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Class D Switching Power Amplifiers and Power D/A conversion

2.1 class d amp with subwoofer output for solar setup
2.1 class d amp with subwoofer output for solar setup
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Old 4th June 2013, 10:49 AM   #1
lentildude is offline lentildude
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Join Date: Jun 2013
Default 2.1 class d amp with subwoofer output for solar setup

Am looking for a china module that has subwoofer active filter with opamp
and using a digital ta2020 or 2024 tripath chip.

I am going to run it off solar panel/batteries at my house driving some nice 8ohm kef speakers.

I found this
DC 12V TMP4310DS 2 1 Digital Hi Fi Audio Stereo Amplifier Board D Class 2x6 16W | eBay

Is that big cap part of a passive crossover network for subwoofer or is this really 3 powered amps? anyway power too low to drive my Kefs, I just need comfortable background level sound, dont need very high volume but the above one gutless.

initially was looking at this 2 ch 2024 below but would need to drive subwoofer somehow without chewing too much battery power.

Mini MKLL TA2024 Tested PCB Power Digital Audio Amp Amplifier Board 12V 2X15W | eBay

Anyone know of another low cost 3 channel digital amp for my solar setup..??
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Old 5th June 2013, 02:26 AM   #2
lentildude is offline lentildude
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Join Date: Jun 2013
I have found a solution I think, 2 new 2.1 amp boards one using TPA312 chips 20w
the other a 150w using TDA8950TH .

TPA3123 2 1 Channels Class D Digital Amplifier Assmbled Board Subwoofer Kit | eBay

TDA8950TH 2 1 Class D 150W 150W Digital Amplifier Board | eBay

I only need 20w or so, which board would be better quality ???
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Old 5th June 2013, 05:58 AM   #3
DUG is offline DUG  Canada
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Join Date: Jan 2003
Location: mississauga ontario canada
Unless you are going to use more than one battery or are going to build a DC-DC step-up SMPS then you should look for amplifiers that run on 12V.

Look at the data sheets for the devices, not what the seller puts in the ad.

Good hunting.

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Old 6th October 2013, 04:15 AM   #4
tabarddn is offline tabarddn  New Zealand
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Join Date: Apr 2008
Default Battery operated TPA2118

Hi I am running my system a Turntable, Phono Amp, B1 Pre and a TPA3118 50+50 watt amp all from batteries. The B1 and Amp share a 24 volt 7amp (2x12 volt batteries bridged in series) at 2 O-clock vol position it is very loud. Normal listening 1-O clock.
Super quite, no loss of Base slam or dynamics.

The TPA3118 has been replaced by the TPA3116 50+50 at 24 volts. (will work great on 12 volts, just less power) current E/B price for a 3116 is around US$16-00 for the built board. Beats the pants of of the old range of 'T' amps
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