Any risks running large speakers with a relatively small receiver?

[JoeESP9]

We need to inform newbies that it's not necessary to match a speakers wattage rating with a receiver/amplifier's output rating.

Speaker wattage ratings are for the most part totally worthless. Sensitivity and efficiency ratings are far more important.

As has already been said, "If it starts to sound bad turn the volume down". No other admonition is needed.

 

[toddalin]

My garden railroad trains have digital sound systems digitally sampled from the real engines. They only put out 1 watt max. But through a big JBL, you could swear that a real train is coming at you!

 

[hopeless]

A perfectly square waveform contains all frequencies from DC to daylight. One quick way to test the bandwidth of a device is to feed it a square wave and see what you get out. Rolled-off high frequencies are revealed by the corners of the square wave being rounded. Rolled-off low frequencies are revealed by the top and bottom of the square wave being slanted rather than horizontal.
Anyway, the point is that a 1kHz square wave actually contains much higher frequencies than 1kHz. A clipped waveform (which is square) therefore contains high frequencies generated by the distortion which weren't there before. That's why distorted electric guitars sound the way they do - they have extra high frequency harmonics generated by distortion.
So, yes, clipping is high frequency energy, or at least contains high frequency energy that wouldn't be there otherwise.

Saw a great demo of that stuff early in my audio career. A couple of amplifiers on a scope playing single tones. Spaced out tones from 15k to 2hz. Enlightening.

 

[the skipper]

I think a lot depends on how loud to play it. You're already read about square waves.

As was said before. if it starts to sound harsh, strained, or just plain bad, turn it down immediately..

 

[Lavane]

We need to inform newbies that it's not necessary to match a speakers wattage rating with a receiver/amplifier's output rating.

Speaker wattage ratings are for the most part totally worthless. Sensitivity and efficiency ratings are far more important.

As has already been said, "If it starts to sound bad turn the volume down". No other admonition is needed.

Well said. With a really efficient speaker 1 watt can get really loud. More efficient speakers tend to sound better at low volumes also. That's been my experience anyway. I didn't mean to start the whole clipping debate. I just thought the OP should understand his lower watt receiver could damage higher watt speakers just as easily as pumping 100 watts into speakers rated for 20 watts.

 

[cgutz]

As stated above, AVOID CLIPPING.

The risks of damaging a speaker by pushing a low powered amplifier past it's limits into "clipping" are far greater than overpowering a speaker with "too large" of an amplifier.

You can more likely to damage a pair of speakers rated at 100 watts with a 10 watt amplifier driven to clipping than you will damage a 10 watt speaker with a 100 watt amplifier.

Clipping is when the amplifier reaches the point where the signal waveform has the top an bottom portion of the wave cut off or "clipped". Imagine looking at a signal on an oscilloscope, where the waveform rises, crests then falls away in a nice, smooth arc. Clipping is where the top and bottom of that are are flattened because the amplifier can not deliver the energy required to keep the arc smooth.

AMEN! I have seen more speakers damaged by low power amps pressed too hard into clipping, than by powerful amps pushing clean wattage into a speaker past its rating.

The OP will have no issues if both amp and speaker are in ok shape, and not pushed past limits into distortion.