2A9KA-G0PROGUITAR PICKUP

POWER 开关 指示灯 INDICATOR G0 PRO Guitar Preamplifier User Guide Thank you for choosing DOUBLE G0 PRO series acous�c guitar preamplifier, it's a great preamplifier. Double's acous�c engineers have set up various audio algorithms for several playing styles, so you can just choose the style you want to play and get a great sound without having to adjust your EQ parameters. The pickup also have various DSP effects, including compression, reverbera�on, chorus and delay. In addi�on, the system also supports ac�ve recording, wireless output, BT audio, it is a magical preamp. 感谢您选择DOUBLE G0 PRO吉他拾音器，它是一款出色的拾音器。德博的声学工程师已经针对 几个常见演奏风格设置了不同的音效，你只需要选择想要的演奏风格，便能得到很好的音效，无 须进行EQ参数调整。拾音器还设置多种常用的DSP音效，您同样可以随意选择。另外，拾音器 还有支持内录、无线传输等功能，是一款真正的高科技神器。 In order to get the most out of your new pickup system, we recommend you to read the user guide. 为了让您更好地使用拾音器，建议您详细阅读本说明书。 Features & Controls [ Power SWT ] This bu�on is power switch of system. Long press the bu�on to turn the system on, and the green indicator lamp will light; long press it again, the system will turn off and the indicator goes off. 开关机钮，在不连接音箱的情况下，长按此钮，系统开机进行加振模式，指示灯亮绿色；再长按 此钮，系统则关机，指示灯熄灭。 [ Vol control ] Volume control, pls set the volume rotary as high as possible, without causing distor�on. 音量控制，建议尽量开大音量，不用担心造成失真。 [ Mic. Level ] MIC volume control. If hear the feedback from the amplifier, please stay away from the amplifier, or reduce the MIC volume. 麦克风音量控制钮。如果听到音箱产生啸叫，请远离音箱演奏或者相对减小麦克风的音量。 [ Styles selec�on ] The system sets Fingerstyle, Strummer, Band and Solo playing styles. Press this bu�on to select/switch the playing style, and the system will match the corresponding EQ tone according to your selec�on. 演奏风格选择按钮，系统设置了Fingerstyle指弹、Strummer扫弦、Band伴奏、Solo独奏四种演奏 风格。按此按钮，可以进行演奏风格的选择/切换，系统将根据您的选择自动匹配对应的音色。 [ Effects selec�on ] Effects selec�on bu�on, short press this bu�on to switch between Compression, Reverb, Chorus, and Delay effects. If you want to stack different effects, pls long press the selected effect to lock it (the indicator lights flashes and then come light), and press again to switch to other effects for stacking (note: chorus and delay cannot be used at the same �me). If you want to cancel the selec�on, long press the locked effect once more the effect has been canceled when the effect indicator off. 效果选择按钮，短按该按钮可以在Compression压缩、Reverb混响、Chorus合唱、Delay延时 四种效果切换。如果想叠加不同的效果，可以长按锁定被选效果对其进行锁定（指示灯先闪烁再 长亮），再短按切换到其他的效果进行叠加（注意：合唱和延时不能同时使用）。如果想消取选 择，则再长按一次被锁定的效果，效果指示灯灭表示该效果已取消。 [ Wireless Power ] Wireless on/off switch, short press this bu�on, the indicator light turns blue, meas the wireless transmission mode is on, you can connect the amplifier through the wireless receiver. Press this bu�on again to switch off the wireless transmission and the working light turns back to green. 拾音器无线开关，短按此钮，工作指示灯变为蓝色，表示已经开启了无线传输模式，您就可以通 过无线接收器连接音箱了。再短按一下该钮，无线传输关闭，工作指示灯变回绿色。 [ Channel pairing ] Wireless channel pairing knob for channel pairing between pickup and receiver. The pickups are factory paired with the wireless receiver and can be used directly. If you need to do channel pairing, please long press it for three seconds, the indicator light will flash blue, then turn on the receiver power will automa�cally connect to pairing. Press once to stop the pairing, you will no�ce that the receiver’s indicator POWER: Power switch for transmi�er/receiver, press bu�on for ON or OFF. 启动开关，按下该按键可以启动或关停模块。 Wireless Receiver turns green, indica�ng a successful wireless connec�on. 无线信道配对钮，用于拾音器和无线接收器之间的信道配对。拾音器出厂时已经和无线接收器完 成配对，可以直接使用。如果需要进行信道配对，请长按三秒，指示灯闪烁蓝色，再开启接收器 电源就会自动进行连接配对，再按此键一次关闭配对模式，接收器信道灯这时会亮绿色，表示无 线已经连接成功。 [ Indicator ] A mul�-func�on indicator with different light colors. Indicator turns green when system on (Indicator turns blue if wireless on), turns red means low ba�ery, light off means ba�ery died, please recharge your ba�ery. The indicator will be flashing red when recharging and turns green when fully charged. 一个多种颜色来区分指示功能的指示灯，当系统开始工作时，指示灯亮绿光(无线开启则为蓝光）； 当电压偏低时，指示灯会闪烁红色；当电池没电时，系统进入低压保护状态停止工作，指示灯熄灭 。另外，当您通过TYPE C 插口进行充电时，指示灯亮红色呼吸灯；当电池充满电时，指示灯变为绿 色，表示电池已充满。 [ TYPE C port ] Type C charging socket. When ba�ery low, please connect the charging cable to the mobile phone charger for charging. Some 5V, 0.5A~2A charger is suitable for system charging. Type C 充电插口，当电压偏低时，请用充电线连接到手机充电器进行充电. 普通5伏，0.5安~2 安的充电器广泛适用于本产品的充电。 [ Ac�ve recording jack ] 3.5MM ac�ve recording output jack (4 channels). If you need to record and preserve music, please connect your device with a suitable cable. 43.5MM内录插口(需用4通道插头连接）。如您需要录制和保存音乐，请根据您的录音设备合适 的音频线连接和内录。 INDICATOR: A mul�-func�on indicator with different light colors. When the receiver indicator turns green , it means that the wireless connec�on is successfully paired. If the receiver indicator is yellow, the pairing is not successful. 指示灯兼工作开关指示和信道配对指示之功能。当按下开关，指示灯亮表示进入了工作状态；当 接收器指示灯亮绿灯时，表示无线连接配对成功；接收器指示灯亮黄色，则表示未配对成功。 电量指示灯 BATTERY LEVEL INDICATOR BATTERY LEVEL INDICATOR 电量指示灯 BATTERY LEVEL INDICATOR: When the ba�ery is full, the indicator light is green. If it turns to red means ba�ery is low and need charging. 电量指示灯，当电池电量充沛时，指示灯亮绿色。而且当该灯变成红色的时候，说明电池的电 量偏低，需要给电池进行充电。 Transmission 加振器 Output cable 输出尾钉插座线 Type C port 充电插口 Vol control 音量控制 Styles selection 风格选择 Style indicators 风格指示灯 Power SWT 电源开关 Active recording jack 内录插口 Indicator 工作指示灯 Effect indicators 效果指示灯 Effects selection 效果选择 Channel pairing 无线信道配对 Wireless power 无线开关 MIC. level 麦克风音量 The system comes with comes with a nice wireless receiver for wireless output. You can connect your guitar to amplifier without cable. G0 PRO支持无线传输输出，并配备了一个精美的无线接收器。你可以用无线的方式连接音箱 或舞台设备，让你彻底摆脱连接线的束缚，自由自在地尽情表演。 连接音箱或其他音频处理设备 1/4” Plug, Connect to AMP or audio controller Receiver 无线接收器 INDICATOR 指示灯 POWER 开关 Both of preamp and receiver are powered by built-in polymer lithium ba�eries. They are rechargeable ba�ery with large capacity, long life and stable performance. System is equipped with a Type C cable to charge, please connect to a regular phone charger and charge it . 拾音器和无线接收器分…

