Can you give me a help choosing the speaker protection?
I'm tempted to buy one of this speaker protections on the picture bellow.
Can you helping me to choose one?
Attachments
Last edited:
I share a new picture of one more speaker protection but on that i can plug DC voltage. I don't see on the description if this support BTL for my amp.
Can you give me a little help?
The third speaker protection i know it's more powerfull and have a power supply built on there but its more expensive.
Sorry for all this question, and many many thanks for your time helping me my dear minek.
Attachments
The board from the last photo is not good. Kind of the same what you have. No isolation.
At the #3 photo (expensive board) I recommended originally,
you can see 4 opto-isolators in the right-bottom corner of the board.
That's what you need for BTL/Bridged amp.
Last edited:
I'm looking for speaker protection with opto-isolators as you say and i find this module on eBay, much less expensive, work with DC and AC voltage and for i can understand the negatives (-) of the three channels are independent of each other, suitable for non-common ground and BTL circuit amplifiers, it's ok buying this my dear minek?
It's can be work together my amplifier TDA7498E?
Infos of this module:
Discrete Digital Amplifier Speaker Protection Board Three Channels DC/AC 12V-16V | eBay
Attachments
Last edited:
Can i plug this module (3 channel) with DC voltage from my buck converter?
This module (3 channel) id good enough for working together with my amp?
Other question, if my speaker protection i already buy is common ground, how can i put this working with only one speaker, it's possible?
Can you explain me how can i put my speaker protection module working with only one speaker?
Sorry for all this question my dear minek.
Best regards and good health for you.
Last edited:
Hi again my dear minek.
I have four options for buy a new speaker protection module.
I will put all this options and if you can give me your knowledge for i can buy the most suitable module for my amp, ok?
Modules:
This first module if i understand os common ground in left and right channel but i can use the sub channel to hook one of my speakers because is ground is independent, right?
1: UPC1237 2.1CH 3-Channel Speaker Protection Board with Boot Delay 10A High Power | eBay
2: Discrete Digital Amplifier Speaker Protection Board Three Channels DC/AC 12V-16V | eBay
3: 5A OMRON Relay Speaker Protection Board Module For Digital Amplifier AC 12V~15V | eBay
And the more expensive with power supply built in:
4: 30A Amplifier Speaker Protection Board Module With Power Integrated AC 85V~265V | eBay
What you choose my dear?
Many many thanks for your time my dear minek.
Best regards and good health for you, and for all your family.
Keep safe.
I have four options for buy a new speaker protection module.
I will put all this options and if you can give me your knowledge for i can buy the most suitable module for my amp, ok?
Modules:
This first module if i understand os common ground in left and right channel but i can use the sub channel to hook one of my speakers because is ground is independent, right?
1: UPC1237 2.1CH 3-Channel Speaker Protection Board with Boot Delay 10A High Power | eBay
2: Discrete Digital Amplifier Speaker Protection Board Three Channels DC/AC 12V-16V | eBay
3: 5A OMRON Relay Speaker Protection Board Module For Digital Amplifier AC 12V~15V | eBay
And the more expensive with power supply built in:
4: 30A Amplifier Speaker Protection Board Module With Power Integrated AC 85V~265V | eBay
What you choose my dear?
Many many thanks for your time my dear minek.
Best regards and good health for you, and for all your family.
Keep safe.
Hi my dear minek, i hope you have an nice day.
Can you give me a help choosing one of this speaker protection i share in other post (#90)?
I will wait a answer from you soon as possible.
Best regards and good health for you.
Keep safe.
#1 is not good.
#2 and #3 are very similar. #3 maybe better - it claims it has Omron relays, which is good (but actually unlikely..)
#4 is the best, and easiest to use.
So #2, #3, #4 all three should work for you.
Regards,
I will buy the #2 or the #4.
