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Class D Switching Power Amplifiers and Power D/A conversion

TPA3255 - all about DIY, Discussion, Design etc.
TPA3255 - all about DIY, Discussion, Design etc.
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Old 7th February 2019, 03:53 PM   #971
DPH is offline DPH  United States
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Join Date: Dec 2008
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I suppose ostensibly is the wrong word. In practice the difference is likely negligible, but I'd say that wiring and driving each woofer independently is a technically superior solution.
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Happy DIYing, Daniel
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Old 7th February 2019, 11:59 PM   #972
hombre is offline hombre  United States
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BTL it is then!
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Old 10th February 2019, 05:00 PM   #973
pmontelo is offline pmontelo  United States
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Default Is this board any good?

I anyone familiar with this board?

tpa3255 dc 50v class d hifi digital audio amplifier board 300w + 300w active components module Sale - Banggood.com|Shopping USA

The price is great. What problems does this board have over the EVM board?

Thanks
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Old 10th February 2019, 05:49 PM   #974
chermann is offline chermann  Austria
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Quote:
Originally Posted by pmontelo View Post
I anyone familiar with this board?

tpa3255 dc 50v class d hifi digital audio amplifier board 300w + 300w active components module Sale - Banggood.com|Shopping USA

The price is great. What problems does this board have over the EVM board?

Thanks



read it.......i know this board partly
What is wrong with TPA3255?


its a smal version of the tpa3255...you will not get the same power as an EVM board because the implementation is not the same...heatsink...regulator(LM2575T...etc..) some boards are not best quality...but its sound nice after moddding....

chris
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Old 14th February 2019, 07:33 PM   #975
AnatoliyHill is offline AnatoliyHill
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Join Date: Feb 2019
Location: Ukraine
Default Out of box tpa3255 BT AYAMA

Hi, mates. It is my pleasure to make step in Damps . I got board tpa3116 with HP power adaptor 18v/3,5A from AliExpress and that was starting point to DAmps I was very sceptical before. Having these tpa3116 for a while got tpa3255 from same source with 48v/20A power industrial adaptor . I am feeding b&w rock solid speakets. 8homm/150w it sound just fine. The only reason i am confused that tpa3255 sounds not much louder than tpa3116 on same speakers. Tpa 3255 sounds much deeper more bass but not significant difference in loudness. Any ideas why?
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Old 15th February 2019, 09:32 AM   #976
chermann is offline chermann  Austria
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Join Date: Jan 2017
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Quote:
Originally Posted by AnatoliyHill View Post
Hi, mates. It is my pleasure to make step in Damps . I got board tpa3116 with HP power adaptor 18v/3,5A from AliExpress and that was starting point to DAmps I was very sceptical before. Having these tpa3116 for a while got tpa3255 from same source with 48v/20A power industrial adaptor . I am feeding b&w rock solid speakets. 8homm/150w it sound just fine. The only reason i am confused that tpa3255 sounds not much louder than tpa3116 on same speakers. Tpa 3255 sounds much deeper more bass but not significant difference in loudness. Any ideas why?

Hi
the gain of the chinese YJ tpa3255 boards is about 27dB. As i read about the tpa3116 some boards have a gain of 30dB.


3db louder could be the result what you hear...


chris
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Old 15th February 2019, 09:37 AM   #977
hansueli is offline hansueli  Switzerland
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Join Date: Oct 2017
Is a big difference (Sound and built quality) betweent the chinese TPA3255 amp board and IRS2092 IRAUDAM7 board also from china?


I have two IRAUDAMP7 and some TPA3116 and also have a TAS5611 but I am not sure for buying one TPA3255.




Same issue on TAS5611, much lower gain comparet to the TPA3116
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Old 15th February 2019, 07:04 PM   #978
multisync is offline multisync  Canada
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Location: Carp
Make sure your source can output 2 volts rms and your power supply is 48vdc and can maintain that level when playing loud. You should then be able to drive the tpa3255 well into clipping and beyond full power. Remember that your ears are not linear but more logarithmic. An old rule of thumb is for something to sound twice as loud you need 10x the power. Similarly for something to sound 1/2 as loud you need 1tenth power. We can easily hear a few thousanths of a watt.
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Old Yesterday, 01:11 PM   #979
AnatoliyHill is offline AnatoliyHill
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Join Date: Feb 2019
Location: Ukraine
Thanks, mates. Will try to feed tpa3255 via notebook fue higher output voltage. Feeding via iphone & blutoth or ipad direct earphone output makes no significant loudness increase. I am still wondering how these D amps are playing even on max level without distortion and keep cold, feeling like they have a lot reserves in power.
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Old Yesterday, 01:18 PM   #980
AnatoliyHill is offline AnatoliyHill
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Join Date: Feb 2019
Location: Ukraine
Here is lot description i got tpa3255 Online Shop AIYIMA TPA3255 Bluetooth 4.2 Audio Amplifier 300W*2 HIFI Class D 2.0 Channel Digital Amplifier Sound System Speaker Home Theater | Aliexpress Mobile. Not sure about gain listed there. Gone plug in notebook.
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