odd junkyard speakers

[Pete M]

found an older Porsche Cheyenne twin turbo at the self serve yard the other day.  poor thing used to be a real nice ride.   but anyway, I grabbed the speakers out of it and though I'd share.  on the right are the primary door speakers with the inverted magnet design for minimal depth applications, and the other is the "sub" woofer from the back of the SUV.  reeeeeally stretching accuracy to use the word "sub" though.  the magnet is large, the cone is... not.   

 

not sure what I'm going to do with them yet, but they were odd enough I had to grab them.    (plus it was half-off day.  plus the pancake speakers were "part of" the 97 XJ doors I bought so they were free.   the same doors that somehow had the door panels off the 95 XJ that was next to it )

 

side note, BMWs seem to come with tiny speakers all around and are not worth pulling the door panel to check. 

 

 

[COMJNUT]

The speaker in the right looks like the bose speakers in the mazda miata. Be careful with those they had a very low impedance, 0.5-2ohms. That is how they get the lows out of a small subwoofer speaker. My 04 LJ has a dual voice coil subwoofer that is 2ohms per coil from the factory.

[Pete M]

good to know! 

[ghetdjc320]

The shallow depth speakers are not bad at all. Lots or oems used them. They tend to be a bit limited on excursion but that’s not universally applicable. BMW tends to run 4” door speakers  and sail panel tweeters. But their speaker placement is normally much higher up on the door than our trucks. The higher placement is very good for stereo imaging and has the added benefit of getting the tweeter and woofer closer together in a 2 way component setup. 
 

For the Comanche, the knee panel tweeters were a decent attempt at getting the tweeter and woofer closer together but the aiming is quite bad. A properly designed coaxial speaker such as a Morel integra is a great fit in the stock door locations as they properly recess the tweeter to get it in the acoustic center of the woofer. Provides a nice wide stereo “sweet spot” with a single source driver. 
 

97+ corvettes also have a neat subwoofer module in the door which could be an interesting retrofit candidate depending on depth. 
 

As a side note, a speaker’s impedance doesn’t determine how loud it gets — that comes down to its sensitivity. One clean watt of power usually lands somewhere around 85–95 dB depending on the speaker.

Doubling the wattage doesn’t double the volume, and even “1000 watts” is usually just a quick peak at a narrow frequency for a split second. It still won’t come close to doubling the SPL compared to a solid 200‑watt amp. A lot of manufacturer specs lean pretty hard on marketing, so the numbers can be misleading.

Honestly, a good speaker with 5 clean watts behind it can sound surprisingly great.