+100 on the YES and the reasons why!
Figure the tuning of the box and set the HP maybe just a touch below that and lets bump the cutoff up to 24db.
A quick tuning test is to take a sweepable tone generator driving the system at lower frequencies and the frequency that has the least cone movement will be the tuned cabinet frequency.
I'm guessing it's going to be around 40hz.
Your over all box build looks good.
Figure the tuning of the box and set the HP maybe just a touch below that and lets bump the cutoff up to 24db.
A quick tuning test is to take a sweepable tone generator driving the system at lower frequencies and the frequency that has the least cone movement will be the tuned cabinet frequency.
I'm guessing it's going to be around 40hz.
Your over all box build looks good.
Final images of this version, will reuse the amp wheels etc. Fro when I have a chance to build v2.
So the frequency that seems to make the most volume for least movement in the lowest possible frequency?
Attachments
A big dip around 90, it was becoming uncontrollably hollow sounding at that point, may adapt later.
Tuning seems to fall around 34hz, which is where I see the lowest excursion of the driver, and most volume.
With EQ (Blue)
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It does really well for Pop, RNB, Hiphop and dance.
However the Kickdrum seems to fall very neatly in that 40hz~ range, that has a big dip... Hopefully its fixed in v2.
However the Kickdrum seems to fall very neatly in that 40hz~ range, that has a big dip... Hopefully its fixed in v2.
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Last update on this box. The venue was 20x35m wide or 700m2.
I was finally able to try it in a venue this weekend, and I was very happy with the result. At first I was worried it wouldn't be enough, and I am happy to report I was able to get a very resonable volume in the venue overall, and obviously more on the dancefloor. I do not have dB readings, but I would say in excess of 95DB 10-15 meters away, and people were able to talk near the back.
The amplifier surprised me in this manner, and was more than sufficient power for the RCF driver I recently installed. The sub has a lot more volume than I was able to use in this venue, with the volume at 11, clipping happens at 2, not that it means anything haha. I've yet reached clipping on the amp, without my ears bleeding, or the customers saying its too much.
Two new will be made soon, and I'm very excited to hear the smaller box and two of them coupling together.
I was finally able to try it in a venue this weekend, and I was very happy with the result. At first I was worried it wouldn't be enough, and I am happy to report I was able to get a very resonable volume in the venue overall, and obviously more on the dancefloor. I do not have dB readings, but I would say in excess of 95DB 10-15 meters away, and people were able to talk near the back.
The amplifier surprised me in this manner, and was more than sufficient power for the RCF driver I recently installed. The sub has a lot more volume than I was able to use in this venue, with the volume at 11, clipping happens at 2, not that it means anything haha. I've yet reached clipping on the amp, without my ears bleeding, or the customers saying its too much.
Two new will be made soon, and I'm very excited to hear the smaller box and two of them coupling together.
I would expect the RCF driver could gain another ~3dB of output with a larger amplifier in a (relativly) high tuned bass reflex. Some ideas on measurments: https://data-bass.com/#/articles/5cc0bc36a75a260004255c88?_k=l3rp3m
https://www.roomeqwizard.com/help/help_en-GB/html/impedancemeasurement.html
https://www.roomeqwizard.com/help/help_en-GB/html/impedancemeasurement.html
probably 35Hz is close to ideal? you can check in Hornresp using the maximum output graph that the box isn't excursion limited in its pass band.
FYI/FWIW/YMMV, etc., the pioneers designed prosound apps based on Vas/1.44, Fb = 1.56x Fs, vent area (Av) = Sd to ensure max high power output at low distortion for a given driver, so 32 Hz Fb = ~20 Hz Fs, but they were stuck with near zero Xmax and even though we now have incredibly higher performing drivers, amps, it's still a good plan IME to design accordingly with the downside of typically being pretty big if tuned low with high Vas drivers.
A high pass at 35Hz is hardly a subwoofer tho, now if you'd said 16Hz I agree
You should think about your bracing concept, I see nothing in your build that stops the walls from vibrating. Even as you mention braces, to be honest, there is nothing that has this function. As you started with a "no comment" woofer, no one saw the need to tell you. Now that you use a real PA chassis and plan to build an even larger cabinet, you should not repeat this mistake.
Vibrating panels smears the bass and reduce level. Maybe have a look how others do it. Don't fall for the trap "it has a large hole anyway, so why stiff walls?"
You may not get the point, but this is not a box but a resonator... it should only resonate out of the vent. You easily degrade the sound quality two classes by not bracing an enclosure. More wall thickness, believe it or not, doesn' help much. Good PA cabinets are often only made from 18mm ply, but strategically and carefully braced. That way you get maximum performance without too much wheight.
Vibrating panels smears the bass and reduce level. Maybe have a look how others do it. Don't fall for the trap "it has a large hole anyway, so why stiff walls?"
You may not get the point, but this is not a box but a resonator... it should only resonate out of the vent. You easily degrade the sound quality two classes by not bracing an enclosure. More wall thickness, believe it or not, doesn' help much. Good PA cabinets are often only made from 18mm ply, but strategically and carefully braced. That way you get maximum performance without too much wheight.