RSd THD rating and general THD ?

[bdubs767]

I know it's high because of the weird CEA rating but can some one explain to me why their testing method produces such a high THD rating ?


Also any one know at what the number is % wise that the human ear can hear to, for total harmonic dist. ?

[dragonplayboy]

I read on DIY that you can't hear less than 1-5 if I recall correctly

[VW337]

The human ear can not pick up anything less than 3% and the average speaker produces 6-10% on it's own.


In regard to the CEA rating when you increase the power of an amp by their guidelines, once you hit 1% THD at any frequency then you have the power they will accept as your CEA value. No matter how you look at it the rating is equivalent to Xpower at 1% THD on any item rated to CEA standard, not just the RSd's

[bdubs767]

The human ear can not pick up anything less than 3% and the average speaker produces 6-10% on it's own.


In regard to the CEA rating when you increase the power of an amp by their guidelines, once you hit 1% THD at any frequency then you have the power they will accept as your CEA value. No matter how you look at it the rating is equivalent to Xpower at 1% THD on any item rated to CEA standard, not just the RSd's

O I see....basically amps today are rated totally different then they were in the past.

[VW337]

yes and no.

if you look at the ratings area there is usually a box with the a rating and the CEA logo, this is the CEA rated power. You will also see a second set of ratings outside of the CEA box that have "other" power ratings, these are traditional numbers per the manu's previously used methods.

[bdubs767]

Well still the PG rating of RSd lists a 1% THD just w/ more power, while older amps like MS series list a .04 % or .02 %THD (cant remember the # exactly)

[VW337]

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