Other question, it's possible power up the #2 speaker protection with my buck converter? And other think, i read in the thread of TPA3116 on DiyAudio forum, one person saying, it's possible work with the speaker protection i have (common ground) connecting only the (+) from the amplifier to the speaker protection and leave the (GND) alone from the amplifier to the speaker protection. Connect the (GND) directly from the amplifier to the speaker terminal and it will work. It's possible or not?
You can read this on this thread:
Tpa3116 pop/thump when power on/off
If i can use the speaker protection i have with this method, i don't need buy a new one, right?
I hope you can give me a little help my dear minek.
I will wait a answer from you soon as possible.
Best regards and good health for you.
Keep safe.
1) Your buck converter should be ok to power new board.
2) I don't think it's possible to only use (+) from the speaker.
You either have to connect (-) of the speaker to the GND of the board,
or the GND of the amp to the GND of the board.
Both options are not acceptable for bridged amp.
But it's explain this for TPA3116 (BTL) on other thread, why it doesn't work?
How can i work with my speaker protection with only one channel?
If just want to use only one channel, you only connect (+) and (-)
connectors from the output of 1 channel from amp,
to your protection board.
Let's say only LEFT channel.
And you connect 1 speaker (LEFT) to your protection board.
The board will work fine regardless of connecting 1 or 2 channels.
Most likely because of your buck converter.
it's connected to (+) 36V and GND.
Most likely, it's 'non isolating' - which means the same GND from the input of the converter (which is the same GND as the GND of your amp), will be eventually connected to the GND of your protection board, and then it will be connected (shorted) to the (-) of the speaker. GND on your board CONNECTS GND to (-) of speaker. That of course will cause amp to stop working.
You can make an experiment, and try to power your protection board from a battery, or independant PSU,
so the GND of the PSU/battery IS NOT CONNECTED to the GND of your map.
My guess is that your protection board should work (but only for 1 channel).
it's connected to (+) 36V and GND.
Most likely, it's 'non isolating' - which means the same GND from the input of the converter (which is the same GND as the GND of your amp), will be eventually connected to the GND of your protection board, and then it will be connected (shorted) to the (-) of the speaker. GND on your board CONNECTS GND to (-) of speaker. That of course will cause amp to stop working.
You can make an experiment, and try to power your protection board from a battery, or independant PSU,
so the GND of the PSU/battery IS NOT CONNECTED to the GND of your map.
My guess is that your protection board should work (but only for 1 channel).
I only have an laptop charger (19v) for test if this speaker protection work. Can i power up the speaker protection with this laptop charger? With the laptop charger i can plug (+/-) from the amplifier to the speaker protection and the (+/-) from the speaker to the speaker protection? And if this work, can i plug my two speakers in only one channel of the speaker protection? I will consider buy the speaker protection (the most expensive) because already have a power supply built in and the speaker protection don't need to share the same voltage from my amp. I hope this work without any problem. I didn't have to much money to spend my dear minek.
Does anyone know where to buy the uPC1237? It’s a great general purpose solution and not just for power amps - for example you could use it to mute a preamp during power up/ down.
It was originally an NEC chip, but they abandoned it years ago. I think Unisonic (?) in Taiwan do a second source but it seems only tier 3 distributors carry it eg in the UK Cricklewood Electronics in London and its expensive at about £4-50 a pop.
I use a microcontroller now, but it’s not really a good solution for DIY amps that I want to publish - a lot of folks balk at the idea of having to burn a hex file into a micro and unless you are familiar with the process, it can seem quite daunting.
It was originally an NEC chip, but they abandoned it years ago. I think Unisonic (?) in Taiwan do a second source but it seems only tier 3 distributors carry it eg in the UK Cricklewood Electronics in London and its expensive at about £4-50 a pop.
I use a microcontroller now, but it’s not really a good solution for DIY amps that I want to publish - a lot of folks balk at the idea of having to burn a hex file into a micro and unless you are familiar with the process, it can seem quite daunting.