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QUESTIONS & Answers

287 questions

12 May 2021

How will the voltage specification influence a lower voltage.. Looking at a T-Amp capable of putting out 500W @ 3Ohm, but spec says this is accomplished with 50VDC, i wish to set it up to a 24VDC supply, well within the specified range of 15-50VDC.. But if i connect it to 24VDC, how much power will be left? Looking for an amp to power a JBL Stage 1210 5,6Ohm 250W-RMS

Hello.

The output power can be calculated by this formula, P=(U)^2/R, U here refers to RMS.

When the power supply is 24V and the load is 6Ohm, the output power is around 48W in theory.

Due to the power loss, the practical output power may be lower than 48W.

If you want an amplifier to drive the 6Ohm speaker to reach 250W RMS, the power supply needs to be 54V according to the formula.

It would also be okay if you use 50V power supply.

Wish this could help you.

11 May 2021

Hi, is possible to use a rotary switch in place of a potentiometer on jab5. To use as input selector Thanks

Hello.

It's not possible because the I/O ports of ADA1701 has already been used up.

06 May 2021

The jab5 has an minimum load of 6 ohm. Is it possible to connect 4 ohm speakers with a reduced maximum output?

Hi.

Thank you for your interest in our products.

In theory, JAB5 can be used to drive 4Ohm speakers but it will produce more heat.

And it will perform more stably when driving 6Ohm speakers by long time test.

30 Apr 2021

Hi, I have a JAB3M board. Connected 6 Ohm speaker and 1V sinusoidal wave @100Hz I got only 0,7W output power. But in Sigma Studio I can see the output levels pretty high! Any Idea what could be the reason for this low level output? The outputs 2/4 and 1/3 are soldered together. No shortcut between MONO+ and MONO-. Power Supply: Meanwell LRS-100 24V 4,5A.

Hi

Have you ever changed the program of JAB3M?

If yes, could you please send your program to us so that we can see where the problem is?

Please send it to store@sure-electronics.com.

30 Apr 2021

I am searching for bluetooth amp board for a single speaker DIY portable speaker. I am interested in the Wondon 60w x 1 channel amp board and would like to power it with the Wondon 5S battery board for 21V of battery power to the amp. Is the 5 cell (18650) battery board compatible (plug and play) with the Wondon 60w x1amp board. Please let me know either way and thank you for your time! Ed

Hi.

Is the board you mentioned JAB2v2 - 160?

If yes, you can use BCPB3 to power JAB2v2 - 160 through the PH-4Pos connectors.

Wish this could help you.

27 Apr 2021

what additional parts do i need to adjust EQ / DSP with "2 X 30 WATT CLASS D AUDIO AMPLIFIER BOARD W BLUETOOTH VER5.0 & ADAU1701 DSP - JAB3+[760]"

Hi.

Thank you for your interest in our products.

To adjust EQ / DSP of JAB3+, an ICP1 / ICP5 would be required.

With the ICP1, you can program JAB3+ with SigmaStudio.

With the ICP5, besides programming with SigmaStudio, you can remote the audio system with APP / PC UI(Miumax).

ICP5 would be released very soon.

Wish this could help you.

28 Apr 2021

Does the TPA3110 work with 4ohm speakers (with what consequence compared to 8ohm as specified in the specs) and how is the output sound level controlled on the 2 x 15Watt Class D Audio Amplifier Board - TPA3110 ? By the input signal level of the source? I would like to use this amplifier on a earphone output plug on a Apple Mac mini to drive two old iMac G4 speakers with 4ohm and 10Watt each.

Hello.

Thank you for your interest in our products.

You can use 2x15W - TPA3110 to drive 4Ohm speakers.

Due to the current limit circuit, the output power would be around 7.5@16V.

As for the output sound voltage, it would change according to your input signal level.

Taking the gain and load into consideration, it is suggested that the voltage of the input signal do not exceed 270mV when driving 4Ohm speakers.

Wish this could help you.

25 Apr 2021

Salve, è possibile pagare con bonifico?

Hello.

Yes. We can accept bank transfer. Extra US$30 as handling fee would be levied by the bank.

Therefore, it is suggested to pay via Paypal if the total amount is less than US$1000.

If you still want to pay with bank transfer, please contact us with store@sure-electronics.com.

25 Apr 2021

Jab V stopped working

Hi.

Could you please send an email to store@sure-electronics.com to describe the details of the problem?

If possible, please provide some pictures or videos so that we can identify the problem and solve it for you.

We will reply to you as soon as we receive your email.

25 Apr 2021

Hi I have bought a BCPB2 and have inserted 3 LiPO 18650 batteries.....the battery level check shows 4 green LEDs (fully charges in another charger).I measure 12.6Volts over batteries but my output is only 7 volts (between bat- and bat +) What could be the problem?

Hi.

After you install the batteries, you need to connect the battery board with a power supply to activate the battery board.

