Thanks, Circlomanen for simulating the driver. Very nice of you!
It's hard on what kind of driver to chose (especially on a tight budget)
Found this one which is kinda cheap but seems to perhaps fit for this kind of enclosure?
JBL Club 1024 10" component subwoofer with switchable 2- or 4-ohm impedance at Crutchfield.com
Or is there something else in 8"-10" range for approx. 1000 SEK (100 EUR) which would do?
(Its available at BRL as well but they don't provide as many parameters)
Ok, will wait for the summer sale then
If you check ebay for used car subs you can get quite high performance units like the alpine type R for little money. (if your able/willing to collect).
Alpine Type R are nice drivers, but much to weak for this kind of enclosure.
Aim for a Qts of 0,3 or less. Below 0,2 is even better. Bl is king! B&C 18IPAL, Ground Zero GZNW 38NEO-SPL and GAS COMP12D1 are very good drivers for high powered high order QW bandpass enclosures.
GAS Alpha10D2 is a nice and suitable budget oriented driver. B&C 12TBX100 would be a great 12 inch alternative for professional use.
The geometry of a simple to build HROAR tends to favor drivers with low Qts and Vas and high Mms in order to keep the pipe cross section reasonably small, or it will take valuable volume from the Helmholtz front chamber. Isobaric loading of two drivers can be advantageous to increase Bl and Mms, but the large protruding magnets tends to get in the way when trying to get a good layout and a rational build without to many special solutions.
Aim for a Qts of 0,3 or less. Below 0,2 is even better. Bl is king! B&C 18IPAL, Ground Zero GZNW 38NEO-SPL and GAS COMP12D1 are very good drivers for high powered high order QW bandpass enclosures.
GAS Alpha10D2 is a nice and suitable budget oriented driver. B&C 12TBX100 would be a great 12 inch alternative for professional use.
The geometry of a simple to build HROAR tends to favor drivers with low Qts and Vas and high Mms in order to keep the pipe cross section reasonably small, or it will take valuable volume from the Helmholtz front chamber. Isobaric loading of two drivers can be advantageous to increase Bl and Mms, but the large protruding magnets tends to get in the way when trying to get a good layout and a rational build without to many special solutions.
This MCM driver has been mentioned many times in other configurations. It looks like a pair of these would fit the requirements for HROAR in a residential setting.
https://www.newark.com/mcm-audio-select/55-2421/8-high-excursion-woofer-120w-rms/dp/88C7835
https://www.newark.com/mcm-audio-select/55-2421/8-high-excursion-woofer-120w-rms/dp/88C7835
I noticed the B&C 18IPAL but would the 21DS115-8 work well in your design? If it did how would I design it to fit into an enclosure no bigger than 188cm wide x 69cm tall x 69 cm deep?
Edit: I am speaking of your 8th order bandpass to be clear.
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Here is the best I can squeeze into 69 x 69 x 188 cm.
A B&C 21DS115 is a bit to large to suit a 8th order QW-BP design within those limits.
The room gain profile of a concrete walled room will correct a lot of the falling response and it will probably play 16 Hz with furiosity if properly corner loaded.
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Here is the layout of the front resonator enhanced Tapped Pipe (8th order QW).
A very easy and straight forward build with only straight sections and 90 degree cuts.
I imagine the mouth venting out into a corner. With a 4,6 m/s air particle velocity at 130dB @ 18 Hz, port compression will be a non issue.
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Nice design! I still think it's a BP6S type enclosure.
The enclosure looks like a 2 step positive flare TH just like those ROAR enclosures.
