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2x25W at 4 Ohm TDA7492 Class-D Audio Amplifier Board Only
I'm looking to power this for 15-20 hrs on a sealed lithium battery such as the Tenergy 12.8V 7Ah. Would this be an appropriate battery? Light weight and battery life are of importance. This will be used for a portable setup with car speakers. Thanks!
Could I power this with two 9V batteries?
Technically you could assuming the batteries were in series, although it is not recommended. 9 volt batteries generally have very little current so they would not last very long. A 12V SLA battery would be a better choice but worst case scenario would be 8 high storage AA batteries.
Date published: 2014-05-13
I would like to use this amp in the roof space with 2 ceiling speakers and a Bluetooth adapter so I can play musi using my iPhone. However I need the amp to be in a box to protect it from being a fire risk. Any thoughts on how to do this?
There are plenty of ways to do this, it will be up to how much work you want to put into it. Some people build nice chassis for these with RCA, binding post and power connectors on the outside, while others simply put them in a wooden or metal box and just feed the wires through holes. Some people even leave them completely exposed, which will not hurt anything either as long as they are out of the elements.
Date published: 2014-04-22
can this be used with one 4ohm load safely?
I would not recommend this for a 4 ohm load since the manufacturer only rates it down to 6 ohms.
Date published: 2014-02-04
How would one go about adding tone control to this board?
A pre amp will have to be used in order to add tone controls to this board.
Date published: 2014-01-30
SW1 has two micro switches that came defaulted to both ON. What are these for?
The dip switches are for gain control adjustments. Gain control is accomplished by setting two DIP switches, and there are four gain modes available: 24.6 to 26.6 dB, 30.6 to 32.6 dB, 34.1 to 36.1 dB, and 36.6 to 38.6 dB. There should be directions in the manual for how these should be set.
Date published: 2014-07-15