The World's First Power Amplifier with SINAD over 120!!!

[abdo123]

But apparently mine aren't? I post a ton of measurements but you and john focus on one number and complain that you did that?

Oh come on the pot stirring trio does this every other week i thought you would be used to it by now

 

[amirm]

Yes he does. He knows very well what he is doing, which cannot be said about many posters here.

Some posters here seem to have a mission to just complain. Is it your position that consumers would be better served with no measurements as opposed to having mine?

 

[amirm]

Oh come on the pot stirring trio does this every other week i thought you would be used to it by now

Our posts crossed. Well said.

 

[amirm]

I previously had two Behringer A800 amplifier, when I bench tested them I found I could achieve the same power that Amir did but only for about 10 seconds at which time a limiter kicked in and power output dropped. Maybe it was a design change from the amplifier that Amir reviewed but it has certainly made me a bit wary of ASR power sweeps

I did one continuous test and blew up an amplifier. Such a test doesn't represent music listening so I can't defend it either.

 

[mdsimon2]

I did one continuous test and blew up an amplifier. Such a test doesn't represent music listening so I can't defend it either.

Understood. For my own curiosity, how long does that power sweep test take?

Michael

 

[pma]

Yes but a continuos test tells something about the design competence and reliability. It separates toys from real amplifiers. JA is always doing a 30 min preconditioning at about half maximum power, now maybe at 1/8 power.

 

[amirm]

Understood. For my own curiosity, how long does that power sweep test take?

I am just estimating but I think it is one minute from start to finish. About 5 to 10 seconds are under heavy load. Timing is variable and depends on how stable thd+n readings are.

 

[192kbps]

I am just estimating but I think it is one minute from start to finish. About 5 to 10 seconds are under heavy load. Timing is variable and depends on how stable thd+n readings are.

amirm, What amp did you use to test the speakers? AHB2？

 

[amirm]

Yes but a continuos test tells something about the design competence and reliability.

I am not here to assess reliability, nor is any other review site. You don't even know the ambient temp for their tests. Or level of airfliw.

 

[amirm]

amirm, what amp did you use to test the speakers?

For what? Measurements or listening tests?

 

[192kbps]

For what? Measurements or listening tests?

Measurements.
Mark Levinson or AHB2？

 

[Mnyb]

I would like to get back to topic , it would be interesting to see this measured for sure

 

[192kbps]

I would like to get back to topic , it would be interesting to see this measured for sure

 

[amirm]

Measurements.
Mark Levinson or AHB2？

Neither. I use a Behringer pro amplifier. The amp needs to be powerful, run cool and reliable for hours on end during testing. FYI its frequency response is compensated to flat by Klippel analyzer.

 

[amirm]

JA is always doing a 30 min preconditioning at about half maximum power, now maybe at 1/8 power.

I also do preconditioning during warm up. I actually post this result to the extent performance varies. I see no point in continuing to "condition" an amp once its performance has stabilized:

You don't get this type of measurements from JA, do you...

 

[Eldus]

I hope it is. More likely to be in my price range if it is - and the performance will be excellent.

And lower heat output.

 

[192kbps]

Neither. I use a Behringer pro amplifier. The amp needs to be powerful, run cool and reliable for hours on end during testing. FYI its frequency response is compensated to flat by Klippel analyzer.

When listening test, use PA5?

 

[_thelaughingman]

Much ado about nothing. You lot complain about a product that's not out, let alone measured reliably by a 3rd party.

 

[Mnyb]

Some are apparently pre-bashing the product , before much is known about it just in case .

Is there any preliminary specs known ? Power per channel ?

 

[amirm]

When listening test, use PA5?

In near-field and recently, yes. Before that, I used my Purifi reference design for that use. The main 2-channel system is powered by Mark Levinson reference amplifier.