Quote:
Originally Posted by jongig /forum/post/14336289
They do make one like it that's powered but these are not. They are rated much lower than the amp and that does not make me happy. If I purchase these I think they shouldn't be connected to the PassLabs amp? Not sure but I do look for ratings and I don't want to blow these things up.
thanks,
john
You are looking at this completely wrong if you are comparing the amp's rated power output with the speakers power handling rating. They are two entirely different things.
First to the amp.... An amp's power rating is what it is capable of producing on a "continuous" basis. Most decent amps have the ability to produce three to four times their "rated" power output for short periods of time. These peaks are called headroom or dynamic power.
To the speaker's power handling ability, again that's on a continuous basis and then their is usually a peak rating as well that the speaker can handle for short peaks. But, for this rating to mean anything, you must understand how much power that speaker is actually drawing from the amp. And that's shown in the efficiency of the speaker.
With the Polk's you mention for example, they show a 91 dB efficiency rating. What that number means is this.... that speaker produces 91 decibles (dB) of sound averaged across it's frequency range with
ONE SINGLE WATT of power applied as measured from one meter away. IOW, the dB or decible rating is how loud the speaker plays (from one meter away) based on a single watt of power applied to the speaker.
It's also a fact that to raise the volume or output level of a speaker 3 dB's, you must double the power. So, based on the Polk speakers you list and your Pass Labs amp.... here is what would happen:
91 dB = 1 watt of power (equivalent to a noisy factory floor)
94 dB = 2 watts of power
94 dB = 4 watts of power
97 dB = 8 watts of power
100 dB = 16 watts of power (pneumatic jack hammer measured from 2M)
103 dB = 32 watts of power
106 dB = 64 watts of power
109 dB = 128 watts of power
112 dB = 256 watts of power
115 dB = 512 watts of power
118 dB = 1024 watts of power (live rock concert 2M from main speakers)
So based on normal home theater listening volumes of between 80 and 95 dB's.... your Pass Labs amp will be producing between 2 and 6 watts of power on a continuous basis. So the "power handling" rating on the speaker isn't even a factor. Unless of course you had the volume cranked to 112 dB's or higher on a continuous basis. The amp could easily handle it and it would get a little warm. But the speakers would eventually burn up.
Of course, I wouldn't worry about that because you'd need to learn how to sign to communicate any further. You'd be deaf.