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Sincerely, Name/Title： Zhou Zhou /PM Company: HUIZHOU DOUBLE ACOUSTICS CO., LTD. Address: F/16, Bld 2, Xunyang High-Tech Park, Jiangjun Rd, Qiuchang Town, Huiyang District, Huizhou City, Guangdong China Phone: 18823709181 Fax: N/A E-Mail: [email protected]

FCC ID: 2A9KA-G0PRO External Photos of the EUT TX RX FCC ID: 2A9KA-G0PRO FCC ID: 2A9KA-G0PRO

Label and Location Size: L: 1.0cm*W: 0.5cm Label and Location FCC ID : 2A9KA-G0PRO

FCC ID: 2A9KA-G0PRO Internal Photos of the EUT FCC ID: 2A9KA-G0PRO Antenna FCC ID: 2A9KA-G0PRO

RF Exposure evaluation FCC ID: 2A9KA-G0PRO 1.1. Applicable Standard According to §1.1307(b)(1), 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 of the Commission’s guidelines. According to §1.1310 and §2.1093 RF exposure requirement KDB447498 v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 1.2. Requirement According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 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, listed below, is 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.22 The minimum test separation distance 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 (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the 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; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.23 “ [(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 the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation • The result is rounded to one decimal place for comparison • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to 5) in section 4.1 is applied to determine SAR test exclusion. 1.3. Manufacturing tolerance FM (Peak) Channel Channel 01 Channel 02 Channel 03 Target (dBm) 8.5 8.5 8.0 Tolerance ±(dB) 1.0 1.0 1.0 Page 2 of 2 2. E v a l u a t i o n R e s u l t Evaluation Results Band/Mode f (GHz) Antenna Distance (mm) RF output power (including tune-up tolerance) SAR Test Exclusion Threshold SAR Test Exclusion dBm mW FM 0.658 5 9.5 8.9125 1.4459 <3.0 Yes 3. C o n c l u s i o n The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 v06 .....................End of Report.........................

