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  #25  
Old 05-25-2013, 03:49 PM
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Re: Factory Speaker Impedance

True value...possible. I will measure some tonight to show the difference of 4ohm vs. 2ohm. I will take some pics. In the meantime, check out madisound and parts express. Look at the resistance in relation to the nom. Impedance.
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  #26  
Old 05-25-2013, 03:50 PM
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Re: Factory Speaker Impedance

By no means am I a engineer. Just using my experience over the past 20 something yrs.
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  #27  
Old 05-25-2013, 04:24 PM
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Re: Factory Speaker Impedance

Ok, fair enough but I am a (UK) degree qualified electroincs engineer of some 30 years experience, 10 years of which were spent in car audio design and installation. I've had a passion for domestic and PA loudspeaker design since I was a teen (I'm now in my 50's!!). Not professing to know everything about the subject by a long way but I have done a lot of measurements of car audio systems - and with the correct equipment. I had a look at the Madisound web site but can't find any useful information on there. Any chance of a link?
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  #28  
Old 05-25-2013, 04:33 PM
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Re: Factory Speaker Impedance

Go into the speaker store. Start looking at driver spec sheets. You will see Resistance value in relation to nom. Impedance. I will post some links for popular diy drivers we use in car audio when I get on laptop.
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  #29  
Old 05-25-2013, 04:37 PM
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Re: Factory Speaker Impedance

Your highend manufacturers tend to be 8ohm drivers. Might be difficult to find anything in 4ohm let alone 2ohm.
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  #30  
Old 05-25-2013, 05:15 PM
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Re: Factory Speaker Impedance

Here is a popular sub for car audio use -
Dayton Audio RSS315HO-44 12" Reference HO DVC Subwoofer 295-467

Another -
Dayton Audio RSS315HF-4 12" Reference HF Subwoofer 4 Ohm High Fidelity Reference Series 295-464

Tweeter -
Vifa D27TG-35-06 1" Silk Dome Tweeter 264-1022

Tweeter -
Vifa OT19NC00-04 3/4" Fabric Dome Tweeter 4 Ohm 264-1122

Tweeter -
Dayton Audio RS28F-4 1-1/8" Silk Dome Tweeter 275-140

Excellent midrange/tweeter -
Fountek FR88EX 3" Neodymium Full Range Driver 296-719

Another excellent performer -
Dayton Audio RS100-4 4" Reference Full-Range Driver 4 Ohm 295-378

Woofer -
Vifa NE180W-04 6-1/2" Full Range Woofer 264-1096

Woofer -
Dayton Audio RS180-8 7" Reference Woofer 295-355

Woofer -
The Madisound Speaker Store

Woofer -
The Madisound Speaker Store

Woofer -
The Madisound Speaker Store


These just some that get ran in the car audio world...Tons more..out there. It's hard to find anything in 2 ohm.
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  #31  
Old 05-25-2013, 05:26 PM
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Re: Factory Speaker Impedance

In looking at the Infinity 2ohm collection, they measure around 2.2-2.3. Like I said, I'm more than confident that the Alpine system has 2 ohm 6x9's and DVC 2 ohm sub.

The question becomes, is the amp rated the same 2ohm vs. 4ohm. I would say yes, just based on the fact that OEMs like to use 2 ohm drivers.
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  #32  
Old 05-25-2013, 05:42 PM
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Re: Factory Speaker Impedance

I just checked the JL Audio 3 ohm series drivers. They measure from 2.4 up to 2.7 depending on driver.
The TW series 2 ohm measures at 2.1 DC resistance.
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