Finding (calculating?) speaker and amp impedance


I'm starting to understand why speakers with high efficiency and perhaps more importantly a flat impedance curve work well with tube amps.

If not published by the vendor/manufacturer, is there a way to determine the impedance curve from the specs that are provided?

Also, I have a pair of Magnepans that need high current amplification.

Is there a way to determine the current of an amplifier from vendor/manufacturer provided specs?

Thanks everyone!

hleeid

Someday, equipment makers will do what Technics does and employ something like their LAPC function which "looks" as the speaker impedances with a series of test tones and adjusts the amps output to match it as closely as possible.

Other makes must have done something like this as well (I can't recall any at the moment) but it can be done, simplifying the matter, somewhat.

All the best,
Nonoise

Technics does and employ something like their LAPC function which "looks" as the speaker impedances with a series of test tones and adjusts the amps output to match it as closely as possible.

 

@nonoise

I must admit that this is a pretty cool application, but kind of limited in benefit. Perhaps the biggest benefit is to switching amps which tend to suffer (relatively) high output impedances at high frequencies.

 

 

 

@erik_squires 

Every little bit helps. And, if done enough times by manufacturers, someone else will eventually come up with a better mousetrap.

All the best,
Nonoise

@nonoise True, but you also have to then accept the ADC / DAC of the amp. If you want to keep an analog chain after that DAC you spent 2 years pickinmg out this tech is wrong for you. :)

@erik_squires , I have zero issues with the sound of the amp and it's internal ADC/DAC. To my way of thinking, that's way overthinking the problems one might encounter 2 years down the line. I've never been into the DAC flavor of the month club. 

All the best,
Nonoise