How much THD (Total Harmonic Distortion) % is acceptable?

<10% THD <50hz is considered good usually I think? But what is acceptable? What is bad etc etc? And is 1% THD a lot better than 9% THD?
 

paulst10

Distinguished Member
<10% THD <50hz is considered good usually I think? But what is acceptable? What is bad etc etc? And is 1% THD a lot better than 9% THD?
Basically the lower THD across the entire frequency range the better :)

I would consider 10%THD @ 50hz quite poor (depending on how many DB's it was producing).

A reasonable THD figure (depending on subwoofer) would be something like 100db @ 30hz with 10%THD

An exceptional THD figure would be something like 100db @ 20hz with 8%THD :eek:
 

paulst10

Distinguished Member
Last edited:
So would say a 5% reduction in THD at 30hz from 9% to 4% say at 100db make a lot of improvement?

Or because the THD is <10% this reduction does not matter
 

paulst10

Distinguished Member
So would say a 5% reduction in THD at 30hz from 9% to 4% say at 100db make a lot of improvement?

Or because the THD is <10% this reduction does not matter
IIRC, the audible threshold is around 10% so anything less than probably wouldn't be audible ? :)
 

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