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TDA7492 Digital Audio Amplifier Board 2x50W
I am unable to get very much gain out of this. Using 18.5V and a traditional 50K pot on the input side. It's plays clean but Sounds much less than one watt on the output. Same behavior on both channels. How can I troubleshoot? Thx Ron
Turns out I need around 600k to avoid impact to the input signal. The output is now similar to using no pot at all. Output is nice and clean and I'm able to get full power out!
Date published: 2015-12-29
So is there a secret to getting these to work?? I have two of them and neither produce any output at all. Hooked up per the wiring diagram using a bench supply set to 18V and a pair of small 8 ohm 2-way speakers I use for amp testing.
I got one of the modules to work. I found the speaker connection blocks each had one bad solder connection. Almost like maybe I rotated the blue plastic block a little bit tightening the screws and this caused the solder connection to break. Anyway resoldering the speaker connections fixed one module.The other is still DOA. Going to see if I can find out why - will post any results.
Date published: 2015-10-30
Have a 27v 2.4Amp power supply. Would that exceed the powers required by this board? Will it work or will it damage it?
Going by the manufactures specs 27V will be too much for this amplifier and I can not recommend going above 26V.
Date published: 2015-07-22
Basic wiring question; I get a full-volume buzz from my speakers until I have the input plugged into my 3.5 jack. Is there a way around this? Also wired a 500k pot (had it on hand) and get the buzz until the volume is about half way up.
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Date published: 2015-07-24
How would you go about using RCA cables as inputs? What parts would I need and how would I wire it? I don't see any switches - how is volume controlled and the board turned on? If it's receiving power, it's on?
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Date published: 2015-06-25
Will this run good on a 12 volt power supply? Also I am looking for something like this that has Bluetooth built in? What do you have that will work for a volume control nob with on off built in?
Regarding voltage supply, I would use a p/n 320-6546 to step up the 12v supply to a more appropriate voltage based on your impedance load (see product description above for voltages). I've used that voltage converter to step up to 24v from a 12v SLA battery and power a Lepai p/n 310-298 amp (with built in bluetooth), and it works great.
Date published: 2015-06-03