Before I did it I ran my first ever rew sweep with the mic I had for Christmas. I was in my sitting position approx 2 metres away. Can the double bass reflex be seen in the measurements?
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In the meantime, the driver will still be working. I'm sure you can make a running repair.
I find this flexible black sealant, available at Halfords, useful for repairing small holes in speaker surrounds or cones:
https://www.halfords.com/motoring/p...nville-black-silicone-sealant-40g-173867.html
I find this flexible black sealant, available at Halfords, useful for repairing small holes in speaker surrounds or cones:
https://www.halfords.com/motoring/p...nville-black-silicone-sealant-40g-173867.html
Assuming it is a double bass reflex!
I would think an impedance versus frequency curve would be more helpful, let's see the others' opinions.
I have saved the file can I adjust this with the save file or do I need to run another sweep?
Well, i've done a repair job and i'll keep an eye on it to make sure it doesn't get worse. I didn't want to put too thick a layer over it so i'm not sure whether it will hold. While i had the driver out i had a look at the design. rather than i port it was multiple 1-2mm slits spaced apart about 20mm. They seem well made with sheep's wool stuffing, a decent gauge wire and plywood sides then mdf front and back. The port in the bottom chamber is both wider and longer than i've seen before.
So, it is an "acoustic filter/bass reflex" design as I described.
Jings, crivvens and help ma boab, I got something right for a change! 😎
I believe this design can be classified as a variant of DCR, but there is a difference in that the partition acts as a mechanical broad banded (non resonant) LPF and coupled with the vented cavity forms a bandpass filter function without the gain of a traditional bandpass design.
DCRs have three peaks in their impedance curve. The partition may be suppressing the third resonance but still allowing the vent to have a wider output FR with more dampened upper bass. Thats at least my theory but without measurments still a speculation.
Very sorry to hear the OP damaging his driver in the attempt to provide info for others on here. Makes me want to buy him a drink for his sacrifice to science.
DCRs have three peaks in their impedance curve. The partition may be suppressing the third resonance but still allowing the vent to have a wider output FR with more dampened upper bass. Thats at least my theory but without measurments still a speculation.
Very sorry to hear the OP damaging his driver in the attempt to provide info for others on here. Makes me want to buy him a drink for his sacrifice to science.