Running La Scalas off Car amp?

[Shomeyrwit]

Hi everbody:

We're gonna be in a Parade in a few weeks and to save money on the sound system I was considering putting my La Sclala'a on the float and running them off a 150watt car stereo amp.

Question, is there any concievable way this could damage the speakers?

I dont see any reason why it would, and have run home speakers off car components without ill effect before but remember being warned about OHM levels, dont really remember why though.

Any input is appreciated.

S

[JohnA]

As long as you don't drive the car amp into distortion there will be no damage at all. However, power amp ratings on car amps are notorious for being overstated. In addition, car amps are rated at 4 ohms or even 2 ohms, but your La Scalas are about 8 ohms.

A car amp rated at 150 watts per channel into 4 ohms would pull over 17 amps. Does it have 2 10 amp fuses? If not, it won't put out 150 watts/ch.

Assuming typical peak power ratings, a 150 watt/ch amp will put out 37.5 watts RMS into 4 ohms and half that into 8 ohms. 19 watts/channel will not make La Scalas rock outdoors. 37.5 watts is about 3 amps into 4 ohms. Does it have two 3 or 4 amp fuses?

Still, as long as you can't hear distortion, you won't hurt anything. Should you actually have 150 watts RMS/ch, you will have plenty of power, as long as the battery lasts.

John