What are the Ohm ratings? newbie


Newbie question!

I have Spica speakers which are rated at 4 Ohms. My HK AVR300 says it has an 8 Ohm output. The system sounds OK at moderate volumes but I have to crank it up to really make it sound good.

1. What does the Ohm ratings mean?
2. Would a receiver that is rated with a 4 Ohm output be able to drive the Spica's at lower volumes?
3. What are the performance issues with matching / mismatching speaker Ohm to receiver Ohms.

Thanks!
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robotman

Showing 1 response by whitesandbluewater

More about what the first guy said. He absolutely correct in all. But what needed to be mentioned is than audio signals introduces different impedance (ohms)right across the audio spectrum, simultaneously. If your amp isnt up to the job it will certainly be identifiable with speakers rated at 4ohms, since the current needed to maintain a signal and keep your amp stable is increased. A decent power supply will have no problem with 4 or 8 ohm speakers. a lousy power supply limits the bandwith and creates higher harmonic distortion (escpecially in the higher order 4th or 5th). This is where your power starts to go south. In short - if your are noticing this, than your in the market for a new amp.