If there is still problems, please kindly send some pictures or videos to store@sure-electronics.com so that we can identify the problem and solve it for you.

25 Apr 2021

Hello, is it possible to get the schematic for JAB5? I would like to use the GPIOs of the ADAU1701 for other purposes which are used for mono - stereo switching of the power amplifiers. But for this it is necessary to separate the switching of the output stages from the GPIOs of the DSP.

Hello.

Sorry that we cannot provide the schematic of JAB5.

The two GPIOs have been connected to the internal circuit, which cannot be leaded out.

Wish this could help you.

20 Apr 2021

I just want to THANK YOU for the fast answer ! Great customer support !

Thank you for your support. We do appreciate it.

We will be committed to providing you with better service in the future.

If you have any problem, please feel free to contact us.

19 Apr 2021

Hi dear, I also want to use I2s digital signal to ADAU1701 board. Advice me please, Except MCLK which other pins to use for input to 1701 board? Outputs on PCM2706 board are MCLK, DAT, BCK, SCK, GND, 5V. And wahat to re-program in the Sigma Studio? Thanks!

Hi. Please kindly do as follows.

Fist, confirm if your PCM2706 is master mode or slave mode.

1) Master mode

As for MCLK, you need to remove the crystal oscillator on APM2 and connect the MCLK of APM2 with your device.

Then, connect the corresponding positions.

The MP0 of J4 on APM2 is corresponding with DAT.

The MP4 of J4 on APM2 is corresponding with SCK.

The MP5 of J4 on APM2 is corresponding with BCK.

Also connect the GND please.

After connection, please set the program in SigmaStudio as the attached picture shows. Extra attention needs to be paid to the pints in the red boxes.

2) Slave mode

If the device is slave mode, some soldering work would be required and it takes more efforts, we do not suggest customers do that.

The following link is an instruction on how to achieve I2S input with JAB3. You can take it as a reference.

https://store.sure-electronics.com/images/documents/How%20to%20achieve%20I2S%20input%20&%20output%20with%20WONDOM%20JAB3.pdf

Wish this could help you.

15 Apr 2021

Please help me to identify correct firmware files to use MIUMAX on an iphone to control APM2 with ICP3. I have: APM2 AP12311v220 (stickerN1010348 and ICP3 DP41122v100 (sticker L1048051) I am trying to follow the process from youtube https://www.youtube.com/watch?v=TjN1SGKeVvw but cannot figure out what hex file to use for the E2prom - please help with finding correct download

Hi.

The download link firmware file to use MIUMAX for your APM2 is as follows.

https://store.sure-electronics.com/images/documents/APM2_APPCtrl_V2.0.zip

Here is the User Guide of ICP3 for your reference.

https://store.sure-electronics.com/images/documents/WONDOM%20ICP3%20User%20Guide.pdf

We have updated the download link in this document.

Wish this could help you.

16 Apr 2021

how does jab5 work with a 4ohm load and is for pbtl a higher load recommended or same as for single channels

Hi.

The typical load of JAB5 is 6Ohm.

If you use JAB5 to drive 4Ohm speakers, the output power is around 4 x 160W@36V.

The amp chip we used for JAB5 is TDA7498E. You can refer to the chip datasheet for detail information.

The load should be lower when a BTL speaker is configured as PBTL mode.

For example, when JAB5 is used as 2 x 100W, the load is 3Ohm.

Wish this could help you.

16 Apr 2021

Hi, I own an active subwoofer (8ohm 15inch 400W RMS). The integrated amplifier is out of service. Power plug, power button and XLR input are okay. I would like to buy a class D amplifier and a power supply. Can you help me ? Thank you. G.M.

Hi, G.M..

Thank you for your interest in our products.

Considering the output power and load of your speaker, we suggest that you can take a look at our IRS2092 series.

As for the power supply, you can purchase the transformer and rectifier board.

Besides, IRS2092 amplifier boards only supports analog input, so an analog-XLR conversion board would be required.

Wish this could help you.

14 Apr 2021

Hello, I want to syncronize the Standby Mode from JAB3+ with the 2x300W Amp AA-AB32195. How is the Mute pin working from jab3+?(J12, pin3 ) Can I connect it somehow with the Amp AA-AB32195? In the manual, there is J20 defined as Shutdown connector. I cant figure out how to connect. Thanks for your help

Hello.

Thank you for your interest in our products.

The "mute" pin of JAB3+ outputs high voltage level. The "shutdown" pin of AA-AB32195 outputs low voltage level.

If you want to connect them, high-low voltage conversion would be required.

It is suggested to connect JAB3+ with audio amplifier boards whose AMP chip is the same as that of JAB3+.

Wish this could help you.

12 Apr 2021

Regarding the TPA3110 2x8W amplifier board: Are there terminals on the board to connect a volume control? If not, where would one want to place a volume control? In either case, what ohm value potentiometer would be recommended for this amplifier board? Thank you.

