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Re: Tired of Behringer

Posted by b.l.zeebub (A) on May 17, 2006 at 07:13:17

In Reply to: Re: Tired of Behringer posted by Zene on May 16, 2006 at 17:51:52:

If there is anything to be gained by other slopes depends on your drivers.
As long as they cross to each other well within their flat response limits I can't see how you could gain anything by using different slopes. After all 24dB LR's are so widespread because they are pretty much the only ones producing a flat output and no phase shift whilst maintaining a decent impulse response (you may not be able to measure this with a hardware RTA but possibly with more advanced software ones). The reason they are not widely used in passive designs is that steeply sloped passive xovers tend to 'ring' (self-oscillate) due to being made up from inductor/capacitor (LC) circuits and as such resonate at the crossover frequency producing a surprisingly clean sinewave which is, unfortunately, entirely unrelated to any music you might be trying to listen to.
But anyway, unless your drivers demand a certain overlap you may well end up creating problems where there wheren't any by choosing other slopes.

Any phasing issues should be addressed by having the voice coils in the same plane!
A crossover is not the place to try to fix basic design deficiencies...
If it is impossible to get them in the same vertical plane tweeter coils should be further back from the listener then woofer coils!!! The reason being that fundamental tones should reach the ear before their harmonics because if the brain detects harmonics first it actually synthesizes a suitable fundamental. So a late arriving fundamental does play a major part in listening fatigue, something many people try to solve by rolling off the treble. A case of treating the symptom not the cause.

Can't say anything about Rane but the BSS can be used as either 2way stereo or 3/4way mono, the KT as two 2way stereo or 3/4stereo. Both with all the necessary band passes perfectly executed but you will have to flick a switch to tell in which mode to operate...

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