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Speakers in parallel

Printed From: Graham Slee at Hifi System Components
Category: And the rest
Forum Name: Transducers, Speakers, Mics...
Forum Description: Interested in bi-amping, tri-amping, crossovers, speaker design, miking techniques, EQ - the list goes on
Printed Date: 01 Jun 2020 at 10:14am
Software Version: Web Wiz Forums 12.01 -

Topic: Speakers in parallel
Posted By: Ash
Subject: Speakers in parallel
Date Posted: 05 Jun 2019 at 3:07pm
Question time.

What will happen to the frequency and phase responses of two identical speaker drivers (for example, two Alpair 12P) if they are connected in parallel directly from the amp? Will one speaker act as a parallel inductor to the other speaker, causing a high pass or low pass effect?? I guess the sloping of whatever effect would be quite shallow in gradient as they are similar electromagnetically? I don't understand the physics behind what inductors and capacitors do relative to electron oscillation frequency so I am quite clueless.

Asking as thinking of pairing a 12P full range and 12PW woofer together in a single enclosure design. I would like to mostly preserve their individual responses whilst just using one pair of Proprius. Thinking of having 12P on-axis to ears and the PW facing off-axis for bass support. The slightly higher sensitivity of the P should work in my favour as I only want to hear the response of the PW in the frequency areas that the P is lacking SPL.

Posted By: Ash
Date Posted: 05 Jun 2019 at 3:26pm
Inductive low-pass filter = inductor in series with load?
Capacitive low-pass filter = capacitor in parallel with load?

Inductive high-pass filter = inductor in parallel with load?
Capacitive high-pass filter = capacitor in series with load?

Resistors have no effect on frequency response as they are essentially "equal-pass" and no phase shift as neglible capacitance and inductance? Only affect signal amplitude?

Posted By: Graham Slee
Date Posted: 05 Jun 2019 at 4:19pm
I would think it would be the same as paralleling two transformer windings. I expected half the inductance but measured the same as just one winding. I ran it by my transformer designer and he confirmed it, but I forgot what exactly he said now in explanation.

Not simple enough for Google-Bot to understand...

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