More 'Audiophile' bullsh*t

[Deranged Rover]

Baron Greenback said:

1400watt mono amp at £350k each https://www.whathifi.com/news/goldmunds-flagship-t... wonder who the target audience are for these amps? Willy waving or music studio or somethings else.

1400W? Miserable effort.

I'll take a pair of Analog Domain Apollos, ta - 4000W into 8 Ohms and 8000W into 4 Ohms. I think they're somewhere in the region of 220k Euros each.

https://analogdomain.eu/index.php?option=com_conte...

As an aside, I have actually heard them and they are utterly incredible. Surprising delicacy and a sweet midrange, all underpinned by thunderous deep, well controlled bass, and the underlying sense that if you got silly with the volume control, they would destroy your speakers, your room and anything else within a few hundred feet.

[911hope]

Deranged Rover said:

1400W? Miserable effort.

I'll take a pair of Analog Domain Apollos, ta - 4000W into 8 Ohms and 8000W into 4 Ohms. I think they're somewhere in the region of 220k Euros each.

https://analogdomain.eu/index.php?option=com_conte...

As an aside, I have actually heard them and they are utterly incredible. Surprising delicacy and a sweet midrange, all underpinned by thunderous deep, well controlled bass, and the underlying sense that if you got silly with the volume control, they would destroy your speakers, your room and anything else within a few hundred feet.

Well ... the specs claims don't really add up. Look at the claimed max current draw from the mains and explain how 8kW can be delivered into 4 Ohms.

[Sporky]

911hope said:

Well ... the specs claims don't really add up. Look at the claimed max current draw from the mains and explain how 8kW can be delivered into 4 Ohms.

8kW is the peak power.

So a big old bank of capacitors to deal with peaks.

[psi310398]

Sporky said:

8kW is the peak power.

So a big old bank of capacitors to deal with peaks.

Otherwise, I have visions of what happens to the lights in small towns in the Southern US whenever Ol’ Sparky is put to use on Death Row!

[911hope]

Sporky said:

911hope said:

Well ... the specs claims don't really add up. Look at the claimed max current draw from the mains and explain how 8kW can be delivered into 4 Ohms.

8kW is the peak power.

So a big old bank of capacitors to deal with peaks.

Calculate the capacitance requires to deal with 8kw into 4ohms for 50ms, every 500ms.

[Sporky]

911hope said:

Calculate the capacitance requires to deal with 8kw into 4ohms for 50ms, every 500ms.

Sure, once you show me that those are the design parameters.

And bake me a cake.

[TonyRPH]

That Apollo amp might well be running a bridged output stage to achieve that kind of power - however the current demands from the mains would require a 16A feed?

[911hope]

Sporky said:

911hope said:

Calculate the capacitance requires to deal with 8kw into 4ohms for 50ms, every 500ms.

Sure, once you show me that those are the design parameters.

And bake me a cake.

Practical worst case music scenario for a PSU /amp to handle is compressed fast paced (about 100 beats/minute) driven into clipping (either by excess gain, or the recording being clipped)

50ms not an unreasonable duration of the clipping.

Await the calculation of required capacitance...

[TonyRPH]

911hope said:

<snip>

Await the calculation of required capacitance...

[911hope]

Sporky said:

911hope said:

Well ... the specs claims don't really add up. Look at the claimed max current draw from the mains and explain how 8kW can be delivered into 4 Ohms.

8kW is the peak power.

So a big old bank of capacitors to deal with peaks.

8kW peak power, so RMS power is 8000/1.41 = 5.67kW ( to be honestly rated, this is not burst power)

Linear amplifier is at best 65% efficient, or 80% if a Class G design, so let's be generous....

Power input required 5.67/0.8 = 7.1kW.

Required current from 230V mains, is 7.1kW/230 = 30.8A

This is a bigger number than their claimed 16A and will not be available from a domestic supply.

[swisstoni]

Maybe it plugs into a domestic EV charge point.

[robinessex]

911hope said:

Sporky said:

911hope said:

Well ... the specs claims don't really add up. Look at the claimed max current draw from the mains and explain how 8kW can be delivered into 4 Ohms.

8kW is the peak power.

So a big old bank of capacitors to deal with peaks.

8kW peak power, so RMS power is 8000/1.41 = 5.67kW ( to be honestly rated, this is not burst power)

Linear amplifier is at best 65% efficient, or 80% if a Class G design, so let's be generous....

