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Old 2nd May 2015, 02:01 AM   #1
ton def is offline ton def  United States
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Default Power supply voltage max for china amp

TPA3116 2 1 Bluetooth Input Analog Input Amplifier Board 100W 50WX2 YJ | eBay I have this amp and would like some input on what would be a good power supply for it. I have a 28vdc switched power supply already. But this amp is rated for 24 v max. Would this work or is this asking for smoke ? If I can't use it, what would be good ? thanks

Last edited by ton def; 2nd May 2015 at 02:25 AM.
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Old 2nd May 2015, 03:45 AM   #2
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Get a 24V supply, or regulate the 28V down. A 28V supply is sure to let the smoke out.
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Old 2nd May 2015, 04:53 AM   #3
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The TPA3116 has overvoltage protection that shuts it down when supply voltage hits 26V so even if there's no smoke from other parts it will never even start up with 28V supply voltage. I know the TPA3116 thread is quite long so I understand why people are hesitant to jump over there but the general consensus is that the chip prefers a supply voltage of about 19V-21V to perform its best. SQ quickly drops at higher voltages. So get yourself a 20V supply.

Last edited by Saturnus; 2nd May 2015 at 05:11 AM.
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Old 2nd May 2015, 08:32 PM   #4
ton def is offline ton def  United States
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Yeah, I just saw the long thread. Well for now I will just power up with a 19.5 v laptop brick.
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Old 9th May 2015, 01:54 AM   #5
ton def is offline ton def  United States
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Default Listening impressions

Hooked the amp up to a 19.5 v 130w laptop power brick. I used the 3.5mm line to my computer. I listened to Pandora and you tube. First thought,this does not seem like a 50wpc rms amp.More like about 20 wpc. The mids and highs are great,I mean they are clean and bright. But, there is a definite lack of low bass. For a comparison, my Dayton T-amp plays much louder with alot more low end bass. Which leads me to wonder if this is configured with a small speaker ,large speaker switch internally.
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Old 9th May 2015, 07:08 AM   #6
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It's probably the input sensitivity that is much lower. Is there a difference between bluetooth and line source?
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