Hello, I'm planning to use this little speaker as a mini-subwoofer (to get along with my little Bluetooth speaker sometimes)
So, I'm looking for a cheap 20/30W mono class D amplifier that works with 12v (ideally would be 5V but that's difficult). What amp do you recomend? It can already include a crossover or I can make my one to use before the amplifier
Here are some pictures of the speaker I'm planning to use. Like I've said, nothing too complex, just help my Bluetooth speaker with a little more low bass.
Thanks in advance,
So, I'm looking for a cheap 20/30W mono class D amplifier that works with 12v (ideally would be 5V but that's difficult). What amp do you recomend? It can already include a crossover or I can make my one to use before the amplifier
Here are some pictures of the speaker I'm planning to use. Like I've said, nothing too complex, just help my Bluetooth speaker with a little more low bass.
Thanks in advance,
20W will be enough as the speaker is 20w but I would like some headroom to the amplifier, that's why I've said 20/30w.
Which 3118 board do you recomend? I'm looking in eBay for some of the cheapest between 2-3€ like this one
What do you think? It's probably enough. Does it have relatively good quality?
Thank you
Which 3118 board do you recomend? I'm looking in eBay for some of the cheapest between 2-3€ like this one
What do you think? It's probably enough. Does it have relatively good quality?
Thank you
This small blue board is the one I use and you can hardly find better value for money. Ideal for a subwoofer with moderate power.
I understand why you like some power headroom. The only problem is if you are limited to 12 V supply, you can get 16-18W power in 4 Ohm. Unless you increase the supply voltage that is the limit.
If you are patient and want the lowest price: 1pcs TPA3118 PBTL mono digital amplifier board 1X60W 12V 24V POWER AMP-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group
I understand why you like some power headroom. The only problem is if you are limited to 12 V supply, you can get 16-18W power in 4 Ohm. Unless you increase the supply voltage that is the limit.
If you are patient and want the lowest price: 1pcs TPA3118 PBTL mono digital amplifier board 1X60W 12V 24V POWER AMP-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group
I'd like to suggest looking for a cheap, used 65-90W laptop charger. The 19-20V those usually have will provide you with a clean 40W into 4ohms.
I mention used ones, because most of the ones that come stock with laptops are from reputable brands (Delta, LiteOn, Hipro etc), and are honestly rated. As opposed to the $2-specials from the far east, that are overrated and potentially death-traps.
You can probably even look through local second-hand shops, or buy&sell sites
I mention used ones, because most of the ones that come stock with laptops are from reputable brands (Delta, LiteOn, Hipro etc), and are honestly rated. As opposed to the $2-specials from the far east, that are overrated and potentially death-traps.
You can probably even look through local second-hand shops, or buy&sell sites
exactly my opinionI'd like to suggest looking for a cheap, used 65-90W laptop charger. The 19-20V those usually have will provide you with a clean 40W into 4ohms.
I mention used ones, because most of the ones that come stock with laptops are from reputable brands (Delta, LiteOn, Hipro etc), and are honestly rated. As opposed to the $2-specials from the far east, that are overrated and potentially death-traps.
You can probably even look through local second-hand shops, or buy&sell sites
btw, maybe you find some old ibm laptop supplies with 16V
It's more a case of getting a reliable and safe power supply.
$3 for an "LED power supply"? That's some CREEPY stuff right there
I don't even wanna know how many corners they cut, in order to get the price down THAT low. Do keep in mind, they also have to make a PROFIT out of that, so ask yourself: how much (or rather, little) is left for the components, and putting the thing together?
And, you know, you always have the option of NOT turning the volume all the way to 100% But that also depends on your signal source, and many other factors anyway.
On page 8 of the datasheet, you have Figure 7. Choose your supply voltage on the X-axis (horizontal), then follow the vertical line until it meets the black curve. At the corresponding height on the Y-axis, you can then see the (mostly) clean (1% THD) power output you can get using that supply voltage.
$3 for an "LED power supply"? That's some CREEPY stuff right there
I don't even wanna know how many corners they cut, in order to get the price down THAT low. Do keep in mind, they also have to make a PROFIT out of that, so ask yourself: how much (or rather, little) is left for the components, and putting the thing together?
And, you know, you always have the option of NOT turning the volume all the way to 100%
But that also depends on your signal source, and many other factors anyway.On page 8 of the datasheet, you have Figure 7. Choose your supply voltage on the X-axis (horizontal), then follow the vertical line until it meets the black curve. At the corresponding height on the Y-axis, you can then see the (mostly) clean (1% THD) power output you can get using that supply voltage.
But do I really need 20V to get 20w in mono from that amp? And for that mini speaker, probably 20w are too much, idk
I’ll try, if I need that I need more, I’ll get a 24V ou try to get a used laptop PS
Oh, another thing. To control the crossover, this little board is good enough, right? Can it be connected to the power source paralelled with the amplifier?
Thanks
Thanks
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Pretty sure you should be able to find a laptop "brick" for cheap enough (definitely under 10eu), maybe even locally. Doesn't matter what connector it has, since you'll likely just chop it off and solder the wires directly to the amp board
I did, on my surround speakers
I did, on my surround speakers
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