2AOAA-AC-25Portable Battery-Operated Acoustic Amp

210.00 mm E E 00 ' 0 £ � AC-25 Portable Battery-Operated Acoustic Amp User Manual FCC WARNING 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. Any changes or modifications not expressly approved by the party『esponsiblefor compliance could void the use「's authority to operate the equipment. 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 ene「gy 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 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. FCC RF exposure statement: T he device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. Int『oduction The NUX AC-25 is a portable battery-operated amplifier optimized for acoustic-electric guitars. It features 2 channels with separate controls, Bluetooth connectivity, onboard tuner and a dedicated tone editing app. Where there is AC-25 there is music. Features • 2 channels with separate controls • Onboard Reverb Effects & Tuner • Up to 4 hours of continuous playing time •Bluetooth Connectivity for audio streaming and tone editing • Well-planed controls & 1/0 Cont『olPanels CHANNEL 1 01 CHANNEL2 COMBO Jack CHANNEL 2 VOLUME Knob BASS Knob MIDDLE Knob TREBLE Knob TUNER Button Dis p lay Q) Q) Q) Q) 0 V口LUME BASS MIDDLE TREBLE TUNER VOLUME Knob SEND Knob REVERB Knob MASTER Knob BLUETOOTH ON/OFFF Switch Button Channel1 INPUT Jack ¼"(6.35mm) INPUT Jack, accept both passive and active acoustic pickups. VOLUME Knob Controls the input signal level for the Channel 1 input. BASS Knob Bass frequency level control. MIDDLE Knob Middle frequency level control. TREBLE Knob Treble frequency level control. TUNER Button Press this button to engage/disengage the built-in tuner. Control Panels D isplay Tuning display. For further information please refer to the TUNER description. Channel2 COMOBO Jack XLR input or 1/4"(6.35mm) instrument input. VOLUME Knob Controls the input signal level for the Channel 2 input. SEND Knob Adjusts the amount of reverb. Global Controls REVERB Knob Sets the overall reverb . MASTER Knob Sets the overall output volume level. 02 Control Panels Rear Panel BLUETOOTH Button Press this button to engage/disengage the built-in Bluetooth function. For further information please refer to the Bluetooth description. POWER indicator Lights on steady when the amplifier is on. ON/OFFF Switch Turn ON/OFF the amplifier. DC-IN Jack *Please turn down the mater volume before you turn on the amp. NU�X AC-2巴 FCC Nm 兰 呈 i DF~NDB-主 iuND 呈 一 TH i 口 之 5 主 MAY 呈 HAT T T ON 巨 三一兰 ANY ONC -i i RF i 等圭 ACC-i ＿髻 MADE IN CHINA CE: 互 ＠ INx 1 u A 霆庄 LIN匾口UT Charge Indicator Low Batt. PHONES Jack Indicator AUX-IN Jack LINE OUT Jack 03 04 Rear Panel DC-IN Jack Plug in the included power supply here to power/charge this amplifier. Use specified power supply only(DC 15V/2.5A Polarity: Negative tip). Charge lndicato『 Lights on steady du『ing the charging process. Lights off automatically when the battery is fully charged. Low Batt. lndicato『 The LED indicator will light on when the battery level is low. For further information, please refer to the BATTERY description. PHONES Jack ¼Composite audio signal output jack. NOTE: The amplifier will be muted when it's plugged in. 05 AUX-IN Jack 1/8 Line level AUX-IN jack. You can connect a CD player, MP3 player, or other device and play back sounds in stereo. LINE OUT Jack You can connect a mixer, recording device, or other such device here. SPEAKER Cover SPEAKER STAND Main Parts SPEAKER Cover You can take off the speaker cover by pulling the ribbon on lower right corner. SPEAKER 6.5" inch full range speaker. + sound hole. STAND You can use the folding stand, just pull it up when needed. 06 Operation Guide TUNER Connections & Examples of using AC-25 二 TUNING MODE F凶TSHARP IN TUNE 1.Press the TUNER button to active the built-in tuner. 2.Adjust tuning peg of each string according to the tuning visuals on the DISPLAY: 3.When finishing up, press the TUNER button again to quite the tuner mode. *The amplifier will be muted when TUNER is engaged. *Tuner ONLY works with CHANNEL 1. BLUETOOTH ® 1.When you power on the amplifier the Bluetooth function will also be turned on automatically by default. You can turn off the Bluetooth function manually by holding down the BULETOOTH button for 2 seconds. 07 2.This green indicator will keep flash indicating the Bluetooth®module is ready for pairing. 3.Go to the Bluetooth setting menu of Bluetooth enabled device, find the device named "NUX AC25", tap to pair. You will hear an cue tone when connection established successfully. BATTERY This amplifier is equipped with rechargeable battery packs. You can use either the built in battery packs or the included power supply to power up the amplifier. The Low Batt. indicator will light on when the battery level is low. At this point, the amplifier cannot be power…

