Please help clear up a question about MONOBLOCKS

[Arkless Electronics]

PSRR may need some explanation, unless I'm underestimating the electronics knowledge of typical forumites.

Hmm yeah I considered explaining it... but didn't Hey if yer going to get accused of being patronising at times you have do the opposite now and then to keep em guessing I'm off out in a mo with a few beers to watch Jools Holland at mates place so if you would care to do the honours Andrew?

[RothwellAudio]

PSRR stands for power supply rejection ratio. Without getting too technical it's basically a measure of how well an amplifier shrugs off the inadequacies of a less-than-perfect power supply.

BTW, going off at a slight tangent, I think it would be helpful for people not to get too hung-up on the "power" side of a power supply and instead think of it as a voltage supply. Sure, for power amps it's important to have some power available, but mostly it's a steady voltage which is required. Actually, that's still true for power amps - but the voltage needs to hold steady under more demanding conditions.
Anyway, the idea that a "good power supply" means one which will supply more power - and is therefore big - is over-simplistic in my opinion.

[Wakefield Turntables]

PSRR stands for power supply rejection ratio. Without getting too technical it's basically a measure of how well an amplifier shrugs off the inadequacies of a less-than-perfect power supply.

BTW, going off at a slight tangent, I think it would be helpful for people not to get too hung-up on the "power" side of a power supply and instead think of it as a voltage supply. Sure, for power amps it's important to have some power available, but mostly it's a steady voltage which is required. Actually, that's still true for power amps - but the voltage needs to hold steady under more demanding conditions.
Anyway, the idea that a "good power supply" means one which will supply more power - and is therefore big - is over-simplistic in my opinion.

Good post. Explains a bit. So it's very important to have a very high PSRR and equally important to have a very "rigid" regulated power supply, so ?steady regulated voltage holds under demanding conditions??????

[danilo]

Not necessarily.. 'Best of Breed' Amp topologies often don't benefit from a regulated supply.
Lesser circuits typically need all the boost they can get... from any quarter.

Only news here IMO is the lengths we as Audio Weenies will go to in our search for the ultimate hardware advantage..
To Replay our cheap mass-market recordings of dubious quality...

[Arkless Electronics]

PSRR stands for power supply rejection ratio. Without getting too technical it's basically a measure of how well an amplifier shrugs off the inadequacies of a less-than-perfect power supply.

BTW, going off at a slight tangent, I think it would be helpful for people not to get too hung-up on the "power" side of a power supply and instead think of it as a voltage supply. Sure, for power amps it's important to have some power available, but mostly it's a steady voltage which is required. Actually, that's still true for power amps - but the voltage needs to hold steady under more demanding conditions.
Anyway, the idea that a "good power supply" means one which will supply more power - and is therefore big - is over-simplistic in my opinion.

Yes, indeed a PERFECT VOLTAGE SOURCE is what we seek. This implies the capability to give infinite power of course since P = Vsqrt/R so if R = 0 power is infinite.

Now obviously this isn't possible... and even less practical or affordable! What a good linear regulator does is make the power supply behave as if it has infinite power...... up to the point where it goes bang and releases the magic smoke installed at the factory in every electronic component... or if it's competently designed goes into current limit and saves itself. So long as we don't require more power, ie current draw, (Power = Volts x Amps also of course, or so Mr Ohm says)) than the regulated PSU is designed to supply, we have a near as damn it perfect voltage source. Perfect voltage source = zero output impedance = infinite power, should the load try to draw it. The balance of compromises chosen in chasing but never reaching perfection applies to linear regulated power supplies as to everything else of course!