Power input required 5.67/0.8 = 7.1kW.

Required current from 230V mains, is 7.1kW/230 = 30.8A

This is a bigger number than their claimed 16A and will not be available from a domestic supply.

Plug it into the cooker (45amp) socket, and eat cold food ?

Edited by robinessex on Tuesday 22 August 09:53

[911hope]

robinessex said:

911hope said:

Sporky said:

911hope said:

Well ... the specs claims don't really add up. Look at the claimed max current draw from the mains and explain how 8kW can be delivered into 4 Ohms.

8kW is the peak power.

So a big old bank of capacitors to deal with peaks.

8kW peak power, so RMS power is 8000/1.41 = 5.67kW ( to be honestly rated, this is not burst power)

Linear amplifier is at best 65% efficient, or 80% if a Class G design, so let's be generous....

Power input required 5.67/0.8 = 7.1kW.

Required current from 230V mains, is 7.1kW/230 = 30.8A

This is a bigger number than their claimed 16A and will not be available from a domestic supply.

Plug it into the cooker (45amp) socket, and eat cold food ?

Edited by robinessex on Tuesday 22 August 09:53

Solution is to cook food on amplifier. It will be plenty hot.

[sparkyhx]

Gary C said:

Baron Greenback said:

wonder who the target audience are .

People who are very very far away

people who buy their £500,000 speakers from Goldmund
https://www.stereonet.com/uk/news/goldmund-gaia-la...

or their 25k DAC
or their £280k turntable plus arm support, arm and cartridge

[Sporky]

911hope said:

Await the calculation of required capacitance...

I don't recall ever agreeing to a game of "dance, monkey, dance".

If you want the sums done, do them yourself.

Edited by Sporky on Tuesday 22 August 15:30

[Deranged Rover]

911hope said:

8kW peak power, so RMS power is 8000/1.41 = 5.67kW ( to be honestly rated, this is not burst power)

Linear amplifier is at best 65% efficient, or 80% if a Class G design, so let's be generous....

Power input required 5.67/0.8 = 7.1kW.

Required current from 230V mains, is 7.1kW/230 = 30.8A

This is a bigger number than their claimed 16A and will not be available from a domestic supply.

But that's a calculation for continuous operation, which is completely unrealistic unless you happen to like listening to white noise or sine waves.

I have a pair of active loudspeakers in my lounge. Each has 13 amplifier modules in with a total power output of 8200W, however they plug into a 13A socket and I have never blown any fuses or tripped any breakers when running them at levels that make my eyeballs vibrate and things upstairs rattle.

There's a very big difference between running something flat out continuously and requiring very short term bursts of high power.

[Spleen]

Oh man, here we go again. Make it stop, the nerdiness is killing me. I know not of what you speak.

[Harry Flashman]

I know. Please stop! Post some snake oils products for us to laugh at, I stead of giving us a headache.

We are simple people, easily entertained, and easily bored.

[911hope]

Deranged Rover said:

911hope said:

8kW peak power, so RMS power is 8000/1.41 = 5.67kW ( to be honestly rated, this is not burst power)

Linear amplifier is at best 65% efficient, or 80% if a Class G design, so let's be generous....

Power input required 5.67/0.8 = 7.1kW.

Required current from 230V mains, is 7.1kW/230 = 30.8A

This is a bigger number than their claimed 16A and will not be available from a domestic supply.

But that's a calculation for continuous operation, which is completely unrealistic unless you happen to like listening to white noise or sine waves.

I have a pair of active loudspeakers in my lounge. Each has 13 amplifier modules in with a total power output of 8200W, however they plug into a 13A socket and I have never blown any fuses or tripped any breakers when running them at levels that make my eyeballs vibrate and things upstairs rattle.

There's a very big difference between running something flat out continuously and requiring very short term bursts of high power.

Indeed, but that is the standard against which you must quote rated power, for a consumer product. Continuous sine RMS power, for 5 minutes for signals between claimed min max freq range, according to the FTC, which is a universally followed by the respected players in the industry. Oh..and don't forget to pre-heat at 1/8 power for 1 hour.

For information, the power density of white noise is far lower than that of a sine wave.

For further information, highly compressed dense music driven into clipping is about 1/3 of sine power density.

[Spleen]