new budget system
Printed From: Speakerplans.com
Category: General
Forum Name: 12v Powered Systems
Forum Description: From Mini-rigs to ICE, all your low voltage audio needs here...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=97568
Printed Date: 18 April 2024 at 11:10am
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Topic: new budget system
Posted By: ostrichmilkman
Subject: new budget system
Date Posted: 19 January 2017 at 3:07am
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hey guys been a while since i was last on here just moved out to Australia and had to leave my beloved boom box behind and its making me sad. thinking of building a new one but on a pretty serious budget this time. thinking the cheapest way would be to just buy some old hifi speakers and nick the drivers and crossovers out of them and probably use a sla 12v battery for power the question is, what amp should i use ? is the old lepai ta2020 still my best bet ? found this on ausi ebay that seems to fit the bill but its worryingly cheap and im wandering if anyone can vouch for it or if anyone knows of a decent cheap amp board that will run a couple of bookshelves. or even a mono amp that would just run one but really well. ??? http://www.ebay.com.au/itm/TDA7492-2x50W-D-Class-High-Power-Digital-Amplifier-Board-AMP-Board-TE398-/172456208763?hash=item282730e97b:g:tigAAOSw5cNYXNJ7" rel="nofollow - http://www.ebay.com.au/itm/TDA7492-2x50W-D-Class-High-Power-Digital-Amplifier-Board-AMP-Board-TE398-/172456208763?hash=item282730e97b:g:tigAAOSw5cNYXNJ7 probably a much asked question but any advice would be mega appreaciated cheers guys ------------- work like a dog party like animal |
Replies:
Posted By: ostrichmilkman
Date Posted: 19 January 2017 at 3:25am
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liking the look of this bad boy http://www.ebay.com.au/itm/Efficiency-TA2021-Digital-Amplifier-DIY-Kit-Mini-Module-Chip-Protective-TE433-/262790599933?hash=item3d2f8a54fd:g:OSIAAOSw241Ya4It" rel="nofollow - http://www.ebay.com.au/itm/Efficiency-TA2021-Digital-Amplifier-DIY-Kit-Mini-Module-Chip-Protective-TE433-/262790599933?hash=item3d2f8a54fd:g:OSIAAOSw241Ya4It any knowledge on how the ta2021 stacks up against the ta2020 ? also could do with some help getting my head around A: making a circuit that will automatically turn off the system when the voltage drops too low B: being able to charge and use the boom box at the same time without interference, (thinking of making it solar powered at some point) ------------- work like a dog party like animal |
Posted By: Ganon
Date Posted: 19 January 2017 at 10:08am
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Dont know if they ship to Aus, but take a look at Accusafe's products, they have a battery protect board, and a maxamp, that uses less then ta2020 and gives more watt. And it's tiny, really tiny. |
Posted By: ostrichmilkman
Date Posted: 20 January 2017 at 2:21am
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Awesome ill have a look mate cheers ------------- work like a dog party like animal |
Posted By: ostrichmilkman
Date Posted: 20 January 2017 at 2:22am
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Awesome ill have a pool cheers. Have you heard it in use what sort of drivers was it running ??? ------------- work like a dog party like animal |
Posted By: Ganon
Date Posted: 20 January 2017 at 8:08am
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I have tested it on Electro Voice sx200, and that sounded good, i have it put up to some Argon hifi speakers at my work, and that sound pretty good aswell, many people use it in the boominator. |
Posted By: bitSmasher
Date Posted: 20 January 2017 at 9:09am
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Where in Aus are you? Jaycar have a couple of options for battery cut-out, premade: https://www.jaycar.com.au/battery-discharge-protector/p/AA0262" rel="nofollow - https://www.jaycar.com.au/battery-discharge-protector/p/AA0262 kit: https://www.jaycar.com.au/battery-saver-kit-for-rechargeable-lithium-and-sla-batteries/p/KC5523" rel="nofollow - https://www.jaycar.com.au/battery-saver-kit-for-rechargeable-lithium-and-sla-batteries/p/KC5523 ------------- https://www.instagram.com/batteryacidsoundsystem/ |
Posted By: slaz
Date Posted: 20 January 2017 at 11:34am
Don't know anything about that unit - but IMHO its preferable to just build in a cheapie voltmeter and monitor the battery voltage manually ..... (much cheaper also). If your battery is anything other than in perfect nick - it will have a significant internal resistance - which in turn means voltage will drop on a heavy bass note/kick drum/other peak in signal - which might well trigger the cut-off when the battery still has useable capacity. ------------- REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON |
bitSmasher wrote:Posted By: ostrichmilkman
Date Posted: 20 January 2017 at 6:23pm
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As you say in the past i just opted for a volt meter so I may well just do that l. Hadn't thought about that its a good point and another reason to just stick with the cheaper option. ------------- work like a dog party like animal |
Posted By: slaz
Date Posted: 20 January 2017 at 6:36pm
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Some of those digital numeric displays can consume up to 20-30 mA - which doesn't sound much - but it could easily be as much as the idle current of a class D chip-amp. On my best setup I have a momentary-contact microswitch to only enable the VM on the fly. ------------- REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON |