05-26-2024, 11:50 PM

One gain mechanism that i know of is multiple drivers offer increased efficiency.

Simple example is speakers.

1 speaker. 1w in. 90db out

2 speakers. 1w total in. 0.5w each. 93db out

4 speakers. 1w total in. 0.25w each. 96db out

For each doubling of speakers, dividing the 1w input into subsequent doubling of the number of drivers, you increase 3db.

I have a pioneer sub that its 'sensitivity' rating is 96db @ 1w input. if you run the formula that converts the sensitivity rating to efficiency, that sub is 2.5% eff.. 100w in gets you 2.5w out in sound energy. Sound is an energy that can be measured in watts.

Now, whats interesting is, if I add 1 sub, 0.5w each, that sensitivity rating increases to 99db @1w

4 subs, .25w each, 1w total, we are at 112db @ 1w.

Well guess what the formula says the eff is now! 100%eff Yep. Unity.

8 subs should be around 200w out for 100w in... :o

Now conversion back to electrical energy is a project of investigation. There are a few speakers out there that are 112db @ 1w 100%eff And they just may be 100% eff at converting sound back into electricity. Speaker motors are some of the most eff.

Tesla dual motor car should have an increased eff. What if it had 4 motors, one on each wheel? Would we get a 6db increase vs 1 motor?

Recently a school built a 4 motor gokart that did 0-60 in like 1.2 sec i believe with just a 2kw batt pack. I think they see the light.

Mags

Simple example is speakers.

1 speaker. 1w in. 90db out

2 speakers. 1w total in. 0.5w each. 93db out

4 speakers. 1w total in. 0.25w each. 96db out

For each doubling of speakers, dividing the 1w input into subsequent doubling of the number of drivers, you increase 3db.

I have a pioneer sub that its 'sensitivity' rating is 96db @ 1w input. if you run the formula that converts the sensitivity rating to efficiency, that sub is 2.5% eff.. 100w in gets you 2.5w out in sound energy. Sound is an energy that can be measured in watts.

Now, whats interesting is, if I add 1 sub, 0.5w each, that sensitivity rating increases to 99db @1w

4 subs, .25w each, 1w total, we are at 112db @ 1w.

Well guess what the formula says the eff is now! 100%eff Yep. Unity.

8 subs should be around 200w out for 100w in... :o

Now conversion back to electrical energy is a project of investigation. There are a few speakers out there that are 112db @ 1w 100%eff And they just may be 100% eff at converting sound back into electricity. Speaker motors are some of the most eff.

Tesla dual motor car should have an increased eff. What if it had 4 motors, one on each wheel? Would we get a 6db increase vs 1 motor?

Recently a school built a 4 motor gokart that did 0-60 in like 1.2 sec i believe with just a 2kw batt pack. I think they see the light.

Mags