So I've got some inexpensive pro style drivers with relatively high efficiency. Of course that's kind of at mid band, rather than out at the edges.
I've got measurements loaded into Xsim and I'm naturally trying to flatten things out and as a result I've got a big impedance rise around 2 kHz. 60-ish ohms in one version of the XO design, over 130 in another. I'm still playing around with the design.
Is that a problem for amps? Perhaps it's more a question for the amp builders than the speaker builders. I've heard things like a very reactive load can be difficult for an amp. Tube amps sometimes have different output taps for different impedance speakers. Switching amps have output filters that are optimized for a given impedance. On the other hand saving some current driving a higher impedance is maybe nice. As a highish efficiency woofer in a vented box there's naturally a couple of impedance peaks down low, that happens all the time people don't seem to sweat it.
What makes an easy load? Is low impedance the only thing that makes a difficult load?
Since it's right there in the sim putting an impedance equalizer circuit in is easy enough. Waste of time, or worth doing?
I've got measurements loaded into Xsim and I'm naturally trying to flatten things out and as a result I've got a big impedance rise around 2 kHz. 60-ish ohms in one version of the XO design, over 130 in another. I'm still playing around with the design.
Is that a problem for amps? Perhaps it's more a question for the amp builders than the speaker builders. I've heard things like a very reactive load can be difficult for an amp. Tube amps sometimes have different output taps for different impedance speakers. Switching amps have output filters that are optimized for a given impedance. On the other hand saving some current driving a higher impedance is maybe nice. As a highish efficiency woofer in a vented box there's naturally a couple of impedance peaks down low, that happens all the time people don't seem to sweat it.
What makes an easy load? Is low impedance the only thing that makes a difficult load?
Since it's right there in the sim putting an impedance equalizer circuit in is easy enough. Waste of time, or worth doing?
Any decent solid-state amplifier won't care about high impedance areas. Valve (tube) amps might.
A difficult load will usually have low impedance regions, often combined with steep phase angles.
Impedance compensation can be useful at times, but for short-ish cable runs and sensible amplifiers, not necessary.
Chris
A difficult load will usually have low impedance regions, often combined with steep phase angles.
Impedance compensation can be useful at times, but for short-ish cable runs and sensible amplifiers, not necessary.
Chris
You might want to take a look at this.
https://assets.ctfassets.net/4zjnzn...ments_of_High-quality_Loudspeaker_Systems.pdf