Hi! I need some help to make the speakers I have become usable!
I have some aiwa speakers that were originally meant to be bi-amped - the HF side should cut off around 200hz, with 200hz and lower going to the woofer in the speakers. I need to devise some sort of crossover or combination of HPF/LPF so I can drive these speakers with a standard non-biamp setup. Any ideas?
I've had a look at the crossovers sold on ebay/banggood etc but none are really designed for this purpose.
I have some aiwa speakers that were originally meant to be bi-amped - the HF side should cut off around 200hz, with 200hz and lower going to the woofer in the speakers. I need to devise some sort of crossover or combination of HPF/LPF so I can drive these speakers with a standard non-biamp setup. Any ideas?
I've had a look at the crossovers sold on ebay/banggood etc but none are really designed for this purpose.
SX-WNH999 - some details on the amp are here: Specification, Main unit cx-na999, Speaker system sx-wna999 | Aiwa NSX-A999 User Manual | Page 30 / 92
Thanks, the manual makes things clear.
Each speaker has a bass driver section that is separate from a mid/treble section.
The impedance figure quoted in the manual is 6 ohm, so you would need a two way, 6 ohm dividing network with a crossover frequency of 200Hz.
Unfortunately, to achieve this dividing frequency by passive means would require capacitor and inductor values which are too large to be practicable.
You will see what I mean if you check out this crossover calculator:
2-Way Crossover Calculator / Designer
Each speaker has a bass driver section that is separate from a mid/treble section.
The impedance figure quoted in the manual is 6 ohm, so you would need a two way, 6 ohm dividing network with a crossover frequency of 200Hz.
Unfortunately, to achieve this dividing frequency by passive means would require capacitor and inductor values which are too large to be practicable.
You will see what I mean if you check out this crossover calculator:
2-Way Crossover Calculator / Designer
Assuming the 'tweeter' is capable of it, I would try a simple first order crossover, at the baffle step frequency. As Galu says, it may require a large inductor.
Measurements required: width of the speaker box. Baffle step freq is 115/width in metres.
Driver impedance: usually at these frequencies driver impedance is close to Re, so measure the DC resistance of both drivers. Then plug the above values into the calculator that Galu linked, and there's most of your answer. You may also require a resistor in series with the tweeters to balance the levels of the drivers.
Measurements required: width of the speaker box. Baffle step freq is 115/width in metres.
Driver impedance: usually at these frequencies driver impedance is close to Re, so measure the DC resistance of both drivers. Then plug the above values into the calculator that Galu linked, and there's most of your answer. You may also require a resistor in series with the tweeters to balance the levels of the drivers.
Thanks, Pete.
The baffle width is 0.24m, giving a baffle step frequency of 479Hz.
This is the frequency which Pete suggests you plug into the calculator.
The baffle width is 0.24m, giving a baffle step frequency of 479Hz.
This is the frequency which Pete suggests you plug into the calculator.
Assuming 6 ohm impedances, I make that an inductor of standard value 2.0mH in series with the bass driver and a capacitor of standard value 56uF in series with the mid/tweeter.
That's certainly manageable!
That's certainly manageable!
