Partnered Output Coils - Free Energy

[conradelektro]

A question concerning 4 Ohm to 16 Ohm speakers:

My mono audio amplifier is built for a 4 Ohm to 16 Ohm speaker at the output.

Naturally I want to wind a coil (primary for a partnered output coil) that has e.g. 4 Ohm or 16 Ohm (like a 4 Ohm or 16 Ohm speaker).

What does 4 ohm in a speaker mean?

Is that 4 Ohm DC resistance of the coil in the speaker?

Or is it a Z of 4 Ohm at a specific frequency? Z = electrical impedance (magnitude an phase)

Greetings, Conrad

[Cap-Z-ro]

Brian:

There is always a root cause for a thread going haywire.   That is the root cause for the problem.

MileHigh

Succinctly stated by a root cause.

Regards...

[MileHigh]

Succinctly stated by a root cause.

Regards...

In your skewed brain "asking questions" becomes "attacks."  You are haplessly trapped in your spin zone.

And I chuckle because you let it slip that you want Chris as another one of your guinea pigs.  Let him haplessly play with transformers for another five years instead of attending to more important priorities like his family.  You get the smug satisfaction.

[MarkE]

A question concerning 4 Ohm to 16 Ohm speakers:

My mono audio amplifier is built for a 4 Ohm to 16 Ohm speaker at the output.

Naturally I want to wind a coil (primary for a partnered output coil) that has e.g. 4 Ohm or 16 Ohm (like a 4 Ohm or 16 Ohm speaker).

What does 4 ohm in a speaker mean?

Is that 4 Ohm DC resistance of the coil in the speaker?

Or is it a Z of 4 Ohm at a specific frequency? Z = electrical impedance (magnitude an phase)

Greetings, Conrad

An audio amplifier is not required to respond down to DC although most do.  The amplifier is usually specified for a maximum total harmonic distortion over some frequency range.  The standard is 20Hz - 20kHz.  The speaker impedance is important in two ways:  Speakers outside the impedance range can result in excess distortion.  Speakers that are too low of an impedance can cause the amplifier to overheat.

The DC resistance of the speaker will tend to be lower than its rated impedance.  BEMF from a given driver resists current flow from the amplifier raising the effective impedance.  The inductance of the speaker winding and the mass of the moving speaker parts: primarily the cone in a woofer or midrange raise impedance with increasing frequency.  However, there is feedback with the speaker housing that complicates the response and results in at least one dominant resonance unless the speaker enclosure has been designed as a wave guide.

[MileHigh]

Conrad:

Speaker impedance curves (impedance vs. frequency):

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