If ONE 8 ohm woofer is used with ONE 8 ohm fullrange with only an inductor as low pass on woofer, will that not present an 8 ohm load to the amplifier and be considered a first order 2 way system? I simply want to add a 2nd 8 ohm woofer as a helper woofer with another inductor at a lower frequency (100hz) to create a 3 way first order system with an 8 ohm load to amplifier? I don't think it is about wiring in series or parallel but dividing the signal from the amplifier 3 ways like a branch of a tree: lst branch is through inductor 1 to woofer 1; 2nd branch goes through inductor 2 to woofer 2 and 3rd branch goes directly to fullrange driver. Why will this not work?
Because your full range driver is way too sensitive compared to your woofers.
Yes, this takes care of part of the problem, but your drivers would still benefit from being crossed so they work together acoustically.
About your first question and the inductors, they disappear at low frequencies. This makes all the woofers work together. What you want to do is to prevent the other drivers covering the same frequency range because this is the way the amp sees it too. For example, both a cap and a coil.
About your first question and the inductors, they disappear at low frequencies. This makes all the woofers work together. What you want to do is to prevent the other drivers covering the same frequency range because this is the way the amp sees it too. For example, both a cap and a coil.
Note: typing while AllenB posted.
ntell, please listen.
In order to protect your amplifier and the driver itself, you should put a cap on the FR unit. With two 18" providing the bass, there's no purpose in having the FR attempt it as well. In fact, it is likely to take away from the system in more than one way.
Second, two 18's will most often have a higher power handling than a single 12" FR. Don't take away from them by sacrificing the FR
Third, you should consider going smaller with the FR unit. It will have better highs and better dispersion.
Please do a little research on this before you post again as your kick-back flies in the face of speaker common sense.
I think I understand what you are looking for, trust me. Please listen to those in the know. Funny thing is, I am not one of those really. I often look to the diyAudio members to assist me. My term speakerholic is as accurate as it gets. All in and then deal with the consequences.
Cheers.
ntell, please listen.
In order to protect your amplifier and the driver itself, you should put a cap on the FR unit. With two 18" providing the bass, there's no purpose in having the FR attempt it as well. In fact, it is likely to take away from the system in more than one way.
Second, two 18's will most often have a higher power handling than a single 12" FR. Don't take away from them by sacrificing the FR
Third, you should consider going smaller with the FR unit. It will have better highs and better dispersion.
Please do a little research on this before you post again as your kick-back flies in the face of speaker common sense.
I think I understand what you are looking for, trust me. Please listen to those in the know. Funny thing is, I am not one of those really. I often look to the diyAudio members to assist me. My term speakerholic is as accurate as it gets. All in and then deal with the consequences.
Cheers.
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Ok guys. I will look elsewhere as Pure Audio Project Trio series seems to have done what I am trying to do with 2 large woofers, 1 full range driver and a 2 way first order crossover yielding exceptional results! I will give up on the 3 way and focus on the 2 way design that they use. Thanks for everyone's input.
I would call that a 'quarter section, series' circuit.
Component values for 12 ohm (the average of your 8 ohm full range and 16 ohm series woofers) would be around 6mH and 28uF at a crossover frequency of 400Hz.
The difference in sensitivity betwen the full range and the woofers would still be a problem.
Impedance seen by amp would be no less than 8 ohm in your case.
Component values for 12 ohm (the average of your 8 ohm full range and 16 ohm series woofers) would be around 6mH and 28uF at a crossover frequency of 400Hz.
The difference in sensitivity betwen the full range and the woofers would still be a problem.
Impedance seen by amp would be no less than 8 ohm in your case.
Note that ntell already has the drivers and states their sensitivities in post 12.
I wonder what power rating the L-pad resistors would have to be to safely match the higher sensitivity full range with the woofers?
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