Atoll IN200 measurements - any good?

[Modellbobby]

So often I am searching here for objective measurements and less bashing of these imo great pieces of metal.

Please find a full detailed measurements analysis LINK

Listening Test Link

Anybody can comment the measurements results? Look rather nasty right ?

 

[Modellbobby]

So often I am searching here for objective measurements and less bashing of these imo great pieces of metal.

Please find a full detailed measurements analysis LINK

Test Link

This FFT measurements show pretty nasty harmonics right ?

Can some expert here go to the measurements in the link and conclude ?

 

[osscar]

from site: "This integrated amp is a true dual-mono design. (Some manufacturers market their amps as dual monos; however, when you look inside, you see only one transformer.) The IN200 operates in class-A mode up to 40W before switching over to class AB—impressive engineering. Not many integrated amps out there do this."

I can't imagine even class AB with such small heatsinks ...according to the distortion profile - class B rather - such a forest of harmonics..you can see how fast distortion rises after 1Khz...from 0.2% to 2%

 

[tom_tom]

I still have and use sometimes Atoll in100se. It's very well build , heavy, dual mono amp that I really like. I do not expect great measurement from it.

 

[Scytales]

The Atoll IN100 (whatever the version) is not a dual mono : there is one single symmetrical power supply for the two channels of amplification.

The two power transformers are wired in parallel, as are the capacitors (2 in parallel per supply rail).

 

[VintageFlanker]

Anybody can comment the measurements results?

In200 Signature measurements are absolutely horrendous. A true piece of garbage.

I still have and use sometimes Atoll in100se

I do not expect great measurement from it.

Measures terrible as well (up to 3% THD according to Stereo DE).

 

[Scytales]

There is mistakes on the webpage of the IN100SE test on stereo.de.

There is no mistakes in the downloadable review on stereo.de, but you must buy it (it's affordable) : https://www.stereo.de/archiv/2004/11/ah-toll-59230

When you get a subscription on the Stereo magazine, you can even download complete measurement-reports of the tested gears, with more measurements and graphs.

The THD of the IN100SE is 0.37% (50 mW), 0.32% (5W) and 0.42% (-1dB from 128 W) on 4 ohms load.

The figures published on the Stereo.de webpage are actually intermodulation distortion on 4 ohms load : 6.6% (50mW), 2.2% (5W) and 2.47% (-1 dB from 128W).

 

[VintageFlanker]

There is no mistakes in the downloadable review on stereo.de, but you must buy it (it's affordable) : https://www.stereo.de/archiv/2004/11/ah-toll-59230

Thanks.

The THD of the IN100SE is 0.37% (50 mW), 0.32% (5W) and 0.42% (-1dB from 128 W) on 4 ohms load

Which still is particularly bad.

 

[Scytales]

Intermodulation distortion is much worse, especially at such low output levels !

 

[tom_tom]

Which still is particularly bad.

That is true. I still like it though in a way like people like old muscle cars.

 

[Geert]

Looking at measurements Atoll doesn't care too much about THD, that's for sure. If someone considers an Atoll amp; forget about the IN100, it's a toy. Go for the IN200 Signature.

A year ago I replaced my IN200 Signature with a Cambridge Audio Edge A. The latter is one of the best measuring non-class D amps ever. No audible difference (at normal volume levels) .... It's known our hearing is not that sensitive to distortion.

My main issue with Atoll is their thermal management, which is close to non existing (undersized heatsinks, slow thermal protection).