Hi.

Thank you for your interest in our product.

There is no terminal interface for volume control on TPA3110 2 x 8 W (AA-AB32231).

If you want to add a potentiometer for volume control, it is suggested to add in front of the input, and the recommended resistance would be 10k - 50kOhm.

Or you can buy our volume control board for use with AA-AB32231.

Wish this could help you.

12 Apr 2021

Why is my JA31182 measuring the same decibels at 12v as it is at 24, with no distortion noted. Bluetooth connection. It's important for full volume to match increased voltage in order to make full use of drivers and batteries. A 100% increase in voltage should deliver a 50% increase in volume.

Hi.

Please note that the gain of AA-JA31182 is a fixed value, which is a closed loop control circuit.

It is when the input voltage of the signal is too high, leading the voltage of the amplified output signal exceeds the power supply rail that the distortion would appear. When the output voltage of the signal is lower than the power supply rail, the output parameters would be the same.

Wish this could help you.

09 Apr 2021

Hi, is it possible to turn off the automatic signal detection for shutdown of the line in at jab5? Alternative is it possible to change the threshold of signal detection? jab5 always shutdown if i listen to the line in and low volume. thx

Hi.

Yes. You can turn off the signal detection function of JAB5 by shorting circuit "+5V" position and "RST" position of J3.

Wish this could help you.

08 Apr 2021

Hi ! Would a JAB5 works correctly if powered by a BCPB3 (with 5x18650 cells) and a boost converter (to get 36V) ? If so, would the BCPB3 allows charging while playing music ? Thanks !

Hi.

The power of 1pc BCPB3 is around 100W, which are not enough for driving JAB5.

It is suggested to connect several BCPB3 in parallel to get higher power. The amount is up to the maximum output power you want. Please do make sure the voltages of these BCPB3 are the same before connection for operation safety.

The output voltage of BCPB3 would not increase even if they are connected in parallel. Therefore, a boost converter is still needed to step up the voltage.

The connected BCPB3s allow charging when playing music. We suggest that connect the charging ports of these BCPB3s in parallel for charge. The maximum charge current of each BCPB3 can be seen as 1.5A. That means, if you connect 2 BCPB3 in parallel, the maximum charge current is around 3A.

Wish this could help you.

06 Apr 2021

Hi, What Bluetooth Module is being used on the JAB5 and what is the pinout of the connector next to it? Can it be used for programming it? Does it support TWS?

Hi.

The Bluetooth module used in JAB5 is Qualcomm QCC3034.

The pin of the connector next to it is used for programming the Bluetooth name.

The pin definition is as follows:

1 ---> +3.3V

2 ---> CLK

3 ---> MISO

4 ---> MOSI

5 ---> GND

Here is the files for your reference: https://1drv.ms/u/s!AlmaMChFeDZovEBOBHp-8ZK41bFB?e=3FoFl8

Please note that a programmer kit would be required. If you want to buy it, we can purchase for you. The price would be US$260.

For now, JAB5 does not support TWS.

Wish this could help you.

02 Apr 2021

Hi, in your previous answers about jab5 schematic, the images are not displaying. You have been very helpful so far. Can you email the images to dustinayling@gmail.com. Thanks

Hi.

We have sent the pictures to you by email.

Please kindly check it.

Any problem, please feel free to contact us.

01 Apr 2021

Jab5 original firmware displays no schematic in sigma studio. Is this correct?

Hi.

You can see the firmware and schematic in the Demo Program of JAB5.

Here is the link for download:

https://store.sure-electronics.com/images/documents/JAB5_ADAU1701_DemoProgram_2021.02.05.zip

When opening the demo program, you will see a "Hardware Configuration" part, which is used to set the audio input. Please kindly set that part the same as what is in the original firmware before programming. You can see the attached picture 1 for reference.

When programming, please kindly set the input (Picture 2) and output (Picture 3) the same as what is shown in the original firmware. You can add functions in the middle by yourself.

We will make a video soon to show you how to program JAB5 and will show you’re the locked part in the demo program.

Wish this could help you.

01 Apr 2021

Hi, it seems that no matter how simple I make my project, always loose Bluetooth function when reprogramming jab5. Restoring firmware gets bt back again but any changes and loose bt functions

Hi.

You can see the firmware and schematic in the Demo Program of JAB5.

Here is the link for download:

https://store.sure-electronics.com/images/documents/JAB5_ADAU1701_DemoProgram_2021.02.05.zip

When opening the demo program, you will see a "Hardware Configuration" part, which is used to set the audio input. Please kindly set that part the same as what is in the original firmware before programming. You can see the attached picture 1 for reference.

When programming, please kindly set the input (Picture 2) and output (Picture 3) the same as what is shown in the original firmware. You can add functions in the middle by yourself.

We will make a video soon to show you how to program JAB5 and will show you’re the locked part in the demo program.

Wish this could help you.

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