I was careful to not claim I noticed that the paper cone 5" "improved" after a break-in.
Reading between the lines of my OP, it could be deduced that I was not completely satisfied with the subjective performance after this period.
Otherwise I would have no motivation (apart from curiosity) for auditioning an aluminium cone version.
How can anyone say the driver "breaks in"? It could as well be the capacitors, coils, resistors or the speaker wire. Maybe the damping material is reoriented by vibrations.
The more (stupid) expensive components get, the more break in is needed to hear any improvement. Maybe...
Just read about speaker wires that need 200 hours to develop their incredible sound.
The more (stupid) expensive components get, the more break in is needed to hear any improvement. Maybe...
Just read about speaker wires that need 200 hours to develop their incredible sound.
In regard to the original post, the paper cone driver was the SB Acoustics SB15NRX2C30-8 and the aluminium cone is the SB15NBAC30-8.
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The drivers are used with an active 3-way 192/24 DSP crossover, so no other passive speaker components apart from 12 gauge copper wire.
The other system components have thousands of hours since new and are transparent to my satisfaction and measurement (typically, Benchmark LA4 standard).
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The drivers are used with an active 3-way 192/24 DSP crossover, so no other passive speaker components apart from 12 gauge copper wire.
The other system components have thousands of hours since new and are transparent to my satisfaction and measurement (typically, Benchmark LA4 standard).
I was just re-reading the original post, and the first dozen or so replies before the thread came apart.
One thing that can make a speaker sound different after a few weeks/months is that the acoustical damping material (i.e stuffing or foam) can settle or fall into the bottom of the cabinet. You say you found the SB15NRX driver to sound different after a few weeks. Did you remove the driver and inspect the stuffing material to see if it shifted?
j.
One thing that can make a speaker sound different after a few weeks/months is that the acoustical damping material (i.e stuffing or foam) can settle or fall into the bottom of the cabinet. You say you found the SB15NRX driver to sound different after a few weeks. Did you remove the driver and inspect the stuffing material to see if it shifted?
j.
@hifijim
I have pulled the drivers multiple times (recently as days ago) and the stuffing does not shift. The box is sealed with extensive bracing and the stuffing is quite secure. I have 5 decades of speaker building experience. Here are some build photos showing the stuffing support.
I have pulled the drivers multiple times (recently as days ago) and the stuffing does not shift. The box is sealed with extensive bracing and the stuffing is quite secure. I have 5 decades of speaker building experience. Here are some build photos showing the stuffing support.
