Bohemian_Rhapsody Posted October 10, 2002 Share Posted October 10, 2002 I just checked the specs for Klipsch Promedia 4.1s and 5.1s on this website. They were as follows: PM4.1: FTC Rated Subwoofer: 70 watts @ ¡Ü 1% THD, 25 - 50Hz PM5.1: FTC Rated Subwoofer: 170 watts @ ¡Ü 3% THD, 40 - 100Hz Now these ratings have been given without testing them on the same frequency ranges. I am not sure what THD precisely means but i think the readings would be different if the 5.1s sub is tested at 1% THD. I also think that the subwoofers tend to fart out more on low frequencies ( 25 - 50 ) as compared to the higher ( 40 - 100 ) frequencies. I am confused about the exact ratings of the subwoofers so i was thinking if anyone can help me out here. Quote Link to comment Share on other sites More sharing options...
justin_tx_16 Posted October 10, 2002 Share Posted October 10, 2002 A sub is not supposed to have low THD ratings like satellite speakers. that is why subs can be powered using cheaper amps. you will spend $2500 for a tube amp for your sub and in the same system $300 for an amp for your sub. Quote Link to comment Share on other sites More sharing options...
Bohemian_Rhapsody Posted October 10, 2002 Author Share Posted October 10, 2002 Ok, so i understand that the subwoofer ought not to have low THD ratings. Is the THD rating related to the quality of the amp?, or can the ratings be re-listed with a higher THD rating like the PM 5.1 or the PM 2.1 sub. Does the tested frequency range in any way affect the calculated wattage?. Quote Link to comment Share on other sites More sharing options...
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