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100 Hz High Pass 8 Ohm Crossover
Phase shift question
I want to use these to protect a line array of 9 full range drivers, that I currently have wired in a serial/parallel config to yield 8 ohms for the total tower. I read the attached info about using passive crossovers, and need some guidance on how I should wire in the 266-462 High Pass crossover. When they talk about wiring the speakers 'out of phase', are they referring to the wiring between the amp and the total array, or do I have to also be concerned with how I've wired my speakers to each other within the array? Passive crossovers have another drawback, that is ignored most of the time for practical purposes: They introduce phase shifts, which put voltage and current out of phase with respect to each other, affecting delivered power to the speakers and affecting overall speaker "timing". A 6dB/Oct crossover has a phase shift of 90 degrees, 12dB/Oct = 180, 18dB/Oct = 270, 24dB/Oct = 0. Try to stay with even-order crossovers. If you have a 180 degree shift (2nd order crossover = 12dB/Oct, hook up the speakers out of phase (+ to - and - to +).
It sounds like you're trying to over think things. The first question is how much power are you going to put into the array? If the speakers in the shortest series chain don't see enough power to get even close to their limits, then no further protection is necessary. For example, I can happily run my fostex full ranges, one driver per channel (rated 15 watts; 40W max) in a minimal bass-reflex cabinet without protection and the worst thing that's ever happened to them is that I bottomed them out playing bass. (not good!), I simply turned down the volume and they've worked great ever since. I'm using them in my home theater system where the receiver is crossing them over at 150 hz. In your situation, if protection really is necessary, assuming the amplifier is in good working order; I would look at line level "bass blocker" products. (see below); they would install between the pre-amp and the amp. Only if that weren't possible would I consider adding a capacitor (first order filter) in line with the speaker wiring. Or, again this product...
Date published: 2012-07-07
Work with crossed over 2 ways?
added a sub to my home system and would like to use my 6.5" 40hz 2 ways for mid bass. can I use this in conjunction with crossed over 2 ways?
Yes this can be wired before the 2-way speaker to act as a high pass filter.
Date published: 2013-02-26
This will be mounted in 15/ 4-6 4ohm bass guitar cabinet. I would like to run this on the 4-6's only (8ohm wired in series paralell). I read some comments on your sight and just wondering, can I use just one? Thanks, Al
Yes only one crossover is necessary for multiple drivers if wired in series/parallel.
Date published: 2014-02-20
what would cross-over be with 6 ohm speakers?
This will have a crossover point of roughly 150 Hz at 6 ohms.
Date published: 2014-03-07
Do I need a crossover for each speaker?
Yes, generally speaking. With the exception of full range drivers, any speaker in a 2-way, 3-way, or other component system should have its own crossover.
Date published: 2011-06-23
i am running to 4 ohm speakers in series to create and 8 ohm load. Do I only need one of these between the amp and the speakers or does each speaker need a 4 ohm filter? Thanks
You will only need one of these for both drivers.
Date published: 2014-04-15