Tadiam,
most chipamps are specified for maximum output current of 3Apk to 7Apk.
This is why they struggle to perform well. I believe the current capability is too low to drive reactive speakers, particularly when the chip gets warm and/or the speaker impedance is low and not efficient.
The 78xx series are limited to 1 to 1.5Apk. That will cripple the performance of the amplifier.
most chipamps are specified for maximum output current of 3Apk to 7Apk.
This is why they struggle to perform well. I believe the current capability is too low to drive reactive speakers, particularly when the chip gets warm and/or the speaker impedance is low and not efficient.
The 78xx series are limited to 1 to 1.5Apk. That will cripple the performance of the amplifier.
Well there are number of reasons for using Vregs.
1) maybe your XFMR voltages are too high.
2) Adapting the rail volts to obtain better chip amp SOA to output impedance ratio. 8-4 ohm switch?
3) Reducing PS ripple.
Usually by using voltage regulation lets one get the last ounce of audio performance from these little chips. Changing the sound of power amps playing near the rails is fun too.
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