward: a single press of the track forward button (remote or manual button) and the right dual LEDtoflashon. 5.Track restart: a single press of the track back button (remote or manual button) and the left dual LEDtoflashon. 6.Track back: a double press of the track back button (remote or manual button) and the left dual LED toflashon. 7.Seek forward: holding of the track forward button and right dual LED to be on for duration of command. 8.Seek back: holding of the track back button and left dual LED to be on for duration of command. 9.Shuffle: singlepressofSRRremotebutton.OLEDtodisplayshuffleicon. 10.Repeat all: double press of SRR remote button. OLED to display repeat all icon. 11. Repeat once: triple press of SRR remote button. OLED to display repeat once icon. Note: Ifthefirstactionistopr ess tr ack forwar d ortr ack backthiswillautoma tically  complete the function and then play the track all in one step. OLED DISPLAY LIFE EXTENSION This is controlled using the remote control Process & Indicators 1.Display On/Off: a single press of the disp. button on the remote. 2.Display saver mode: no command for 30 seconds, icons to appear dimmer on the OLED. 3.Display inactive: no command after 60 seconds, the OLED will clear all of icons. 4.Display active: a single press of any command will bring icons back to full brightness, this single press does not change the current state of the CD transport. BLUOS SYSTEM Control • Rotary dial •Roksan app • BluOS app Set-Up •BluOS Attessa set-up: BluOS Indicators •MQA sta…

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MONITOR AUDIO LTD. I, the undersigned, Liam Halpin: These two models are the same except for the control panel and with or without BluOS board. Contains the same wireless circuit, main board and power board. For all models, The BT module used is the same and also contains the same certified modules. 1) Model No.: Attessa Streaming Amplifier (with BluOS board) 2) Model No.: Attessa Integrated Amplifier (without BluOS board) FCC ID: O7VMA120201 Sincerely, Client’s signature : Client’s name / title : Liam Halpin / Quality Director Contact information / address : Unit 2, 24 Brook Road Rayleigh, Essex. England SS6 7XJ, United Kingdom Telephone: +44 (0)1268 798565 Fax No.: +44 (0)1268 740589

DATE : 2021-05-18 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: O7VMA120201 Product Name: Amplifier Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: • Schematics • Block diagram • Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Name：Liam Halpin Title：Quality Director Company：MONITOR AUDIO LTD.

DATE : 2021-05-18 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint EST Technology Co., Ltd. Address:Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China 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, still resides with MONITOR AUDIO LTD. Address: Unit 2, 24 Brook Road Rayleigh, Essex. England SS6 7XJ, United Kingdom Name：Liam Halpin Title：Quality Director Applicant Company：MONITOR AUDIO LTD.

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Attessa Streaming Amplifier Vanity Panel Decal NOTES: 1. ROKSAN LOGO & TEXT TO BE SILK SCREENED 2. COLOUR PANTONE WHITE 11-0601 TCX 3. IMAGE FOR REFERENCE PURPOSES ONLY 4. SCALE 1:1 R L LOUDSPEAKER OUTPUT + - IR INPUT +12V TRIGGER D3D4 PRE OUT /SUB IN/OUTIN/OUT Streaming Amplifier Serial Number: This device complies with part 15 of the FCC Rules. 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. Conforms to UL STD. 62368-1, Certified to CSA STD.C22.2 No. 62368-1 CAN ICES-003 (B)/NMB-003(B). FCC ID: 07VMA120201 IC: 5928A-MA120201 Contains FCC ID: 2AC7Z-ESPWROOM32D Contains IC: 21098-ESPWROOM32D DESIGNED IN BRITAIN, MADE IN CHINA Monitor Audio. 24 Brook Road, Rayleigh, Essex. SS6 7XJ This product must be earthed Attessa Integrated Amplifier Vanity Panel Decal NOTES: 1. ROKSAN LOGO & TEXT TO BE SILK SCREENED 2. COLOUR PANTONE WHITE 11-0601 TCX 3. IMAGE FOR REFERENCE PURPOSES ONLY 4. SCALE 1:1 R L LOUDSPEAKER OUTPUT + - IR INPUT +12V TRIGGER D3D4 PRE OUT /SUB IN/OUTIN/OUT This product must be earthed Integrated Amplifier Serial Number: This device complies with part 15 of the FCC Rules. 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. Conforms to UL STD. 62368-1, Certified to CSA STD.C22.2 No. 62368-1 CAN ICES-003 (B)/NMB-003(B). FCC ID: 07VMA120201 IC: 5928A-MA120201 Contains FCC ID: 2AC7Z-ESPWROOM32D Contains IC: 21098-ESPWROOM32D DESIGNED IN BRITAIN, MADE IN CHINA Monitor Audio. 24 Brook Road, Rayleigh, Essex. SS6 7XJ

