Here you are. It’s vertical bi-amping.
The additional low-pass filter of lower than 100Hz is a feature in the bi-amplifier control—active crossover.
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Just looks like a standard 3 way to me.
The whole concept of a 0.5 way speaker is for the 0.5 way to add in an extra bass driver and filter it appropriately to compensate for baffle step losses that the speaker would normally present with.
2 way = one tweeter + one bass driver with crossover filtering that compensates for baffle step losses.
2.5 way = one tweeter and two bass drivers. The upper bass driver crosses over to the tweeter normally but does not have crossover filtering to compensate for baffle step losses. The second bass driver is filtered to come in much lower in frequency (like the ~400Hz you said for the B&W speaker) and fills in the baffle step losses of the upper bass driver.
A 3 vs 3.5 way is exactly the same concept. Somewhere in the design an extra driver is added to fill in the baffle step losses of the main driver for that frequency range. Without this extra driver it cannot be called 0.5 way.
The whole concept of a 0.5 way speaker is for the 0.5 way to add in an extra bass driver and filter it appropriately to compensate for baffle step losses that the speaker would normally present with.
2 way = one tweeter + one bass driver with crossover filtering that compensates for baffle step losses.
2.5 way = one tweeter and two bass drivers. The upper bass driver crosses over to the tweeter normally but does not have crossover filtering to compensate for baffle step losses. The second bass driver is filtered to come in much lower in frequency (like the ~400Hz you said for the B&W speaker) and fills in the baffle step losses of the upper bass driver.
A 3 vs 3.5 way is exactly the same concept. Somewhere in the design an extra driver is added to fill in the baffle step losses of the main driver for that frequency range. Without this extra driver it cannot be called 0.5 way.
Well, since there were so many answers and mostly different thoughts.
Then, could anyone please tell me what TRUE 3.5-way system should be like?
Then, could anyone please tell me what TRUE 3.5-way system should be like?
im also confused isnt a 3 driver speaker where 2 woofers are used for different frequency ranges just a normal 3 way speaker? i also dont quite understood the .5 way concept, i thought just some manufactors call for example a 2 way + passive radiator a 2.5 way speaker just to make it sound fancier to be honest 😀
Post #23
To my knowledge that extra woofer is always filtered with a single element, a large value coil/inductor.
The added woofer and filter not only adds bass down low but also adds power handling if I understand the concept correctly
To my knowledge that extra woofer is always filtered with a single element, a large value coil/inductor.
The added woofer and filter not only adds bass down low but also adds power handling if I understand the concept correctly
Only if your 3way is run full spectrum unfiltered, before the active crossover.
Nope not quite right I think.
The .5 woofer runs 20Hz to 100Hz or the baffle step frequency.
The .5 woofer runs 20Hz to 100Hz or the baffle step frequency.
I've seen people do a staggered approach too where the 0.5 woofer and the main woofer are fed by the primary woofer crossover. Then an additional inductor is added on top of the primary woofer xover to feed the 0.5 woofer.
This has the benefit of removing far more higher frequency stuff from the 0.5 woofer than just the inductor on its own would.
Is that the same as a cascaded/
I've done parallel 4R woofers connected to the third woofer [ again 4R] with a largeish coil in series with the third woofer but the primary woofer XO calculated on the total impedance of the triplet and simply guessing total impedance based on the DCR. Worked out OK
I've done parallel 4R woofers connected to the third woofer [ again 4R] with a largeish coil in series with the third woofer but the primary woofer XO calculated on the total impedance of the triplet and simply guessing total impedance based on the DCR. Worked out OK