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| 04:57.45 | DocScrutinizer05 | arossdotme: I'd use a class-D amp for that, and such amp should be pretty much voltage tolerant on power supply per definitionem. I don't think those 15V are to be taken serious when using a class-D |
| 04:57.58 | DocScrutinizer05 | 16 |
| 04:59.42 | DocScrutinizer05 | also a LiIon battery has 4.2V pretty much only during charging. As soon as you draw some jiuce from it, it drops to 4.1 and 4.05 pretty quickly |
| 05:01.05 | DocScrutinizer05 | but honestly, what the heck?? 500Watts? |
| 05:02.30 | DocScrutinizer05 | that's plain madness for battery powered. Simply because you can't move the speaker for that even with a sack cart |
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| 11:32.08 | arossdotme | DocScrutinizer05, it is a class d amp. i was looking at using car amps but they have this bloody 16v limit :( |
| 11:32.17 | arossdotme | a alpine one :) |
| 11:33.52 | arossdotme | arr i never measured a liion for when in use V drop. inserting |
| 11:34.26 | arossdotme | heh yea 500w is my limit cus the battery size just gets massive and run time not so much |
| 11:34.38 | arossdotme | its for a alpine subwoofer |
| 11:34.45 | arossdotme | *car |
| 11:36.41 | arossdotme | been looking at irs2092 amps and i think ive found one that can use the 45v +/-DC as that is the max output of the only dc to +/- duel dc boost converter (happens to be also designed for audio amps) that i can find |
| 11:40.45 | arossdotme | this is the one, looks like it is/has mono/bridge output? https://www.aliexpress.com/item/DIY-HIFI-Amplifier-V1-0-IRAUD350-700W-4ohm-Mono-Audio-Power-Amplifier-board-Class-D-AMP/32698223625.html?ws_ab_test=searchweb0_0,searchweb201602_1_10056_10065_10068_10055_10054_112_10069_10059_110_111_10073_10017_10071_109_10070_108_10060_10061_10052_10062_10053_10050_10051,searchweb201603_6&btsid=342b64d0-44a8-487c-842b-5d68cd23c950 |
| 11:41.05 | arossdotme | manufacture page https://www.yuan-jing.com/irs2092-class-d-mono-amplifier-board-350w-350w?search=irs2092 |
| 11:44.02 | arossdotme | heh inserting=interesting |
| 11:59.43 | arossdotme | boost: https://www.aliexpress.com/item/500W-single-DC-DC12V-positive-and-negative-double-DC-45V-boost-power-supply-board-adjustable-pressure/32712054819.html?ws_ab_test=searchweb0_0,searchweb201602_1,searchweb201603_6&btsid=28a4982a-0533-4316-bdcc-23c25189fae1 |
| 12:00.32 | arossdotme | so with that irs amp board, i am also trying to work out if the ac is rectified, if so then i can power it from +/-DC directly |
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| 13:43.05 | arossdotme | then again those amp boards dont look too good: http://www.diyaudio.com/forums/class-d/284655-iraud200-short-story.html |
| 16:22.39 | arossdotme | looks like the ac is rectified, looks like those large rectangular things are rectifiers |
| 16:22.48 | arossdotme | arrrgh idk what to do |
| 16:23.11 | arossdotme | theres this very nice board http://www.audiophonics.fr/en/amplifier-boards/irs2092-stereo-class-d-amplifier-2x-200w-4-ohms-p-7128.html |
| 16:23.17 | arossdotme | with prober doc |
| 16:23.46 | arossdotme | but the car amp which looks like it is as good, 2rd hand is £40 |
| 16:24.12 | arossdotme | but the 16v max limit where with the board i get to chose a pwr supply that works for me |
| 16:25.30 | arossdotme | my lion batt is around 300WH so maybe instead of trying to have something that works with the batts i have i should buy the car amp and get a lifepo4 batt using the £60 i saved :) |
| 16:26.08 | arossdotme | that is to say get a batt with 500WH min :) |
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| 18:17.46 | arossdotme | know of any lifepo4 distributors in the uk or Europe? |
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