Can someone please check the math below and comment if anything looks wrong?
I'm buying a TPA3250 based Class D amplifier. It states it can take a 18v-32v DC power supply. I plan on only using a Dell 19.5v / 3.5amp out (65w) laptop power supply and don't need a lot of power for the speakers in question.
I estimate I will get a max of 17w per channel into 8 ohms (or 31w into 4 ohms)
I'm buying a TPA3250 based Class D amplifier. It states it can take a 18v-32v DC power supply. I plan on only using a Dell 19.5v / 3.5amp out (65w) laptop power supply and don't need a lot of power for the speakers in question.
I estimate I will get a max of 17w per channel into 8 ohms (or 31w into 4 ohms)
If you are using old , chunky type adaptor , you are good to go. Newer adaptors are smaller in size and current(<2A), thus under powered. If possible, reduce the adaptor output wire length as much as possible to avoid current losses. I have used these adaptors in Class D 2.1 setup with 4Ohms spk , works ok
