Hi.
I need help figuring out the port size that would be required for a series 6th order bandpass box with a custom sundown nsv3 18.
I don't have the specs yes, but I have been using the parameters for the nsv4 18d1 found on sundowns own site. I'd think this is rather close and I'll have to re design the box anyways.
I just need to know if I'd have space for a 6th order in my trunk at all.
I have modeled that a 200-250l ported enclosure tuned to 25-30Hz should just fit. That is what I'm going with if I can't fit a 6th order.
The problem is I have 8kw rms of power and I need a very large port for this.
In the ported design I can get the port air velocity down to about 30-35 m/s, which I think is pretty good for that much power.
I'll be using a 20Hz HPF or something to control the xmax to 45mm.
Now I have tried to design a series tuned 6th order in hornresp.
I have a start with 160l front chamber and 80l rear chamber.
With the rear chamber tuned to 25-30hz and the front chamber to around 70hz.
The goal is to get more sensitivity and a wider frequency range with the 6th order, as this is going into a car, that will boost the lows maybe 15dB+. So I want the hard hitting lows with a little more highs for a flatter response.
But when I have a good looking frequency graph in hornresp, the port air velocities are through the roof. like 60-80 m/s, and seem to need upwards of 3000sqcm of port area to get it down even a little bit.
I don't care about chuffing because I can't hear that in the car. All I want is a nice response that doesn't get too much port compression at 8kw.
How high of an air speed can I have for this alignment? I need to stay under about 350l of total air space for the enclosure, maybe even more like 300l.
I need help figuring out the port size that would be required for a series 6th order bandpass box with a custom sundown nsv3 18.
I don't have the specs yes, but I have been using the parameters for the nsv4 18d1 found on sundowns own site. I'd think this is rather close and I'll have to re design the box anyways.
I just need to know if I'd have space for a 6th order in my trunk at all.
I have modeled that a 200-250l ported enclosure tuned to 25-30Hz should just fit. That is what I'm going with if I can't fit a 6th order.
The problem is I have 8kw rms of power and I need a very large port for this.
In the ported design I can get the port air velocity down to about 30-35 m/s, which I think is pretty good for that much power.
I'll be using a 20Hz HPF or something to control the xmax to 45mm.
Now I have tried to design a series tuned 6th order in hornresp.
I have a start with 160l front chamber and 80l rear chamber.
With the rear chamber tuned to 25-30hz and the front chamber to around 70hz.
The goal is to get more sensitivity and a wider frequency range with the 6th order, as this is going into a car, that will boost the lows maybe 15dB+. So I want the hard hitting lows with a little more highs for a flatter response.
But when I have a good looking frequency graph in hornresp, the port air velocities are through the roof. like 60-80 m/s, and seem to need upwards of 3000sqcm of port area to get it down even a little bit.
I don't care about chuffing because I can't hear that in the car. All I want is a nice response that doesn't get too much port compression at 8kw.
How high of an air speed can I have for this alignment? I need to stay under about 350l of total air space for the enclosure, maybe even more like 300l.