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RE: Question...

Posted by BigguyinATL (M) on March 29, 2016 at 11:26:41

In Reply to: RE: Question... posted by E-Stat on March 29, 2016 at 09:12:23:

You see I don't understand that... I would alway leave the clipping protection on!

-10dB indications mean perhaps you had peak levels at -8dB relative to 70Volts of so clipping point of the 300 Watt into 8 ohm XLS1500. 70 Volts - 8dB is about 28 Volts. The 50 Watt NAD clipping point is very near that.

Of course, there is a lot of uncertainty here with my napkin math. The two amps likely do not have calibrated indicators.

It's an easy test to confirm, either turn on the NAD soft clipping or turn down the volume a little (-5dB or so) and reconfirm your observations.

I'm not saying the XLS1500 is sonically better than the NAD - it is probably not. Its design purpose is not for discriminating audio. But you should give it a fair shake.

Note: When I read you review, and I see the adjectives "Transparency", "Air" and "Chimes and reedy things bathed in upper harmonics", I think that we might be concerned about a DC offset in your Advent's woofers, caused by the clipping NAD on asymmetrical (all music clipping is of this type of wave form (especially percussive sounds) causing an increase in distortion that (just like a "good" SET) has lots of "Air" and "Transparency".

I'm sure you have read the various Elliot Sound Labs articles on amplifier clipping.





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