1. Antenna Description: Antenna type Internal ANT Model G0 Pro G0 Frequency range 658MHz-662MHz Manufacturer HUIZHOU DOUBLE ACOUSTICS CO., LTD. Antenna gain: 0.00 dBi 2. Antenna Photo: Length:86.55mm Diameter2.06mm L

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART CTEST REPORT FCC PART 15.236 Report Reference No. ..................... : FCC ID. .............................................: CTA22112800401 2A9KA-G0PRO Compiled by ( position+printedname+signature) ... : File administrators Kevin Liu Supervised by (position+printedname+signature) .... : Project Engineer Kevin Liu Approved by (position+printedname+signature) .... : RF Manager Eric Wang Date of issue ..................................... : Dec. 27, 2022 Testing Laboratory Name .............: Shenzhen CTA Testing Technology Co., Ltd. Address ............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Applicant’s name ............................ : HUIZHOU DOUBLE ACOUSTICS CO., LTD. Address ............................................ : F/16, Bld 2, Xunyang High-Tech Park, Jiangjun Rd, Qiuchang Town, Huiyang District, Huizhou City, Guangdong, China Test specification ...........................: Standard ........................................... : FCC Part 15.236 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : GUITAR PICKUP Trade Mark ....................................... : X2 DOUBLE Manufacturer .................................... : HUIZHOU DOUBLE ACOUSTICS CO., LTD. Model/Type reference....................... : G0 Pro G0 Listed Models ................................... : G1, G2, SMART 1, SMART 2 Modulation Type ............................... : FM Operation Frequency ........................ : 658.80MHz-661.80MHz Rating ............................................... : DC 3.7V From Battery and DC 5V From external circuit Result................................................ : PASS Report No.: CTA22112800401 Page 2 of 29 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : GUITAR PICKUP Model /Type : G0 Pro G0 Series Model : G1, G2, SMART 1, SMART 2 Model Declaration : PCB board, structure and internal of these model(s) are the same,So no additional models were tested. Applicant : HUIZHOU DOUBLE ACOUSTICS CO., LTD. Address : F/16, Bld 2, Xunyang High-Tech Park, Jiangjun Rd, Qiuchang Town, Huiyang District, Huizhou City, Guangdong, China Manufacturer : HUIZHOU DOUBLE ACOUSTICS CO., LTD. Address : F/16, Bld 2, Xunyang High-Tech Park, Jiangjun Rd, Qiuchang Town, Huiyang District, Huizhou City, Guangdong, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory Report No.: CTA22112800401 Page 3 of 29 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 T E S T S T A N D A R D S .................................................................. 4 2 S U M M A R Y ............................................................................. 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Equipment Under Test 5 2.4 Short description of the Equipment under Test (EUT) 5 2.5 EUT operation mode 6 2.6 Block Diagram of Test Setup 6 2.7 Related Submittal(s) / Grant (s) 6 2.8 Modifications 6 3 T E S T E N V I R O N M E N T ............................................................... 7 3.1 Address of the test laboratory 7 3.2 Test Facility 7 3.3 Environmental conditions 7 3.4 Summary of measurement results 7 3.5 Statement of the measurement uncertainty 8 3.6 Equipments Used during the Test 9 4 T E S T C O N D I T I O N S A N D R E S U L T S ............................................ 10 4.1 AC Power Conducted Emission 10 4.2 Maximum Output Power 13 4.3 Occupied Bandwidth 15 4.4 Necessary Bandwidth 17 4.5 Transmitter spurious emissions 19 4.6 Frequency Stability 21 5 T E S T S E T U P P H O T O S O F T H E E U T .......................................... 23 6 P H O T O S O F T H E E U T ............................................................. 24 Report No.: CTA22112800401 Page 4 of 29 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 1 T E S T S T A N D A R D S The tests were performed according to following standards: FCC Rules Part 15.236: Operation of wireless GUITAR PICKUPs in the bands 54-72 MHz, 76-88 MHz, 174- 216 MHz, 470-608 MHz and 614-698 MHz. ANSI C63.10-2013:AmericanNationalStandardforTestingUnlicensedWirelessDevices Report No.: CTA22112800401 Page 5 of 29 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 2 S U M M A R Y 2.1 Ge…

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FCC ID: 2A9KA-G0PRO Test Setup Photos of the EUT