Stereophile Tests $45k D'Augostino Monoblocks

[John Atkinson]

The factory supplied measurements would be interesting to see, to understand what performance they intended from their amp, but I guess that can’t happen.

Apologies for the tardy response. The distortion measurements supplied by the factory for the sample that I measured were taken at high powers and were basically identical to my own measurements.

John Atkinson
Technical Editor, Stereophile

 

[pma]

The distortion measurements supplied by the factory for the sample that I measured were taken at high powers

I have to smile and you probably know why .

 

[Galliardist]

Apologies for the tardy response. The distortion measurements supplied by the factory for the sample that I measured were taken at high powers and were basically identical to my own measurements.

John Atkinson
Technical Editor, Stereophile

Thanks.
That at least means only one of the three amps reviewed/tested had its bias drift, rather than two of them, which is a positive.

It also suggests that the amp as measured passed quality control with those measurements as they sent out their result - either sloppiness, or deliberate choice/design.

If your suggestion is correct for the cause AND it is a deliberate choice, presumably every technician ever likely to service one of these amps would need to know to bias the output stage as intended - now that would be odd...

 

[HammerSandwich]

Unbelievable. I have plenty of amplifiers with switchable ranges on the power meters. Not hard to have a x1, x10, x100 switch and a proper log scale.

Serious meter aficionados will add the Stereo Power Monitor - 100% analog! - complete with matching steampunk casework, available next year for only $11k.

/s, I hope.

 

[restorer-john]

Serious meter aficionados will add the Stereo Power Monitor - 100% analog! - complete with matching steampunk casework, available next year for only $11k.

Sign me up for one. (not)