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Cherub Technology Co., Ltd Model difference statement Product Name: Portable Battery-Operated Acoustic Amp Model N o.: AC-25, SA-25 We (Cherub Technology Co., Ltd, Room507, Block 1, Nanhai E-Cool, No. 6 Xinghua Road, Shekou, Nanshan District, Shenzhen City, Guangdong Province, China, 518067) hereby state that all the models are the same circuit and RF module, except the model No. Signature: Name / title: Yanjun Meng Tel: +86 755-26869866 Email: [email protected] Date: 5.8.2021

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Cherub Technology Co., Ltd Address: Room507, Block 1, Nanhai E-Cool, No. 6 Xinghua Road, Shekou, Nanshan District, Shenzhen City, Guangdong Province, China, 518067 Product Name: Portable Battery-Operated Acoustic Amp Model Number: AC-25, SA-25 FCC Identifier: 2AOAA-AC -25 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Yanjun Meng Date: 5/8/2021 Title: Signature of applicant:

C5266091_X10_Ed.1 1/1 Cherub Technology Co., Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 5/8/2021 Subject: Request for Confidentiality FCC ID: 2AOAA-AC-25 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality ID Label/Location No No Attestation Statement No No External Photos No Block Diagram Schematics Test Report No No Test Setup Photos No User’s Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Yanjun Meng Date: 5/8/2021 Title:

1 - Page 1 of 2 - Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] APPENDIX 1- EUT PHOTO Photo 1 (For model AC-25) Photo 2 1 - Page 2 of 2 - Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Photo 3 ----END OF REPORT----

Label Location

1 - Page 1 of 5 - Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] APPENDIX 1- EUT PHOTO Photo 1 (For model AC-25) Photo 2 1 - Page 2 of 5 - Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Photo 3 Photo 4 1 - Page 3 of 5 - Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Photo 5 Photo 6 BT ANT 1 - Page 4 of 5 - Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Photo 7 Photo 8 1 - Page 5 of 5 - Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Photo 9 ----END OF REPORT----

Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] RF EXPOSURE Test Report Report No.: MTi201225011-08E3 Date of issue: Apr. 27, 2021 Applicant: Cherub Technology Co., Ltd Product name: Portable Battery-Operated Acoustic Amp Model(s): AC-25, SA-25 FCC ID: 2AOAA-AC-25 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 6- Report No.: MTi201225011-08E3 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Instructions 1. The report shall not be partially reproduced without the written consent of the laboratory; 2. The test results of this report are only responsible for the samples submitted; 3. This report is invalid without the seal and signature of the laboratory; 4. This report is invalid if transferred, altered or tampered with in any form without authorization; 5. Any objection to this report shall be submitted to the laboratory within 15 days from the date of receipt of the report. - Page 3 of 6- Report No.: MTi201225011-08E3 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] TEST RESULT CERTIFICATION Applicant’s name .................... : Cherub Technology Co., Ltd Address .................................. : Room507, Block 1, Nanhai E-Cool, No. 6 Xinghua Road, Shekou, Nanshan District, Shenzhen City, Guangdong Province, China, 518067 Manufacturer's Name ............. : Cherub Technology Co., Ltd Address .................................. : Room507, Block 1, Nanhai E-Cool, No. 6 Xinghua Road, Shekou, Nanshan District, Shenzhen City, Guangdong Province, China, 518067 Factory’s Name: Cherub Technology Co., Ltd（Zhuhai High-tech Park） Address: No.10, Keji No.9Rd, Tangjiawan Town, Zhuhai National Hi-tech Industrial Development Zone, Zhuhai City, Guangdong Province, China, 519080 Product description Product name ........................... : Portable Battery-Operated Acoustic Amp Trademark ............................. : NUX Model Name .......................... : AC-25 Serial Model ............................ SA-25 Standards ............................... : N/A Test procedure ....................... : KDB 447498 D01 v06 Date of Test Date (s) of performance of tests ............ : Apr. 10, 2021 ~Apr. 27, 2021 Test Result ............................................. : Pass This device described above has been tested by Shenzhen Microtest Co., Ltd. and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. Testing Engineer : (Danny Xu) Technical Manager : (Leo Su) Authorized Signatory : (Tom Xue) - Page 4 of 6- Report No.: MTi201225011-08E3 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Table of Contents 1. STANDALONE SAR TEST EXCLUSION CONSIDERATIONS ............................................................................................ 5 2. SAR TEST EXCLUCSION THRESHOLDS ........................................................................................................................ 6 - Page 5 of 6- Report No.: MTi201225011-08E3 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] 1. Standalone SAR test exclusion considerations Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions. The minimum test separation distance defined in 4.1 f) is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander. To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified, typically in the SAR measurement or SAR analysis report, by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting are required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions. a) For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where  f (GHz) is th…

