Speakers’ DCR Is Much Lower Than 8 Ohm

[jxdking]

Specs Impedance 8 Ohm. DCR measured at 3.6 Ohm. Is that normal? I can confirm both speakers measured same value. No fault.

 

[Mooly]

Normal. DCR is what it says, the DC resistance. Impedance is an AC quantity.

(Try measuring the DC resistance of a large mains transformer primary. It could be as low as a few ohms which means it should draw zillions of amps... but it doesn't. The impedance at 50 or 60 Hz is much much higher).

 

[Galu]

JBL use 4 ohm woofers in those Control Monitors.

The statement that the speaker system is 8 ohm is misleading, 6 ohm would be a better representation.

 

[eriksquires]

Yes.

Get yourself Dayton DATS V3 or the DIY version from Room EQ Wizard. You'll find yourself doing a lot less head scratching.

 

[adason]

Specs Impedance 8 Ohm. DCR measured at 3.6 Ohm. Is that normal? I can confirm both speakers measured same value. No fault.

When you are using dmm to measure speaker, you are using dc current, not ac current. You are measuring at zero Hz. Result is much lower value.
To obtain correct speaker impedance, you have to use ac signal generator and millivoltmeter. You can use rew, or purchase dats.
Btw, speaker impedance while defined at lower point, can be quite high at Fs. See attached typical woofer.