Different Re!

[mtchyz250f]

I am interested in purchasing a pair of JBL midbasses. One speaker has 5.0 Ohm resistance and the other 5.6! Is tis common or is something wrong? Specs call for an Re of 5.7.

[spkrman57]

I would say they are okay to use.

Regards, Ron

[mtchyz250f]

I am not an electrical engineer, but how can they perform similarly with a 10% difference?

[SMKSoundPro]

Because you're measuring DC resistance. The AC impedence may be very similiar to each other.

Please remember that AC impedence and DC resistance are both "measured" in Ohms, but have few similarities electrically.

I am sure someone else will chime in and correct me if I did not write correctly, but I hope get the point.

Two JBL 2118 midbass drivers that measure 5.0 and 5.7 DC ohms will sound very much the same in the proper enclosure/ crossover...

Remember: This audio stuff is ALL about compromises.

And my favorite: E=MC² ±3db

Scotty.

[jcrobso]

To increase the sound level by 3db you have to double the electrical power in.
Thus the 10% difference in DC resistance makes very little difference in the long run.
Enjoy your JBLs. John

[mtchyz250f]

Thank everyone.