There is something magical about voices on ZRT that keeps pulling me back. I just need to figure out the port, the current one seems too small (4.6x55mm). Any port size/tuning recommendations? I think it's currently tuned a bit low. I have a resin 3D printer that can do any vent shape and size.
It would pay off to measure impedance of one raw woofer (both) free air, and then simulate reflex loading.
Increase your power to check port velocity, ensuring you keep within say 17m/s at max expected power. I'd expect 2 6.5 inch woofers loading the same enclosure to need at least a 7cm diameter vent to avoid chuffing at high power
Normally "undertuned" boxes (Low Fb) have the left peak lower than the right.
Normally "undertuned" boxes (Low Fb) have the left peak lower than the right.
Max internal diameter with rounded edges I could print is 6cm. In the end, I might just go for 65L box to reach that low end...
It would be helpful if you can directly answer questions . Failure to do so will cause people to disengage and stop helping you
4cm foam on top and back, 1cm on sides, 15cm wool at the bottom.
I guess the main question is if ZD5 low end performance can be reached with two 7inch revelators in 38L in any 2.5 configuration, or should I be looking at 65L box?
I guess the main question is if ZD5 low end performance can be reached with two 7inch revelators in 38L in any 2.5 configuration, or should I be looking at 65L box?
Do the sims at 65L and publish them.
It might be interesting to see the VituixCad responses of both boxes with the ports adjusted to give equal impedance peaks. Hopefully the the bass peak will flatten and the group delay will not rise so abruptly.
It might be interesting to see the VituixCad responses of both boxes with the ports adjusted to give equal impedance peaks. Hopefully the the bass peak will flatten and the group delay will not rise so abruptly.
See the box "Number" in the Vent section
CLosed box 38L heavy stuffed (brown line is including baffle step - width 22cm) /Qtc is 0.6
BR 65L wall stuffed tuned at 30Hz / 2 vents 6x23cm with 2 flanged ends very similar to a standard SBB4 (brown line is including baffle step - width 22cm)
CLosed box 38L heavy stuffed (brown line is including baffle step - width 22cm) /Qtc is 0.6
BR 65L wall stuffed tuned at 30Hz / 2 vents 6x23cm with 2 flanged ends very similar to a standard SBB4 (brown line is including baffle step - width 22cm)
What I was suggesting although not described that clearly was model one box at 38 litres and size the port to give equal peaks and save that sixpack and attach the data and repeat at 65 Litres obtain equal impedance peaks by adjusting port length and attach the file.
For your own interest you could try adjusting the Vituixcad reflex box types form SBB4, BW etc and see how they modify response and Group delay.
For your own interest you could try adjusting the Vituixcad reflex box types form SBB4, BW etc and see how they modify response and Group delay.
Should driver configuration be parallel or series, since it's neither (2.5 way)?
The enclosure simulation as you rightly point out doesn't have a 2.5 way button.
Its a great tool to help you see what the enclosure size and type types can give you for a driver or multiple drivers. Its provides lots of very useful information. Personally I would use the parallel option to give you a feel for what you can achieve as both woofers contribute at the low end. Your real box will exhibit slightly different performance and impedance characteristics due to the inductor inserted before the 2nd woofer.
Test boxes can be built and measurements taken and loaded to the main program to give you the combined response and allow you to design the crossover
Its a great tool to help you see what the enclosure size and type types can give you for a driver or multiple drivers. Its provides lots of very useful information. Personally I would use the parallel option to give you a feel for what you can achieve as both woofers contribute at the low end. Your real box will exhibit slightly different performance and impedance characteristics due to the inductor inserted before the 2nd woofer.
Test boxes can be built and measurements taken and loaded to the main program to give you the combined response and allow you to design the crossover
Have you tried EQ on the sealed enclosure? It should respond pretty well. It might make you feel better knowing the drivers are capable of the bass you want. It's not very clear what you're after though. Do you just want more bass than the 5" Revelator or are you expecting the room to shake?
Also, before you build a 68L enclosure, what about buying or building the 2 way crossover and plugging the lower woofer hole? The two way design should have more bass output than the ZD5.
I keep reading this thread because I have a similar build right now. Mine is the same 18W8531G00 woofer in 33L @35Hz as I posted before. The bass output is definitely more than my build with a 15W4531G00 in ~9.5L @ 50hz which isn't too far from the ZD5.
Also, before you build a 68L enclosure, what about buying or building the 2 way crossover and plugging the lower woofer hole? The two way design should have more bass output than the ZD5.
I keep reading this thread because I have a similar build right now. Mine is the same 18W8531G00 woofer in 33L @35Hz as I posted before. The bass output is definitely more than my build with a 15W4531G00 in ~9.5L @ 50hz which isn't too far from the ZD5.