realizing a D'appolito crossover with DSP

[diyiggy]

Thanks Allen,

I am not sure to understand if there is +6 dB sensivity like the // woofers cabling or if the WWT with two coils just permits not to drop below the nominal sensivity of the drivers by filling the baffle step loss ?

Illustating for more clarity : my 5.5" drivers are 87 dB sensivity and by // them (WTW) I can have 93 dB sensivity, And assuming 3 to 4 dB of baffle step in a living room environment (in spite off the fully copensated - 6/7 dB baffle step loss), one has still 89 dB sensivity at the end.

But with WWTand my 5.5" 87 dB drivers, I only expect a flat 87 dB dB sensivity with the two serie coils ? .... And still the lobbing of the tweeter as illustrated in this thread ?! The lower woofer is also excursing more in the lows than a // conf.

Or do I simply don't understand the power summation of the WWT configuration ?

 

[AllenB]

or if the WWT with two coils just permits not to drop below the nominal sensivity of the drivers by filling the baffle step loss ?

This one.

The lower woofer is also excursing more in the lows than a // conf.

Both MTM and TMM use all woofers for the bass.

But with WWTand my 5.5" 87 dB drivers,

Both are the same if you do 6dB baffle step. With 2.5 way you have to do 6dB. With TMM you don't have to do 2.5 way, so you can do partial baffle step with TMM.

 

[AllenB]

You can still do a 2.5 way TMM and have partial baffle compensation, you just need to tune it...

Here it is done by raising the level of the tweeter.

..and here it is done by holding the lower woofer response up until the cross.

 

[diyiggy]

Thanks Allen for the tips.