New to Amp boards here and need some suggestions and help!
Plan on building a 2.1 speaker setup, and have got some requirements on mind for the amp:
1- has > 70w x 2 channels
2- has >= 100w subwoofer channel
3- has Bluetooth module
Found https://www.amazon.com/AOSHIKE-DC12V-24V-Subwoofer-Amplifier-Bluetooth/dp/B07BKYL3GC/ref=sr_1_5?dchild=1&keywords=tpa3116+amp&qid=1629042633&sr=8-5 which satisfies 2,3 but its only 50w per channel.
Couldn't find any "Cheap" boards that satisfy all 3 requirements that I have.
Can I use one of this in conjunction with one of that for the ultimate 2x100 + 100w? How would I go about connection both amps to work as one single unit?
Thanks in advance!
Plan on building a 2.1 speaker setup, and have got some requirements on mind for the amp:
1- has > 70w x 2 channels
2- has >= 100w subwoofer channel
3- has Bluetooth module
Found https://www.amazon.com/AOSHIKE-DC12V-24V-Subwoofer-Amplifier-Bluetooth/dp/B07BKYL3GC/ref=sr_1_5?dchild=1&keywords=tpa3116+amp&qid=1629042633&sr=8-5 which satisfies 2,3 but its only 50w per channel.
Couldn't find any "Cheap" boards that satisfy all 3 requirements that I have.
Can I use one of this in conjunction with one of that for the ultimate 2x100 + 100w? How would I go about connection both amps to work as one single unit?
Thanks in advance!
hi
Cheap? Can you give a budget so we can estimate
answering to your questions
1) use TDA7498 module (100W + 100W)
2) use TDA8950 module in BTL(bridge mode) 250W
3) search around for any DIY mp3 bluetooth module ... and make sure you use an external 5V (separate 5V secondary transformer winding) or better yet a small transformer with 9V secondary ... Rectify it to DC and regulate it to 5V using 7805 regulator. If you use or attempt to tap the bluetooth for the power supply from the amplifier voltage supply lines it will be too high voltage ... even if managed it will be noisy and the bluetooth range will be badly affected
Cheap? Can you give a budget so we can estimate
answering to your questions
1) use TDA7498 module (100W + 100W)
2) use TDA8950 module in BTL(bridge mode) 250W
3) search around for any DIY mp3 bluetooth module ... and make sure you use an external 5V (separate 5V secondary transformer winding) or better yet a small transformer with 9V secondary ... Rectify it to DC and regulate it to 5V using 7805 regulator. If you use or attempt to tap the bluetooth for the power supply from the amplifier voltage supply lines it will be too high voltage ... even if managed it will be noisy and the bluetooth range will be badly affected
Thats a great idea, haven't found any TDA8950 module, maybe I can use two TDA7498 instead? 100W + 100W and another in BTL?
Do you have a diagram about how the wiring go for everything? I have searched some but can't get the full picture yet!
TDA8950 modules were everywhere especially online for sale ... they can be easily found at any online shopping websites even i am from malaysia could purchase them easily. I dont really recommend less than 100W for subwoofer duty as in times you might find that actually you will need a hefty power amp to properly equalize a subwoofer especially sealed box ... it is best you invest a higher power subwoofer channel later you will find that how useful it is. The diagram of connection i will pass it up later when complete drawn
For some reason I cannot find many results for the TDA8950 module unfortunately. What would be the benefit of using TDA8950 instead of Dual TDA7498 (one in BTL since its supposedly supported which can output 150w+ in mono? *36V 3ohm for mono 220W output* taken from the datasheet).
Thanks in advance!
Thanks in advance!
TDA8950 when bridged it gives much higher output than the others which is a good thing ... it even supports bridged load of 4ohms which is good news .. very stable amplifier design .... Ah i just realized that TDA8950 was upgraded and replaced by TDA8954 ... almost same circuit but with even higher output
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There are many options but if you want an all in one package google "tpa3255 2.1 amplifier bluetooth".
Most of these amps don´t have switch for bluetooth as it seems, so it switches automatically to BT. Don´t know how well that works.
