How many amps does my power supply transformer need to be to power a pair of the $1.99 LM1875 kits form China? I will be powering the amp with 24 volts.
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Hi
just some thread below you will find a lot of informations:🙄
eBay mono LM1875 kit
with 8R speakers
so a 80VA-120VA / 18VAC- 0-18VAC dual transformer should do. after rectifier you get about 28V DC at the amp modules.
if you use 4R speakers i would choose a 80VA-120VA / 15VAC- 0-15VAC. after rectifier you get about 21-22V DC at the amp modules.
chris
just some thread below you will find a lot of informations:🙄
eBay mono LM1875 kit
with 8R speakers
so a 80VA-120VA / 18VAC- 0-18VAC dual transformer should do. after rectifier you get about 28V DC at the amp modules.
if you use 4R speakers i would choose a 80VA-120VA / 15VAC- 0-15VAC. after rectifier you get about 21-22V DC at the amp modules.
chris
The $1.99 LM1875 kit pales into insignificance when you realise the cost of the power supply.
VA of transformer is usually 1.5 times power of amplifier.