Increasing subwoofer impedance

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#21
I can only offer a real-world, non-technical answer. Most amps manufactured in the last 20 years know their limitations. If you attempt to push too much power into too low a resistance they will temporarily down tools, take a moment, and suggest you sort your life out.

The moment a passive crossover is in play the impedance of the driver becomes irrelevant. If you want to safely want to run your subs at full volume, in parallel, a coil offers more effective and robust resistance than a resistor.
 
#22
Bfpca said:
If you have an 8 ohm speaker and you are putting a 4 ohm woofer in parallel with it, you can expect to have trouble when your receiver is only rated at 6 ohms minimum. You would normally calculate the nominal parallel speaker impedance to be (1/ (1/8+1/4))=2.7 ohms. Have you looked a using the Bi amp speaker terminals to give the passive subs their own amplifier channel? This has a much better chance of working without overloading the amplifier.
Download the manual if you don’t have a printed copy and figure out what is possible for those biamp terminals.
Click to expand...

Thanks a lot! Looks like using the spare channels would be the safest and the most workable solution.🙂
 
#23
Surtsey said:
I can only offer a real-world, non-technical answer. Most amps manufactured in the last 20 years know their limitations. If you attempt to push too much power into too low a resistance they will temporarily down tools, take a moment, and suggest you sort your life out.

The moment a passive crossover is in play the impedance of the driver becomes irrelevant. If you want to safely want to run your subs at full volume, in parallel, a coil offers more effective and robust resistance than a resistor.
Click to expand...

Point noted. Thanks for the clarification.
 
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