Originally Posted by Archaea
If the iNuke 3000 puts out a conservative 500 watts per channel to the four ohm 212ht, then an amp capable of putting out 2000 watts per channel would put out 6 more dB and max out the power rating on the 212ht.
The rule of thumb
in pro audio is to have at least 2x the amplifier power than the RMS handling of the speaker. You can have up to 2.5x the RMS level depending on the crest factor of your content. Peavey
, and others make this 2x recommendation for their speakers. This means you can easily use at least 4000
2000 watts per channel with the 212HT. The testing of the iNuke nu6000 shows it produces 2000 watts peak at 4 ohms. Its continuous power rating is around 1~1.2kW per channel
at 4 ohms. You can use a lot more amplifier than the nu6000 on the 212HTs since it is rated at .5X the speaker's power handling. Edit:
Actually, the JTR speakers are already rated at the max power handling for continuous amp output.
Besides thermal limits, there are also physical limits on drivers. For example, the Neo 8
planar transducer in my LS-6 speakers is rated at 50 watts RMS/150 watts peak. This means it can handle 3x its RMS rating for peaks. I have 6 of these per speaker for a maximum power handling of 900 watts. The 6 1/2" drivers can handle 100 watts RMS and 200 watts peak. I have 8 of these per speaker for a 1600 watt peak. Maximum RMS for my speaker is 1100 watts with peak level handling of 2500 watts per speaker! So, if I go 2x RMS I can still safely use an amp with 2200 watts per channel at 8 ohms. Hmm, I'm severely under-powered with my measly 400 watts.
Originally Posted by Crown Audio
How much power can my speakers handle?
You can determine this by looking at the speaker's data sheet. Look for the Nominal Impedance spec. Typically it will be 2, 4, 8 or 16 ohms. Next, look for the loudspeaker specification called Continuous Power Handling or Continuous Power Rating. It might be called IEC rating or Power capacity.
If you can prevent the power amp from clipping (by using a limiter), use a power amp that supplies 2 to 4 times the speakers continuous power rating per channel. This allows 3 to 6 dB of headroom for peaks in the audio signal. Speakers are built to handle those short-term peaks. If you cant keep the power amp from clipping (say, you have no limiter and the system is overdriven or goes into feedback) the amplifier power should equal the speakers continuous power rating. That way the speaker wont be damaged if the amp clips by overdriving its input. In this case there is no headroom for peaks, so you'll have to drive the speaker at less than its full rated power if you want to avoid distortion.
If you are mainly doing light dance music or voice, we recommend that the amplifier power be 1.6 times the Continuous Power rating per channel. If you are doing heavy metal/grunge, try 2.5 times the Continuous Power rating per channel. The amplifier power must be rated for the impedance of the loudspeaker (2, 4, 8 or 16 ohms).
Here's an example. Suppose the impedance of your speaker is 4 ohms, and its Continuous Power Handling is 100 W. If you are playing light dance music, the amplifier's 4-ohm power should be 1.6 x 100 W or 160 W continuous per channel. To handle heavy metal/grunge, the amplifier's 4-ohm power should be 2.5 x 100 W or 250 W continuous per channel.
If you use much more power, you are likely to damage the speaker by forcing the speaker cone to its limits. If you use much less power, you'll probably turn up the amp until it clips, trying to make the speaker loud enough. Clipping can damage speakers due to overheating. So stay with 1.6 to 2.5 times the speaker's continuous power rating.