Should I start this project?

[presscot]

I used to own a pair of ADS L880 speakers. I currently miss them so much. I know the easiest way is to find and buy one. But, I have a number of unused speaker drivers. Some of them are car audio speakers. A pair of 10” subwoofers is planned to be used in this project—ADS RS10. The RS10 is 10” subwoofer with dual voice coils. Each v/c is 3 Ohms, so it allows to select between 3 and 6 Ohms impedance mode.

I’d like to ask everyone if there are people build a “three-way” speaker system whose woofers are 1) actually subwoofers and 2) being car audio speakers. Anyone?

If there are any, then, how about the result?

Also, I’ve heard that “normally” subwoofer drivers would have lower sensitivity/ SPL than the actual woofers resulting in requiring more power from amplifier or alternatively attenuating sensitivities of midrange and tweeter instead. Is this true?

All in all, should I start this project of using car audio subwoofer as a woofer in three-way speaker design?

 

[AllenB]

Efficiency trades against bandwidth, and while you're making the cone heavy to bring down the resonance, what is it doing to breakup damping, and to the higher frequency levels..

 

[Harry72]

6mm xmax seems a little low for a subwoofer nowadays?

 

[weltersys]

Also, I’ve heard that “normally” subwoofer drivers would have lower sensitivity/ SPL than the actual woofers resulting in requiring more power from amplifier or alternatively attenuating sensitivities of midrange and tweeter instead. Is this true?

Yes, you can see the 2.83 v (a bit more than one watt into 6 ohms)sensitivity drops from ~94dB at 100Hz to ~77dB at 20Hz, a 17 dB drop in sensitivity.

Around 15 times the power would be required just to equal the sensitivity difference between those frequencies.

All in all, should I start this project of using car audio subwoofer as a woofer in three-way speaker design?

Up to you.
A pair of the RS10 at Xmax (maximum linear excursion, 10% distortion) could do about 93 dB at 20 Hz.

That's not as loud as one RS10 driven with one watt at 100 Hz.
About the equivalent loudness of 30dB SPL at 1kHz, a whisper level.

 

[Lojzek]

In all likeliness considering everything, it's not something you should do.

 

[ChrisABC]

3 way with Auto -Infinity subwoofer

Jay's Vagrant Tower
TC7fd-4
SDS-160F25PR01
Infinity 1062W

https://jaysspeakerpage.weebly.com/vagrant-tower.html

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2 way kit Cabrini (Johnny Richards) Jule Fidelity
GRS 8SW-4 Subwoofer (Parts Express Q&A- people also use these in vehicles)
https://www.parts-express.com/GRS-8SW-4-8-Poly-Cone-Subwoofer-4-Ohm-292-480?quantity=1

https://www.jfcomponents.com/product-page/cabrini-the-last-speaker-kit-pair