Looking for info on Dual 4th Order Bandpass for Polk db840dvc drivers
neur0tic
Posts: 3
I'm not entirely familiar with 8" subwoofers, but I recently bought two
Polk db840dvc subwoofers for my Audi, and I would like to build a 4th-6th Order bandpass Enclosure for the two subwoofers since my car is a hatch and I tend to prefer bandpass sound.
I will be using 2 channels of a Zapco Reference Series 1000.4 amplifier to power them; with Voice Coils wired in parallel, each SW will produce a 2 ohm load (Zapco Ref 1000.4 is rated @ 250w per channel with a 2ohm load).
Side Note**
The front two channels pwr Focal Utopia 6.5" 3-way Components in the Doors.
I'm looking to find out if there are any enclosure specs out there for such a box (Bandpass for 2 x db840dvc subwoofer drivers); that would make things much easier.
Polk db840dvc subwoofers for my Audi, and I would like to build a 4th-6th Order bandpass Enclosure for the two subwoofers since my car is a hatch and I tend to prefer bandpass sound.
I will be using 2 channels of a Zapco Reference Series 1000.4 amplifier to power them; with Voice Coils wired in parallel, each SW will produce a 2 ohm load (Zapco Ref 1000.4 is rated @ 250w per channel with a 2ohm load).
Side Note**
The front two channels pwr Focal Utopia 6.5" 3-way Components in the Doors.
I'm looking to find out if there are any enclosure specs out there for such a box (Bandpass for 2 x db840dvc subwoofer drivers); that would make things much easier.
Post edited by neur0tic on
Comments
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does Winisd have any info for you ?
Winisd is a free online speaker builders guide .. -
Do you have a link?
Thank you for the response btw -
Got it... thank you.
I will check it out. I hadn't realized that existed; i'm used to doing all the calculations manually... tedious task. thank You -
nothing is greater than seeing what your speakers response is before you build , I have waisted lots of wood , plus it free ..
I use 2 teelve inch mtx 5500 in a clameshell isoberic I would have tried a bandpass but most I found are too picky and the bass in a very limited frequency range so the cabinet is 3.5 cubic and drops only 9 db at 20 hz w/300 watts .
What I did on winisd being is try differant volumes to see what is the min and max to get the low end w/out tons of power , I could have made it smaller but I would need a bigger amp w/bass boost (try tuning that) ..
