Passive Crossovers

[Techno Commander]

Anyone know of anyone that builds passive crossovers?

Or any suppliers of "decent" 2 way boards?

I need a pair of 50Hz, 24db, 200W crossovers. Although, I may get away with 150W ones.

[Ali Tait]

How about going active with a Behringer? You could get a CX3400 for about 70 quid.

[Reid Malenfant]

I need a pair of 50Hz, 24db, 200W crossovers. Although, I may get away with 150W ones.

Andy, forget it m8

Do you have any idea how big the inductors would be? Bloody huge m8 Each crossover would be enormous, the capacitors would need to be huge as well

Go active like Ali says, it'd probably work out about a tenth the price

[Techno Commander]

Hmmmmm.................

12db slope might work. Its hard to go active with an integrated.

[Welder]

It could be done
Your biggest inductor would be around 72mH which is big, but not impossible.
I’ve wound a 60mH before
The main problem comes with the caps (480uF something) looking like your largest value. A 5 cap build with say
http://www.parts-express.com/pe/psho...Number=027-447

So, no it isn’t quite as ridiculous as it would first seem but it will cost and it will be a very big build

[Reid Malenfant]

It could be done
Your biggest inductor would be around 72mH which is big, but not impossible.

Not impossible no But to get the resistance as low as possible to actually make the thing worthwhile ferrites are out of the window & you'll need to be looking at E & I laminations on something like a 200VA transformer core with the EI gapped to avoid saturation. So that 4 lots of 200VA transformer cores & bobbins (assuming a stereo crossover) as well as the capacitors

[Ali Tait]

Prolly cheaper to buy another amp and go active.

[Welder]

Go on Mark, you know you wanna give it a try
Wind the inductors for him and he’s in business.

[colinB]

Why is it hard to use active sub with an integrated? Or did i miss read something

[Reid Malenfant]

Why is it hard to use active sub with an integrated? Or did i miss read something

It's not, you just use the speaker output of the integrated to feed to the active crossover through a resistor divider network to lower the voltage, done it loads of times