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

[VintageFlanker]

All combination now available (at least for Arthur 4215) :

@boXem | audio Fred, what about your mono amps? Are these discontinued? Is black now the regular color (without customization) for cheaper Arthur?

 

[boXem]

All combination now available (at least for Arthur 4215) :View attachment 164186

@boXem | audio Fred, what about your mono amps? Are these discontinued? Is black now the regular color (without customization) for cheaper Arthur?

The Ncore based monoblocks had a very limited success to say the least since we started selling the Purifi stereo. So no reason to keep them although I personally think they were a pretty good deal. Purifi based monoblocks will come sooner or later.
And yes, black only for the Ncore based stereo.

 

[Semla]

All combination now available (at least for Arthur 4215) :

... except for the ultimate all boxem orange box

 

[boXem]

... except for the ultimate all boxem orange box

Special edition reserved for the most tasteful of our customers

 

[vicenzo_del_paris]

Hello,

I am a happy owner of an Arthur 3409/N2 (based on hypex ncore 252mp module).

I was looking for an ncore amp.
What decided me to go for Boxem:
- Existing tear downs showing very good assembly care
- External build quality
- External look
- Compact form factor
- Auto sense feature
- Clipping indicator
- Local parts sourcing
- European manufacturer

One would say that Boxem is not the cheapest in the ncore based amplifier market.
But I really do think its build quality and sets of features (autosense, clipping indicator, design) really worth it!

The cover anthracite/back textured paint is gorgeous (I opted in for Oxidized Grey faceplate).

The auto sense is a delight ! It works like a charm. It gets out of stand by as soon it gets a signal (up to 2 sec to power up) and gets in stand by within 10mns without signal.
No more trigger cable nor relay clicks nor pops.

I won't comment on sound quality as it delivers what we can expect from an ncore252mp .
Very controlled, clean and neutral response.

I am very satisfied with this Arthur device and also with the interaction I had with Fred who runs Boxem.

Thank you @boXem | audio
Long life to Arthur lineup !

 

[Theodore8]

Congrats! Grey on grey looks sharp!

 

[bbforce]

Hello,

I am a happy owner of an Arthur 3409/N2 (based on hypex ncore 252mp module).

I was looking for an ncore amp.
What decided me to go for Boxem:
- Existing tear downs showing very good assembly care
- External build quality
- External look
- Compact form factor
- Auto sense feature
- Clipping indicator
- Local parts sourcing
- European manufacturer

One would say that Boxem is not the cheapest in the ncore based amplifier market.
But I really do think its build quality and sets of features (autosense, clipping indicator, design) really worth it!

The cover anthracite/back textured paint is gorgeous (I opted in for Oxidized Grey faceplate).

The auto sense is a delight ! It works like a charm. It gets out of stand by as soon it gets a signal (up to 2 sec to power up) and gets in stand by within 10mns without signal.
No more trigger cable nor relay clicks nor pops.

I won't comment on sound quality as it delivers what we can expect from an ncore252mp .
Very controlled, clean and neutral response.

I am very satisfied with this Arthur device and also with the interaction I had with Fred who runs Boxem.

Thank you @boXem | audio
Long life to Arthur lineup !

I can only fully confirm these statements for my Arthur 4215/E2 bought two weeks ago from Boxem - absolute highlight for me is the build quality (housing but also internal layout and cable routing etc).

In addition the support from Fred is first class - I had a kind of coil whine that was only audible when the amp was in standby (10 minute phase before the shutdown) - after a short alignment with Fred they directly shipped a replacement board that I could exchange myself - problem solved and customer happy .

The combination of Arthur, RME ADI2 DAC and the MiniDSP SHD Studio for Dirac Room correction and Volumio streamer works like a charm

 

[Billy Budapest]

Well, that's the game, right?
Thanks!

Thanks for the nice words. I am French, we also add an 's' at the end of information when there is more than one. Interestingly, tThe typo you mention is not mine, but from the CMS used (prestashop, frenches too...), thanks for spotting it.

There actually is a grammatically correct way to use the plural “informations” in English, but it is the plural of a different meaning of the word “information”:

information

Definition of information in the Legal Dictionary by The Free Dictionary

legal-dictionary.thefreedictionary.com

 

[kepernagel]

The big moment has arrived!

boXem ARTHUR 2408/N2 Review (Stereo Amplifier)

This is a review and detailed measurements of the boXem ARTHUR 2408/N2 stereo class D amplifier. It was kindly sent to me by a member and costs €649.00 Tax excluded (US $735). I really like the differentiated look of the unit with custom front panel and white case which you can see better in...

www.audiosciencereview.com

The results are absolutely pleasing. Congratulations @boXem | audio !!

 

[boXem]

Thank you!
Merry Christmas to everybody

 

[boXem]

Here is the latest little guy, based on Purifi 1ET7040SA. Little but able to output 700W in 2 Ohm
https://boxem-audio.eu/en/mono-amplifiers/28-arthur-4222e1.html

Some work was done on the input buffer in order to compensate the 1ET7040SA higher residual noise when compared to the 1ET400A. At the end, the 4222/E1 residual noise is lower than the one from the 4215/E2.
An active common mode rejection system is implemented in order to limit the risk of ground loop when RCA is used.
boXem amplifiers usual functions are available (audiosense, gain setting ...), with an RCA input and a 12V trigger (in and out) as new features.

 

[Theodore8]

Congratulations on the arrival on latest member of the Arthur family!

The specs are out of this world!

 

[VintageFlanker]

Great job, Fred!

This is textbook behaviour of best class AB designs.

Now, you know where you may send it for measurements...

 

[boXem]

...Now, you know where you may send it for measurements...

Somebody has a PM waiting for him to wake up .

 

[Rja4000]

Nice looking measurements

 

[ririt]

Great job, Fred!

View attachment 223250This is textbook behaviour of best class AB designs.

Now, you know where you may send it for measurements...

Congrats! Impressive job!

 

[restorer-john]

behaviour of best class AB designs.

Better. The noise is incredibly low.

 

[boXem]

Better. The noise is incredibly low.

Thanks John. But the curves are just THD .
Residual noise is indeed quite good, but not 'that' good, 19 uV A-wt with 29 dB gain, 16 uV A-wt for 20.4 and 13 dB gain.

 

[boXem]

Same curves with noise, for clarity

 

[Matias]

Same curves with noise, for clarity
View attachment 223285

How much THD+N % in 5W 1kHz 4 ohms? So that I can add to the list.