Rule of thumb for wattage?

[lazzer408]

Why bother calculating.
Fit the 8ohms speaker/s and listen.

8ohms speaker will not damage a 4ohms capable amplifier
And
the amplifier will perform better into the higher load impedance.
And
you may find that the 8ohms speaker is more sensitive/efficient and you get more sound output at the same source volume setting.

Tried it with multiple amps. I get distortion before I reach the volume desired. Also, the gain has to be set high which increases noise. The amplifier output is less into an 8 ohm load.

I could always use a bridged 4 channel on the fronts and a 2 channel un-bridged on the rears. But I'm limited on space.

 

[JohanH]

If you lined up a 100hp Harley Davidson (low rpm, high torque) against a 100hp sportbike (high rpm low torque), who wins?

Ok, this one I know

https://www.youtube.com/watch?v=NdKqe0LdWwc

Cheers,
Johan

 

[sofaspud]

Thanks. He states a 26.28v rail. Not clear if he's using a single or dual rail. If I use a +/-32v supply, do I use 32v or 64v in my calculations?

Remember that the audio signal is referenced to ground, so can never exceed the rail voltage (either + or -, but not both). So 32v in your case.
I'll call BTL a special case.

 

[lazzer408]

Ok, this one I know

https://www.youtube.com/watch?v=NdKqe0LdWwc

Cheers,
Johan

2 lengths ahead in a 2 block race? 😛

Remember that the audio signal is referenced to ground, so can never exceed the rail voltage (either + or -, but not both). So 32v in your case.
I'll call BTL a special case.

Makes sense. I'd go bridged but it's cheaper and easier to rewind a toroid.