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FCC ID: O7VMA120201 EST Technology Co. ,Ltd Report No. ESTE-R2105104 Page 1 of 4 FCC 47 CFR MPE REPORT MONITOR AUDIO LTD. Amplifier Model Number: Attessa Streaming Amplifier Additional Model: Attessa Integrated Amplifier FCC ID: O7VMA120201 Prepared for: MONITOR AUDIO LTD. Unit 2, 24 Brook Road Rayleigh, Essex. England SS6 7XJ, United Kingdom Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2105104 Date of Test: Jan. 04~May. 12, 2021 Date of Report: May. 13, 2021 FCC ID: O7VMA120201 EST Technology Co. ,Ltd Report No. ESTE-R2105104 Page 2 of 4 Maximum Permissible Exposure 1. Applicable Standards Systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as a mobile device whereby a distance of 0.2m normally can be maintained between the user and the device. 1.1. Limits for Maximum Permissible Exposure (MPE) (a) Limits for Occupational/Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times ︱E︱ 2 ,︱H︱ 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-10000 5 6 (b) Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times ︱E︱ 2 ,︱H︱ 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-10000 1.o 30 Note: f=frequency in MHz; *Plane-wave equivalent power density FCC ID: O7VMA120201 EST Technology Co. ,Ltd Report No. ESTE-R2105104 Page 3 of 4 1.2. MPE Calculation Method E (V/m) = d G×P×30 Power Density: Pd (W/m 2 ) = 377 E 2 E = Electric Field (V/m) P = Peak RF output Power (W) G = EUT Antenna numeric gain (numeric) d = Separation distance between radiator and human body (m) The formula can be changed to Pd = 2 d×377 G×P×30 From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of the used antenna, the RF power density can be obtained FCC ID: O7VMA120201 EST Technology Co. ,Ltd Report No. ESTE-R2105104 Page 4 of 4 2. Conducted Power Result Mode Frequency (MHz) Peak output power (dBm) Peak output power (mW) Target power (dBm) Antenna gain (dBi) (Linear) GFSK 2402 5.11 3.243 5 ±1 2.3 1.698 2441 4.02 2.523 4 ±1 2.3 1.698 2480 6.37 4.335 6 ±1 2.3 1.698 8-DPSK 2402 3.70 2.344 3 ±1 2.3 1.698 2441 5.44 3.499 5 ±1 2.3 1.698 2480 4.96 3.133 4 ±1 2.3 1.698 BLE 2402 6.12 4.093 6 ±1 2.3 1.698 2440 7.34 5.420 7 ±1 2.3 1.698 2480 7.59 5.741 7 ±1 2.3 1.698 3. Calculated Result and Limit Mode Target power (dBm) Antenna gain Power Density (S) (mW/cm 2 ) Limited of Power Density (S) (mW/cm 2 ) Test Result (dBi) (Linear) 2.4G Band GFSK 7 2.3 1.6980.00169 1 Complies 8-DPSK 6 2.3 1.6980.00134 1 Complies BLE 8 2.3 1.6980.00213 1 Complies End of Test Report

FCC ID: O7VMA120201 EST Technology Co., Ltd Report No. ESTE-R2105103 Page 1 of 74 FCC PART 15C TEST REPORT FOR CERTIFICATION On Behalf of MONITOR AUDIO LTD. Amplifier Model Number: Attessa Streaming Amplifier Additional Model: Attessa Integrated Amplifier FCC ID: O7VMA120201 Prepared for: MONITOR AUDIO LTD. Unit 2, 24 Brook Road Rayleigh, Essex. England SS6 7XJ, United Kingdom Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2105103 Date of Test: Jan. 04~May. 12, 2021 Date of Report: May. 13, 2021 FCC ID: O7VMA120201 EST Technology Co., Ltd Report No. ESTE-R2105103 Page 2 of 74 TABLE OF CONTENTS Description Page TEST REPORT VERIFICATION......................................................................................................................... 3 1. GENERAL INFORMATION ................................................................................................................. 5 1.1. Description of Device (EUT) ........................................................................................................... 5 1.2. Antenna Information ........................................................................................................................ 5 2. SUMMARY OF TEST ......................................................................................................................... 6 2.1. Summary of test result ...................................................................................................................... 6 2.2. Test Facilities ................................................................................................................................... 7 2.3. Measurement uncertainty ................................................................................................................. 8 2.4. Assistant equipment used for test ..................................................................................................... 8 2.5. Block Diagram ................................................................................................................................. 8 2.6. Test Mode ......................................................................................................................................... 9 2.7. Power Setting of Test Software ........................................................................................................ 9 2.8. Duty Cycle ...................................................................................................................................... 10 2.9. Channel List ................................................................................................................................... 11 2.10. Test Equipment List ....................................................................................................................... 12 3. 6DB BANDWIDTH ...................…

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