Hello Lightminer,
Two points.
1 - The perceived loudness or even measured peak sound pressure does not depend on nominal power you quoted but only on the headroom which is peak power over the duration amplifier power supplies can hold it. If you measured, say 115 dB then knowing the distance from the speaker to the place of the measurement as well as sensitivity of your speakers (at this frequency) is very easy to calculate the power your amplifier generated during this measurement. There is no magic here whatsoever.
2 "without distortion I can tell/hear" - distortion which you can clearly tell or clearly hear is of HUGE magnitude (at very best more then 1%). Much more dangerous are distortions which only your inner old so called "reptilian" brain detect and it gives some signals to your cortex that "something wrong here. Don;'t know what, don;t care but something is not right". Cortex perceived it as slight or substantial discomfort and its called listener fatigue.
A few months ago, I published an article in EnjoyTheMusic describing challenges of faithful music peak reproduction and if you wish I can send it to you.
What iSancez and other owners of LA-300ME are saying, as I understand, is that Joule-Electra LA-300ME preamp re-creates musical crescendo without (or minimum) of subtle distortions leading to much more realistic experience of listening to "preprocessed, recorded" music.
Thank you
