Stock 10 speaker setup impedance?

[ryszardsh]

Anyone happen to know if the stock 10 speaker system uses 4 ohm speakers or 8 ohm speakers or some oddball? I have the 5.25 inch adapters for my blown out 4 inch rear speakers, just trying to figure out if I need 4 ohm speakers or 8 ohm. Been so darn long since I bought speakers I did not even know there was such a thing as a 4 ohm available now.....

Thanx

RAS

[cjm1219]

I just changed out my blown stock rears for 5 1/4 with the adapter. They were 4 ohm.

I used just the woofer from these, which are 4 ohm speakers.


http://www.sonicelectronix.com/item_...c=7&zmap=36932

Works well and was really easy to install.

If I remember right the stock tweeters back there are 8 ohms

[ryszardsh]

answering my own question: I turned on my brain, grabbed my multi meter and checked one of the blown cone speakers I pulled out - the stock 4T rear speakers are 4 ohm speakers.

RAS

[scoobtothenoog]

Originally Posted by cjm1219

I just changed out my blown stock rears for 5 1/4 with the adapter. They were 4 ohm.

I used just the woofer from these, which are 4 ohm speakers.


http://www.sonicelectronix.com/item_...c=7&zmap=36932

Works well and was really easy to install.

If I remember right the stock tweeters back there are 8 ohms

What adapter did you use?

[cjm1219]

Originally Posted by scoobtothenoog

What adapter did you use?

http://www.ebay.com/itm/180776586010...84.m1439.l2649


Was really easy and took no cutting or drilling. Could go back to stock without any issues.

[scoobtothenoog]

Sweet. It doesn't state that they are for our cars and that they are for 2005's and up. They work for our cars though for sure?

[ryszardsh]

Works for sure, that was the cure to my blown speakers. Just make sure you put them on the correct side of the car - the 2 parts you get are mirror imaged, necessary given the screw stud patters, and the parts "can" be installed upside down on the wrong side. if you do that there will be an air gap between the adapter plate and the car, does not sound as good as getting them on the correct side...

RAS

[zoner]

Originally Posted by cjm1219

I just changed out my blown stock rears for 5 1/4 with the adapter. They were 4 ohm.

I used just the woofer from these, which are 4 ohm speakers.


http://www.sonicelectronix.com/item_...c=7&zmap=36932

Works well and was really easy to install.

If I remember right the stock tweeters back there are 8 ohms

I just purchased a pair of those adapters yesterday, right after I discovered that my left rear speaker is blown. Funny, I had looked at those same Boston drivers as well but I'm concerned that the stock amp may not be powerful enough to feed those speakers the power they need to sound good. Did you notice that you have to turn in up a little more to get the same level of sound?

[cjm1219]

Originally Posted by zoner

I just purchased a pair of those adapters yesterday, right after I discovered that my left rear speaker is blown. Funny, I had looked at those same Boston drivers as well but I'm concerned that the stock amp may not be powerful enough to feed those speakers the power they need to sound good. Did you notice that you have to turn in up a little more to get the same level of sound?

I put in a new head unit at the same time and both my rear woofers were beyond blown so I had nothing to compare to as far as sound level between stock and aftermarket.

[austinindian]

Does anyone on the list have specs for the OHM requirements for each of the 10 speakers? I picked up this set and now think that I might have the wrong speakers, in terms of ohms. The orig tweeters in the rear have stickers that read "8 ohms." These new tweeters in the set I ordered are 4 ohms. I've been reading about using different ohm speakers with this setup and it seems it can affect the amplifier.

Here is the set I purchased:
http://www.amazon.com/Rockford-Fosga...pr_product_top

[austinindian]

After looking over this thread. It seems that the rear mid is a 4ohm speaker and the tweeter is 8ohm. Can anyone with the stock speakers confirm this. Does that sound correct to have different ohm specs like that?

[John Firestone]

It is not unusual for tweeters to have a higher impedance since they draw so much less power. I would give more attention to their sensitivity (sound pressure for a given voltage level) and check that it matched the output of the lower frequency drivers.

[austinindian]

Thx, John. I do have a multimeter. Should I check the voltage from all eight wires going to the rear speakers? I was refraining from using the amp since there were no speakers connected. Not sure if that is something to worry about however. Based on what I'm gathering in this thread, I should ditch the 4ohm tweeters that came with my set and go with 8ohms. That correct?

[John Firestone]

I was thinking more along the lines of doing a sound level check.

Traditionally, you would use a tone generator and a sound meter, sweep past the crossover frequency, and record and plot the response. These days, folks do that or an impulse response test using a computer and a reference microphone. At least that's how I would do it, but I would also build bits of audio equipment or loudspeakers if I needed to. Hmmmm. I fear I may be the wrong nothing to answer your question.

[austinindian]

Originally Posted by John Firestone

I was thinking more along the lines of doing a sound level check.

Traditionally, you would use a tone generator and a sound meter, sweep past the crossover frequency, and record and plot the response. These days, folks do that or an impulse response test using a computer and a reference microphone. At least that's how I would do it, but I would also build bits of audio equipment or loudspeakers if I needed to. Hmmmm. I fear I may be the wrong nothing to answer your question.

Oh, no problem at all. Discussion is good and I'll figure out something in time. I'm trying to track down a local 318ti with stock speakers to look at the specs. I will definitely update the thread with any findings.