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Thanks. Indeed I am more loose in my modelling. There are many models one can use. The simpler the better if it works as well. Power delivery and control can be perceived. Mostly the brain will compensate and sometimes smear over our perceptionI view an amplifier as a variable voltage source that has a low source resistance. I do not think I'd want the source resistance varying with the music, since speakers will sound different when driven with sources of various output impedances, since that affects damping of cone motion, among other things.
A stiff supply is always recommended. High ripple caps and or regulation usually drives costs up. As a result hi-fi enthusiasts prefer to buy a 300watt amplifier for 30watts duty. That headroom allows one to work with a variety of designs.You basically want a good, stiff power supply for an amplifier. Power supply rejection ratio (PSRR) of the amplifier determines how stiff (low source impedance, Zo) the supply needs to be. A balanced push pull or bridge-type one with high PSRR is much more immune to supply voltage variation than a single ended (low PSRR) deign would be.
I understand the desire to make things easy for people to understand but such approximation is misleading... pedantry aside. An amplifier shouldn't be a variable resistor.. ever.. Ideally , you would need to be of a very low and not variable resistance... Let's see the Power Supply, for what it is:, it supplies the power for the amplifier to increase the level of the signal... It seems to me self-explanatory... The better the power, the better the amplification, all things being equal...You could also see an amplifier is a variable resistor that sits between your power supply and speakers. If the amplifier is a perfect variable resistor. Then you're simply listening to your power supply distortion free. Whether your power supply has the reserve to reproduce what was recorded is another matter. Many times you'll hear reviewers commenting that this or that amplifier can drive or not drive this or that speaker. It all boils down to the meat on the bone and the characteristics of that variable resistor.
This is a very quiet economical power supply featuring four 8200uf caps suitable for 28-0-28 transformers for up to 2 ohm total load. That is a 4 ohm stereo speaker setup. Amplifiers sound better when reasonably used. You could also use one of these modules per amplifier each with its own transformer for lower impedance speakers. Features high current fast recovery rectifiers for the cleanest switching. Hope you enjoy it.
Dimensions
200.03mm * 106.81mm
Mounting
The module has holes for mounting. M3 screws and standoffs would be suitable for attachment.
Where we have reserves we can use voltage regulation. Where we have unreliable supply we use reservoirs as buffersAll an amplifier wants is a constant current source. Look at the schematics of the best amplifiers in the world such as the Hexorcist, all based on JFETs. It is composed of a well-filtered power supply (as you mention) but then a current regulation that requires very little filtering (just like a 75xx or a switch mode power supply) which do not support filtering under the condition of lowering its noise capacity and its impulse response. Please read the datasheet of the components that are used and stop guessing !
You could also see an amplifier is a variable resistor that sits between your power supply and speakers. If the amplifier is a perfect variable resistor.
... Let's see the Power Supply, for what it is:, it supplies the power for the amplifier to increase the level of the signal... It seems to me self-explanatory... The better the power, the better the amplification, all things being equal...
All an amplifier wants is a constant current source.
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Do you want a white wine or balsamic vinaigrette with your salad?It is especially crucial to have a reasonable power supply when employing negative feedback in a power amplifier architecture. Back in the good old days when solid state amplifiers came into the market there were scenario's of harshness due to generated harmonics under various circuit conditions. The reason LPs still carry the day is that they have information loss or warmness that seems pleasant to the ear. In the end even in any recording its about the harmonic signature from the studio as well as secondary harmonics from your equipment under normal as well as fault conditions.
No amplifier acts like a variable resistor and class D amplifier does not look like a variable resistor. It applies the full rail voltage to the output, with PWM regulation. The only resistance is the the semiconductor switch’s on resistance, very low. It appears more as a current source to the load, since it’s the current that builds through the inductive filter and load.Not really...
That said a class-D can be kind of seen as this (before the post filter) but they usually don't use linear unregulated power supplies.