The sweeps always start at 0hz regardless of where you set the sweep range. At least this is the case for using a 10hz start setting in REW.The amp will likely give in before the drivers. I would ensure your sweeps start at 10 hz and not 1 to help remove possible issues related to that.
There you go with excursion again :rant: lol. As you reach tune and output transfers from driver to port, the driver excursion is actually reduced. Well designed ported subs like yours wont show full excursion around tune until you hit very high levels, and these drivers can play at levels higher than the particular amp you have can run .Dan,
Yep, defo did started the sweeps at 10hz. I reckon I could almost hit 110db at 10hz which is pretty impressive I think. The qtc off them in sealed is 0.76 which isn't anywhere near as bad as the dual I had which was 0.9. I will let you know what I think off them on saturday when I have a listen with music.
The low tune I modelled in winisd does show a 6db gain over the sealed at 10hz for one sub and that is with not exceeding max excursion so I will run some graphs to compare both. It will be interesting though.
Are you sure. When I started my 100db level sweeps from 1 hz the EP4000 would clip with my DIY sub, but when I changed it to a 10hz start, it didnt clip.The sweeps always start at 0hz regardless of where you set the sweep range. At least this is the case for using a 10hz start setting in REW.
A brilliant idea, I'm surprised more people don't do this. Next step might be linear actuators that you can use to change the vents from the listening positionYep, I have 3 ports which are 7" x 5" by 36" long.
All unblocked is 21.5hz tune
1 blocked 17.5hz tune
2 blocked 12.5hz tune
Port resonance stays the same for all 3 tunes which is about 190hz