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2x15W at 4 Ohm TA2024 Class-D Audio Amplifier Board
What is the best way to get this amp to run off a battery? What size do I need?
The amp is rated to run off 8.2V-12V so there are lots of combinations of batteries that will power it. AA's are 1.5 Volts so you would need 8 of them. I built a little boom box using this amp and am powering it with a 9.6 Volt RC Car battery. It's rechargeable, has 1600mAh and gives me plenty of power out of the amp. I haven't measured exactly how long it lasts but I always have it at pretty much full volume and it runs all day when I'm out fishing and/or kayaking. I used an OtterBox and a Bluetooth receiver so its completely sealed. my iPhone stays in a separate Otterbox, so even if the boombox is compromised, my precious phone is safe. Speakers are the Dayton ND65-4 2.5" full range drivers.
Date published: 2012-01-23
Am I missing something obvious? Where is the volume control? Are there pads on the board to connect a potentiometer to?
For a volume control with this amp board you have a few options.1. Use a source with built-in volume control, such as an MP3 player.2. Wire a potentiometer or a passive pre-amp. The most basic option would be a potentiometer, but there are excellent passive pre-amp designs that alter the basic potentiometer design slightly, such as the Rod Elliot or Harry Haller designs. I prefer the Harry Haller, which can be found on diyAudio forums. Rod Elliot's page has good information about how to choose a potentiometer. For most users, a dual-gang (stereo) log or audio taper potentiometer between 10Kohms and 50Kohms is the best tradeoff.3. Use an active pre-amp. I am assuming this isn't in the cards for you as a good quality active pre-amp will cost about 10 times what this amp board costs.I would think that option 2 would be most relevant for your question. As far as pads to connect the potentiometer to, there are actually screw terminals and RCA jacks, so depending on whether you want to use a potentiometer or external pre-amp, you could use either one. If you have good soldering skills you could desolder the screw terminals and solder the lead wires from the potentiometer.
Date published: 2012-03-04
Building jobsite radio
Thinking about this amp or the 2x8 watt for a jobsite radio. I have Ridgid 18V, 2.4Ah batteries and Milwaukee 12V, 1.3Ah batteries that I would like to use via extra charging docks that I have. I know that the Milwaukee won't run a 4ohm load for long and even with 8ohm it's limited. The Ridgid would be better on run time but bigger. The 2x8 watt isn't listed for 18V operation though. What would you use in this application and do you have any speaker recommendations. Small, full range would be best.
18v battery is fine, just note that their output rms rating is at/around their peak supply voltage stability. You could use the Dayton Audio full-range 6.5" mids in a dipole configuration for some amazing results. Their sensitivity and bandwidth is the reason for my recommendation. Dayton pulled off a relatively amazing driver this time.
Date published: 2011-10-16
can you connect the inputs together and then also the output to make a mono with 2 x the power?
As far as I know, Tripath TA2024 chips are not bridgeable to mono. So to answer your question: No, you can't connect the outputs together to get double the power.
Date published: 2011-12-06
TA2024 power supply voltage up to 14.4v, ok in a car?
Is this board going to survive DC voltage up to 14.4v in a an automotive installation? I want to keep the majic smoke inside that cute little tripath chip, and can't find anyone who attempted to run this amp in a car, with alternator boosted voltage. It is rated up to 14v in the specs, and the TA2024 chip is rated to 16v. But what else on the board could release the smoke at ove 12 volts?
dc current in car electronic may have alternator whine and need filtering
Date published: 2012-01-13
is the wattage rms or peak?
Date published: 2012-04-16