This is what confused/ set me back on the dual driver path.
So, push-push is the way to go, dual opposed / in phase.
The activbe reaction cancelation dramatically reduces the vibrationa ,energy transmitted to the box structure by a large amount (say from 100% for 2 front mounted 10s, to less than 10% push-push [educated guess]).
dave
dave
Me too!
Suspensions have some non linearity/stiction, increasing with increasing excursion, so by inverting one, the two ~average out, reducing the even order harmonic distortion we are most sensitive to (think acoustic version of push-pull/Class A amp design), otherwise it's just a basic/'Plain Jane' BP4 by the 'looks' of it.
IOW, do you prefer a PP amp with its 'nasty' -fB or prefer Class A's sonic purity?
Not true! Sorry Dave for that...ahah ha!
One of my first mature (ahahah ha) projects (ahahahaaaa!) started with four Ciare hw 159...I guess... after long studies (same crowd at sitcoms, laughing) for their q/p (....)
Ok, still have 2 of them (hopefully, in the basement), 'coz one was broken. Guess: it was the inner woofer of an impractical push pull where the bottom was removable and the section was manageable. Err..need little fingers!
So power suction from amplifier with economic drivers might lead to failure
The project followed the first, same box with 4 old woof... those old paper membrane thingies ..Er, no, in reality they were cheap boxes for parties with two drivers for 10-20 W power - enough for the kids, and those had good basket painted grey, and paper..the sticky suspension with dust...and so and so, they were great in PP!! I think they lasted 2-3 days...
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A linear woofer will not have push-pull make any difference (ref Nick McKinney),
Remove too much second, and you aren’t masking the third any more.
dave
Remove too much second, and you aren’t masking the third any more.
dave
Now it reminds me the little TB woofers (subs) with plastic baskets and adviced as using propietary dual membrane in isobaric something?;
But my excursion with paper cones in push-pull was just to say: it's old way of making a little more fuller bass...
But my excursion with paper cones in push-pull was just to say: it's old way of making a little more fuller bass...