I have an amp from Aiyima which I like but there are other manufacturers.
At 48V supply voltage it should give you more than enough power.
The heatsinks in those amps are tiny though and don´t expect to do sinewave-testing at >100W for long periods. The amp will eventually switch off.
For music it will be fine though.
Most of these amps don´t have switch for bluetooth as it seems, so it switches automatically to BT. Don´t know how well that works.
I have an amp from Aiyima which I like but there are other manufacturers.
At 48V supply voltage it should give you more than enough power.
The heatsinks in those amps are tiny though and don´t expect to do sinewave-testing at >100W for long periods. The amp will eventually switch off.
For music it will be fine though.
Found a couple of TPA3255 2.1 Amplifier bluetooth boards but they're so much more expensive than the average TPA3255 boards ($90+)
Thats nice, how would the TDA8954 compare to TPA3255?
Many TDA8950 have the same error, which is a rattling sound. The overall sound was very good, but the rattling sound too annoying. Remember most 100 watt you see on eBay etc is measured at 10 % distortion. A good real 100 watt requires a solid PSU, which will be rather expensive.
This is a great mono card. You can pair two in dual mono configuration and you will get all the power you need:
TPA3255 1x480W 1Ch Class D Audio Amplifier|Amplifier| - AliExpress
To be powered at 48V with SMPS power supply
If this type of configuration is enough for you there is also the stereo one:
TPA3255 2x260W 2Ch Class D Audio Amplifier|Amplifier| - AliExpress
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well, you get what you pay for and i´d consider it still very cheap.
i personally would get a board from 3e-audio or other known manufacturers with enough good reviews.
have a look at the TPA3255 thread with lots of recommendations for boards that work well.
Or this one is quite cheap:
Shui Yuan Audio TPA3255 Modification Thread
But then you have to buy more than one module for your purpose and a separate BT-module eventually.
Do you really need that much power?
I believe the Zoudio board can be used for a 2.1 setup and you have the option to set your crossover, correct for room response, EQ etc.
It has less power though.
Should be OK for home use with a 4Ohm subwoofer.
ZOUDIO electronics
Lowering the supply voltage to 36V sounds better. Consider this power supply:
300W 36V 8.5A Quasi Resonant Power Supply for TPA3251 and TPA3255|Amplifier| - AliExpress
300W 36V 8.5A Quasi Resonant Power Supply for TPA3251 and TPA3255|Amplifier| - AliExpress
50W is only 3dB quieter than 100W. What speakers do you want to use? Nothing's wrong wanting 100W though, but the TPA3130 can reach the 100W only at 2 Ohm PBTL, which translates to 50W at 4 Ohm. Maybe that helps finding a matching amp for you.
Well, some of the BT amps are very annoying because they give acoustical notice on connect, power up or similar and do it with a fixed level. Maybe it's better to use an external BT receiver, that way you could swap it if a new BT version comes out you want to use. Almost all 'BT on board' can't use AptX-HD i.e. I've got the Inateck BR, a tiiiny BT receiver/transmitter which is smaller than a matchbox, got a battery runtime of 10+ h. It's ideal to use it outdoors and on HiFi, excellent sound - but got the serious drawback it beeps at start up (okay, the 1-button multi function feature is annoying too), that's annoying if you have speakers with 102dB/1W and forget to mute the amp before switching it on.
It's probably a lot better to get what you want if you don't expect everything within just one board.
You'd need an external active crossover and you have to modify the BT board to get the audio signal to the 2nd amplifier. Again, you only get the 100W at 2 Ohm.
Excuse my electronics illiteracy but would this not work to run two amps at the same time?
An externally hosted image should be here but it was not working when we last tested it.
The BT amp does not have an output for the other amp. That means, you can't get the audio to the second amp without modifying the BT amp. So no, it won't work.
there is no problem at all ... but it would be better to add a preamp/op amp buffer stage to prevent excessive loading if many modules to be used ... in this case is just fine
That works, and that's what I was suggesting, using an external BT receiver instead of getting an amp with BT on it.