recomendations for a +-12v portable amp? - Page 2 - diyAudio
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Old 26th June 2013, 07:46 AM   #11
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Location: uruapan, michoacan, mexico
isit worth going for the new class D equivalents?
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Old 27th June 2013, 05:18 PM   #12
rjsaenz is offline rjsaenz  United States
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Hola ! Martin. Try this setup:
note the different mics for each mixer.
Use this mixer 12v 1/4 TRS Mics
Rolls Corporation - Real Sound - Products MX56c MiniMix A/V Mixer
Or this 12v mixer if you are using XLR mics
Rolls MX34B RESTOCK 01 Live Mix | Full Compass
With This amp t-class which has 2 imputs, comes in handy
Topping TP22 TK2050 (TC2000/TP2050) Class T Amplifier 30WPC 310-322
You will need speaker with an spl of 90db + to get the volume you are probably looking for.

With this battery that can power both at the same time. 20v out for amp and 9V for mixer
Amazon.com: Energizer XP18000 Universal AC Adapter with External Battery for Laptops, Netbooks, and More: Computers & AccessoriesClick the image to open in full size.

You definately need a mixer with mic inputs if you plug a mic directly into any amp you will get nothing but feedback.

Robert
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Old 27th June 2013, 05:34 PM   #13
rjsaenz is offline rjsaenz  United States
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You could also use one of the other amps that have been recommended with this setup as long as it is 16v-20v. so you you can use the 9v-12v output on the battery for the mixer.

Robert
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Old 27th June 2013, 06:14 PM   #14
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Location: uruapan, michoacan, mexico
Default thanks,alot!

I have been out for a while, last time iwas headed towards a multichip-speaker array, 2 or 3 way. Considered chips like 1552 1652Q and some newer equivalents
Maybe i have to do more research. Anyway ithink iŽll be using my
diyer self and try something different. thanks.
martin martinez
uruapan michoacan
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Old 27th June 2013, 06:24 PM   #15
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Default old treasure!

just found these!!



in between



TDA1510.
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File Type: jpg jalale pallaaaa.jpg (77.2 KB, 110 views)

Last edited by martin martinez; 27th June 2013 at 06:26 PM.
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Old 28th June 2013, 06:48 PM   #16
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hard to beat...

15W Bride Stereo Amplifier TDA2005 Un Assembled Kit PCB 9 16VDC 2A | eBay
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Old 28th June 2013, 06:51 PM   #17
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Default TDA2050 rules, with 18650 Lithium ion batteries

Here's my opinion:

take eight 18650 lithium ion batteries (best use PROTECTED AW batteries for the sake of safety), build a symmetrical 2X 14,8V power supply from it, and use the TDA2050 IC. This one is incredibly strong, easy to use and will drive 4 Ohm speakers with ease. Best use very high efficiency speakers.

Timmo.
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Old 29th June 2013, 05:02 AM   #18
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the best speakers i can get are 8ohms, 4ohms only for caraudio, not very good.
iwant to try an array of maybe 8 or more small speakers, inline with 3 or four bigger

Last edited by martin martinez; 29th June 2013 at 05:09 AM. Reason: add
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Old 29th June 2013, 05:21 AM   #19
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i like maybe 3FE25 3in 20W 91dB from faital. and 2 x12 inches
or 3 x8 in

Last edited by martin martinez; 29th June 2013 at 05:23 AM. Reason: add
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Old 29th June 2013, 12:41 PM   #20
johnr66 is offline johnr66  United States
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A bridged TDA2050 amp will get you good power into 8 Ohms and is easy to build and sounds great. The amp below measured 46 watts continuous sine wave into 8 Ohms on my +/- 18 volt supply. This is clean power before clipping. At +/- 12 volts you should still get a reasonable 30-some watts.

The amp is easy to make small yet is dwarfed by the heatsink it needs. Using a fan, you could make it smaller.

Click the image to open in full size.
Click the image to open in full size.

Last edited by johnr66; 29th June 2013 at 12:44 PM.
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