I have recovered a 2.1 amp which I want to use for a small project. Unfortunately, the amp is uncomfortable with the 4 ohm subwoofer driver. It is currently being powered by a 13-0-13 1.5 amp transformer. I have a 15-0-15 2.5 amp transformer. Is the higher voltage likely to increase the output tolerance?
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13 V AC supply means an estimated 10 V rms output for a single ended amp. that translates to 2,5 amps for a 4 ohm load.
the voltage increase to 15 V will not change very much, in my opinion.
you will not be able to drive all three amps to maximum output, as this requires more current than the supply can provide and the supply voltage will collapse.
eventually the 2.1 amp may have a BTL amp for the bass. in this case the current requirements will increase further.
BTL = 20 V output -> 5 amps for a 4 ohm load.
also, depending on the chip-amp(s) they may limit output current or shut down, as they each "see" a 2 ohm load.
the voltage increase to 15 V will not change very much, in my opinion.
you will not be able to drive all three amps to maximum output, as this requires more current than the supply can provide and the supply voltage will collapse.
eventually the 2.1 amp may have a BTL amp for the bass. in this case the current requirements will increase further.
BTL = 20 V output -> 5 amps for a 4 ohm load.
also, depending on the chip-amp(s) they may limit output current or shut down, as they each "see" a 2 ohm load.
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What do you mean by 'tolerance'?
& what is the part number of those ic's? Tda2030/50? how many? 1.5amp transformer is pretty low for a 2.1 subwoofer system.
I think I understood that correctly.
it means that the original transformer is not able to provide enough current for maximum power of the amp with 8 ohm speakers, let alone for 4 ohm speakers and not even speaking about BTL.
if not driving the amp to the max it may be perfectly ok, though.
by the way, what do you mean with
does the amp shut down? does it clip or distort? does it get too hot?
