SIMPLE subwoofer crossover?

[Eva]

If noise is your major complaint, don't panic There are plenty of low-noise op-amps and low-noise design techniques (not to mention that the former are useless without the latter).

 

[olumayor]

seriously, i need a good crossover for my DIY amp for a freq of 100hz

 

[revboden]

miniDSP.

 

[audiobomber]

for all of us who use two-channel systems with subwoofer(s), there is no good way to integrate them in the system without running the speakers full range (bad idea if they aren't full range speakers), running through the subwoofer's crossover (mediocre quality at best, IF available), etc.

I use the Marchand XM46 for the high pass at 80 Hz, second order. This slope combines with the natural rolloff of my sealed main speakers to provide an LR4 crossover. I replaced the two generic caps in the XM46 with a single Audiocap for improved sound. I cannot hear any degradation from this filter. I use a Marchand XM44 for the subs, with a Linkwitz transform and infrasonic filter.

You could try this out for not much money. I think I paid just over $100 for the second-order XM46, and you already have an XM9 for the sub. If your main speakers are ported, stuff the ports first.

 

[audiobomber]

I replaced the two generic caps in the XM46 with a single Audiocap for improved sound.

I meant to say Auricap. For those who don't know, the Marchand XM46 is a passive line level crossover.