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Checking with meter [message #17762]

Mon, 25 April 2005 18:11

adavis464
Messages: 64
Registered: May 2009

Viscount

I get 7.5 ohm reading that does not seem like a 16 ohm driver?Is this correct for a 16 ohm driver.I don't think so help

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Re: maybe [message #17764 is a reply to message #17762]

Mon, 25 April 2005 21:10

tomt
Messages: 40
Registered: May 2009

Baron

what driver is it?

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Re: Checking with meter [message #17765 is a reply to message #17762]

Tue, 26 April 2005 03:39

Wayne Parham
Messages: 18791
Registered: January 2001

Illuminati (33rd Degree)

When you measure with a meter, what you see is DC resistance and that's only part of impedance. The other part is voice coil reactance, and that won't show up on a meter. Typical DC resistance value for an 8 ohm driver is 4-6 ohms, for a 16 ohm driver it's usually 8-12 ohms. Some are a little higher or lower.

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They are marked jbl 2440 16 ohm [message #17767 is a reply to message #17764]

Tue, 26 April 2005 10:32

adavis464
Messages: 64
Registered: May 2009

Viscount

Hi tomt With original diaphrams Regards Tim

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For example... [message #17768 is a reply to message #17765]

Tue, 26 April 2005 10:51

GarMan
Messages: 960
Registered: May 2009

Illuminati (2nd Degree)

Couldn't find the specs for 2440, but according to JBL specs, the 2445J has DC resistance of 8.2 ohms, +/- 10%. A 7.5 reading would be within spec for this 16 ohm driver.

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