what should the relationship between a head unit and speakers be in terms of power?

Answer 1

In terms of RMS power the head unit should have the same RMS or 15% more than the speakers RMS per channel.

HU 19RMS x 4 is 19RMS watts per channel (speaker if you like) L front R front L rear R rear 4 channels.

Each speaker in this case should be at least 16.5RMS minimum. Its ok to have a bigger RMS rating on your speakers than your HU's internal amps output.

Answer 2

You actually don't have much of a choice. There are very few head units with an RMS output rating higher than around 20-25 watts per channel, while virtually all after-market speakers are rated to handle quite a bit more. Luckily, having speakers rated for higher power than the head unit can produce doesn't hurt anything at all.

Answer 3

A ratio of 1 to 1 is preferable, but the head unit must be higher than necessary and the speakers, lower.

I had problems with mine for that very reason, but with a little adjustment and a steady hand, I managed a complete reversal in temperament.

That should solve most of your problems with feng shui. But be open to new things and colours in the field of expertise. Keep an open mind and remember, Rome wasn't built, just last May.

You may want to redirect another question my way, as I am always try, try again in this answering dilemma. All things come to he who'll debate. Squeak and ye shall be found. Good-bye my friend, good-bye.

All that for two points?

Answer 4

the RMS power ratings should match, it doesnt have to be exact but the closer the better , but make shure its RMS power, good brands allways specify RMS power