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Old 4th June 2013, 09:49 AM   #1
diyAudio Member
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, 01:26 AM   #2
diyAudio Member
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, 04:58 AM   #3
DUG is offline DUG  Canada
diyAudio Member
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.

Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
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Old 6th October 2013, 03:15 AM   #4
diyAudio Member
Join Date: Apr 2008
Blog Entries: 1
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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