the blue one with the heat sink from Ebay. i did it, there is no pins or jumpers, the 2 Gain Pins are ending to smd resistors, 333 each one. What should i do? soldering out and shorting it?
Due to space constraints, having monoblocks with separate power supplies are not an option for this particular application. Temporarily, this amp will have to work with a 6 Ohm speakers and 12V 3.3A supply. Which one of these would work best in this scenario?
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Thanks for taking the time to help.
Of course, the 3118, why didn't I think of that. Any thoughts on regular vs D2 version?
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No. Good advice - thank you.
This I will do next time, maybe this provides the wanted effect of additional noise reduction.
Thank you; yes, on page 24/32 of this datasheet I find this so as the fact, that the input resistance through use of an inverted mode is in all cases at least 60K. This means, that the lowest possible input noise is dependend from this resistor.
Nevertheless I want to have the genuine schematic of this amp, because I want to compare all details with the application examples from the TDA7492 datasheet.
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last week I try to do this - but after dismantling the heatsink from PCB unfortunately I note, that both PCB wires - going to the pins 30+31 - are not connected in standart configuration (genuine condition from S.M.S.L.). Means this, that the residual idle noise by shorted input occurs only by the integrated 60K input resistor (go to page 24/32 from the TDA7492 datasheet) ?
If yes, are there successor ICs from ST in the meantime available, where this integrated resistor have lower values with otherwise unchanged properties ?
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Usually to keep (or significantly reduce) RF from getting into the input circuitry.
An externally hosted image should be here but it was not working when we last tested it.
Hi,
Can someone tell me if the snubber circuit is just soldered to the board because at these spots on my board there is nothing?
Hello, i have this amp:
TDA7492 bluetoot 4.0 2*50W
i want to connect this speaker to it:
80w 8ohm
i want to do it in mono, so i can avoid not hearing the other channel in music. How can i do it? Can i mod the amp so it plays only mono? Or join channels to get 1x100w. I think i saw similar TDA7492 amps with mono, but can i mod mine to be similar?
Other solution is to split speaker in channels. Look at the picture. A (4ohm) for right, B(8ohm)+ C(4ohm) for left (with some kind of cap on B). But i dont know how will it work, i am total beginner.
Forcing mono on phone (audio sorce) is not the option.
TDA7492 bluetoot 4.0 2*50W
i want to connect this speaker to it:
80w 8ohm
i want to do it in mono, so i can avoid not hearing the other channel in music. How can i do it? Can i mod the amp so it plays only mono? Or join channels to get 1x100w. I think i saw similar TDA7492 amps with mono, but can i mod mine to be similar?
Other solution is to split speaker in channels. Look at the picture. A (4ohm) for right, B(8ohm)+ C(4ohm) for left (with some kind of cap on B). But i dont know how will it work, i am total beginner.
Forcing mono on phone (audio sorce) is not the option.
Unfortunately, forcing the source to be mono is the best option.
Otherwise, you really need a summing circuit with an opamp.
Or you can use a quick hack of a passive "summing circuit", which is technically not great, but may be acceptable depending on your application. This circuit goes between your source (phone) and the input of the amp.
Otherwise, you really need a summing circuit with an opamp.
Or you can use a quick hack of a passive "summing circuit", which is technically not great, but may be acceptable depending on your application. This circuit goes between your source (phone) and the input of the amp.
Attachments
I dont want to use 80w speaker on one 50w channel. I want to use as much power as possible, to be efficient. Thats why i want to distribute power between both channels.
Is there any other mono 100w bluetooth amp that you can recommend, but not more expensive than mine, on aliexpress (or ebay from china)?
I will use speaker for outdoor hangouts, drinking with friends, so nothing special. I dont need perfection.
I dont really understand what to do on my amp, can you explain me exactly for my situation. I can buy parts and solder, i know how to do that. But nothing more, i am even worse than a beginner in audio equipment.
Is there any other mono 100w bluetooth amp that you can recommend, but not more expensive than mine, on aliexpress (or ebay from china)?
I will use speaker for outdoor hangouts, drinking with friends, so nothing special. I dont need perfection.
I dont really understand what to do on my amp, can you explain me exactly for my situation. I can buy parts and solder, i know how to do that. But nothing more, i am even worse than a beginner in audio equipment.
Making the the play mono is the biggest task here.
My guess is that the speaker in the pic has a built in crossover.
Maybe only a cap in series to the tweeter.
But some kind of crossover will be there if it is in its original state.
I would buy another amp.
Even a seperated bluetooth module and a mono amp board will be easier to handle.
What is the nominal impedance of the speaker?
My guess is that the speaker in the pic has a built in crossover.
Maybe only a cap in series to the tweeter.
But some kind of crossover will be there if it is in its original state.
I would buy another amp.
Even a seperated bluetooth module and a mono amp board will be easier to handle.
What is the nominal impedance of the speaker?
I am thinking about sealed lead battery, 12v 2.3Ah. It can fit inside speaker box.
Be aware that you will never get high power out of 12V, unless you use an step up converter, which sucks you battery empty much faster.
At 25w your battery will be empty after 1 hour.
\footnote{There is much more to explain, but that is not what you should take care of right now.}
The key for a loud outdoor system is a high efficiency speaker.
The speaker in the pic is maybe somewhere between 80db and 85db, which is very low.
For now you should try what you have and make your own experiences.
Keep in mind that this is amp is made for 8 Ohm on each channel.
You can try all of the speakers in parallel (the tweeter with a series cap) on a TPA3118 mono board.
At 25w your battery will be empty after 1 hour.
\footnote{There is much more to explain, but that is not what you should take care of right now.}
The key for a loud outdoor system is a high efficiency speaker.
The speaker in the pic is maybe somewhere between 80db and 85db, which is very low.
For now you should try what you have and make your own experiences.
Keep in mind that this is amp is made for 8 Ohm on each channel.
You can try all of the speakers in parallel (the tweeter with a series cap) on a TPA3118 mono board.
You can try that amp with the speakers configured as you described (woofer+tweeter on one channel, one woofer on the other channel):
https://www.aliexpress.com/item/TPA...lgo_pvid=c25b9159-8d48-4c1a-a637-7ed13eea0a2b
https://www.aliexpress.com/item/TPA...lgo_pvid=c25b9159-8d48-4c1a-a637-7ed13eea0a2b