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Class D Switching Power Amplifiers and Power D/A conversion

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Old 14th March 2020, 10:08 AM   #1
digitaled is offline digitaled
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Default Need your expert advice

While searching for low power car amps I found this one and since I did not find any review video of this one.

I was wondering if anyone could give there opinon on this amp as the seller claims that it has exceptional sound.

AZDOME X9 Plus DSP Amplifier Bluetooth 5.1 channel 31 band EQ tuning audio processing amplifier stereo subwoofers car audio|Multichannel Amplifiers| | - AliExpress
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Old 14th March 2020, 12:32 PM   #2
digitaled is offline digitaled
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Default Pics of azdome amp

Here are some pics of the amp
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Old 14th March 2020, 02:31 PM   #3
Reactance is offline Reactance  South Africa
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Quote:
Originally Posted by digitaled View Post
Here are some pics of the amp
nonsense product with a DSP front end.
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There’s nothing worse than the smell of burned output transistors!!
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Old 14th March 2020, 07:13 PM   #4
Mark Tillotson is offline Mark Tillotson
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TDA7851 gives about 15W per channel into 4 channels from what I can see. Where the
6 channels or the "4 x 80W" figures come from is anybody's guess.


Why have you posted this on the class D forum?
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Old 15th March 2020, 03:24 PM   #5
digitaled is offline digitaled
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Oops just realized its not a Class D Amp and apologize for this.

Reading your feedback on this I guess it's better to stay away however there marketing method is really hypnotizing..
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Old 17th March 2020, 03:42 PM   #6
Douglas Blake is offline Douglas Blake  Canada
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Quote:
Originally Posted by Mark Tillotson View Post
TDA7851 gives about 15W per channel into 4 channels from what I can see. Where the
6 channels or the "4 x 80W" figures come from is anybody's guess.
Oh my ... that's simple, Mark ... they lie.
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Old 17th March 2020, 07:40 PM   #7
Turbowatch2 is online now Turbowatch2  Germany
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They lie just a little, the TDA7851 can deliver 78 Watt/ 2 Ohm with 100% THD.

This is pretty honest, as they could also quote 500 Watt / 0,2 Ohm / for 0,001 Sec.
Off course, this power can only be delivered once, while the chip blows up.
Which is what we usually call PMPO...
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Old 17th March 2020, 07:57 PM   #8
chermann is offline chermann  Austria
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