Hi all, i have been reading and enjoying the forum for quite a while, this is my first post so far.
Im planning to build an amplifier using L15D Pro boards (L + R) and dual +/- 48V 3A DC power supplies, links below:
http://www.ebay.com/itm/Assembled-LJM-L15D-Pro-Power-amplifier-board-IRS2092-IRFB4019-2-Boards/121481115088?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D29947%26meid%3Dfe928685e7324bccad3f6e2d97ef4c4c%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D120687170518&rt=nc
5V 12V 24V 48V 1 2 3 5 7 5 10 15 20 30 40 60A Switch Power Supply Driver Adapter | eBay
And i was wondering how to conenct them, the simple way is just as option 1 in the figure, straigth forward. But considering that usually left and rigth channels drive similar signals from the source (i guess), would'nt the option 2 (inverting input and output) be better to increment the effective power during signal peaks?? so one channel drains from +48V an the other from -48V. Could it work?
diagram:
https://www.dropbox.com/s/742ibvpwd6axmah/connection_options.png?dl=0
I could not find the answer to this question, but maybe is somewhere else already written, or maybe this is the usual way to connect them (option 2) in that case i apologize.
Also other question, the above power supply selected is ok? i did not want to spend much money... should i get something better?
Thank you.
Im planning to build an amplifier using L15D Pro boards (L + R) and dual +/- 48V 3A DC power supplies, links below:
http://www.ebay.com/itm/Assembled-LJM-L15D-Pro-Power-amplifier-board-IRS2092-IRFB4019-2-Boards/121481115088?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D29947%26meid%3Dfe928685e7324bccad3f6e2d97ef4c4c%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D120687170518&rt=nc
5V 12V 24V 48V 1 2 3 5 7 5 10 15 20 30 40 60A Switch Power Supply Driver Adapter | eBay
And i was wondering how to conenct them, the simple way is just as option 1 in the figure, straigth forward. But considering that usually left and rigth channels drive similar signals from the source (i guess), would'nt the option 2 (inverting input and output) be better to increment the effective power during signal peaks?? so one channel drains from +48V an the other from -48V. Could it work?
diagram:
https://www.dropbox.com/s/742ibvpwd6axmah/connection_options.png?dl=0
I could not find the answer to this question, but maybe is somewhere else already written, or maybe this is the usual way to connect them (option 2) in that case i apologize.
Also other question, the above power supply selected is ok? i did not want to spend much money... should i get something better?
Thank you.
Last edited:
3 Amps might be enough for one channel and only 8 ohm loads, barely. By the time you've bought 4 adequate supplies and two amps and a case, it'll cost more than the Behringer EP2500 that I got used.
I was able to test the two connection options and sadly the option 2 does not work. When inverting the input that channel is muted. Maybe it could work for another type of source, in my case the left and rigth inputs share ground.
With those power supplies it seems that the output sound level is way more than enough for my living room, but i don't know how much distorsion is being created for using cheap power supplies.
Regards
With those power supplies it seems that the output sound level is way more than enough for my living room, but i don't know how much distorsion is being created for using cheap power supplies.
Regards
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