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Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Test Report Report No.: MTi201225011-08E1 Date of issue: Apr. 27, 2021 Applicant: Cherub Technology Co., Ltd Product name: Portable Battery-Operated Acoustic Amp Model(s): AC-25, SA-25 FCC ID: 2AOAA-AC-25 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 69 - Report No.: MTi201225011-08E1 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Instructions 1. The report shall not be partially reproduced without the written consent of the laboratory; 2. The test results of this report are only responsible for the samples submitted; 3. This report is invalid without the seal and signature of the laboratory; 4. This report is invalid if transferred, altered or tampered with in any form without authorization; 5. Any objection to this report shall be submitted to the laboratory within 15 days from the date of receipt of the report. - Page 3 of 69 - Report No.: MTi201225011-08E1 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Te l : (86-755)88850135 Fax: (86-755) 88850136 Web:www.mtitest.com E-mail: [email protected] Table of Contents 1 GENERAL INFORMATION .......................................................................................................................................... 6 1.1 DESCRIPTION OF EUT ................................................................................................................................................... 6 1.2 OPERATION CHANNEL LIST .............................................................................................................................................. 6 1.3 TEST CHANNEL LIST ....................................................................................................................................................... 7 1.4 ANCILLARY EQUIPMENT LIST ........................................................................................................................................... 7 1.5 DESCRIPTION OF SUPPORT UNITS .................................................................................................................................... 7 2 SUMMARY OF TEST RES U LT S .................................................................................................................................... 8 3 TEST FACILITIES AND ACCREDITATIONS ..................................................................................................................... 9 3.1 TEST LABORATORY ........................................................................................................................................................ 9 3.2 ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 9 3.3 MEASUREMENT UNCERTAINTY ........................................................................................................................................ 9 3.4 TEST SOFTWARE ........................................................................................................................................................... 9 4 EQUIPMENT LIST .................................................................................................................................................... 10 5 TEST R ESULT ........................................................................................................................................................... 11 5.1 ANTENNA REQUIREMENT ............................................................................................................................................. 11 5.1.1 Standard requirement ....................................................................................................................................... 11 5.1.2 EUT antenna ..................................................................................................................................................... 11 5.2 PEAK OUTPUT POWER ................................................................................................................................................. 12 5.2.1 Limit .................................................................................................................................................................. 12 5.2.2 Te st setup .......................................................................................................................................................... 12 5.2.3 Test procedure ................................................................................................................................................... 12 5.2.4 Test results......................................................................................................................................................... 12 5.3 CONDUCTED EMISSION ................................................................................................................................................ 19 5.3.1 Limits ................................................................................................................................................................. 19 5.3.2 Test setup .......................................................................................................................................................... 19 5.3.3 Test procedure ............................................................................................................................................…

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Model: AC-25 Radiated emission Conducted emission