Say "Hello!" to boXem | audio Arthur series, Hypex and Purifi based power amplifiers

[boXem]

Do you have any internal pics of the Arthur 5523/E1?

Here you go, not the best picture I ever took...

 

[Salt]

Nice snake skin surroundings of the cable

 

[Nordling]

@boXem Hello Fred, on your website I noticed some errors in the Description and Product details of the Arthur 4216/E1.
In the Description: "In the Arthur 4216/E1, the amplification stage can deliver up to 375 W in 8 Ω and 1050 W in 2 Ω." doesn't seem right. In the Product details the Reference and Power stage(s) don't seem right.
Could you please check?
Edit: typos

 

[mjgeorge]

@boXem Hello Fred, on your website I noticed some errors in the Description and Product details of the Arthur 4216/E1.
In the Description: "In the Arthur 4216/E1, the amplification stage can deliver up to 375 W in 8 Ω and 1050 W in 2 Ω." doesn't seem right. In the Product details the Reference and Power stage(s) don't seem right.
Could you please check?
Edit: typos

A couple additional notes where it looks like there might have been some copy/paste errors:

In the 4216/E2 product description under "Purifi Eigentakt technology" it identifies the wrong Purifi module:

For the Arthur 4216/E2 we have chosen to implement the Purifi Eigentakt technology with the 1ET9040BA amplification stage.

Then as Nordling noted, it also lists higher power output (probably corresponding to the specs for the 1ET9040BA.

Finally, in the Product Details, the "Power Stage(s)" is incorrectly identified as the "Purifi 1ET9040BA".

 

[boXem]

@boXem Hello Fred, on your website I noticed some errors in the Description and Product details of the Arthur 4216/E1.
In the Description: "In the Arthur 4216/E1, the amplification stage can deliver up to 375 W in 8 Ω and 1050 W in 2 Ω." doesn't seem right. In the Product details the Reference and Power stage(s) don't seem right.
Could you please check?
Edit: typos

A couple additional notes where it looks like there might have been some copy/paste errors:

In the 4216/E2 product description under "Purifi Eigentakt technology" it identifies the wrong Purifi module:

For the Arthur 4216/E2 we have chosen to implement the Purifi Eigentakt technology with the 1ET9040BA amplification stage.

Then as Nordling noted, it also lists higher power output (probably corresponding to the specs for the 1ET9040BA.

Finally, in the Product Details, the "Power Stage(s)" is incorrectly identified as the "Purifi 1ET9040BA".

Corrected, thanks guys!

 

[pogo]

There should be two more cables for the outputs that are not yet connected.
Why is the full potential of the new module not being used, as described in the data sheet?

 

[Theodore8]

Congrats @boXem on continuing to reach for the stars!

My Arthur 4215/E2 with matte grey case & anodized grey front plate with the historical logo has just become a rare collectible!

 

[boXem]

There should be two more cables for the outputs that are not yet connected.
Why is the full potential of the new module not being used, as described in the data sheet?
View attachment 389796

The two additional wires are here to enable a biwiring option. As you can see, this option is not available on our amplifier, partially due to the lack of space, partially due to my personal opinion on biwiring.
If, like I suspect, you are wondering why a few Watt are missing in 2R, it is due to the power supply chosen. I won't discuss the choice of PS any further, it is anyhow taboo on this site.

 

[pogo]

T+A A200 and Marantz Model 10 also do not use the full specified output power of purifi modules. This is purely an implementation decision and it is OK.

 

[jamesdyson]

If, like I suspect, you are wondering why a few Watt are missing in 2R, it is due to the power supply chosen. I won't discuss the choice of PS any further, it is anyhow taboo on this site.

A few?????? I think 350 watts is just a bit more than a few.

How are you going with the measurements?

 

[boXem]

That's 1.25 dB less in sound power.

 

[jamesdyson]

If that's your argument then perhaps it's better to stick with a cheaper 7940 based amp. Overall it's only 1.75dB less power than the 9040.

 

[whislai]

Corrected, thanks guys!

Congratulations for a new product which push the limit into such a small candybox!!! I'm surprised today as I saw the new Arthur 4216/E2, but it seem the board specification still not corrected, is this the correct one "Purifi 1ET6525SA power stage"? And the power delivered in different load:
In the Arthur 4216/E2, the amplification stage can deliver up to 210 W in 8 Ω and 510 W in 2 Ω.?

 

[boXem]

These parameters are correct, the Purifi 1ET6525SA replaces the famous 1ET400A and gains some Watt in heavy loads due to what appears to be an even better efficiency.

 

[whislai]

These parameters are correct, the Purifi 1ET6525SA replaces the famous 1ET400A and gains some Watt in heavy loads due to what appears to be an even better efficiency.

argh I think so, because I look wrongly, it was the mono amp I'm looking

 

[jamesdyson]

@boXem do you have the measurements available yet?

Thanks

 

[boXem]

Purifi sent us improperly calibrated modules. We had to ship back our entire stock and are waiting the parts back. At the moment we are stuck, not only on the measurement side.
Before the subject comes, amplifiers sent to customers are not impacted by this calibration issue.

 

[pogo]

Bridge-Mode calibration?

 

[boXem]

Common mode trim.

 

[jamesdyson]

Purifi sent us improperly calibrated modules. We had to ship back our entire stock and are waiting the parts back. At the moment we are stuck, not only on the measurement side.
Before the subject comes, amplifiers sent to customers are not impacted by this calibration issue.

O.K. Do you have a measurement of one of the unaffected amps? Your development tests or production QC tests?