Ron and Prof, Ron's 3.7s are new old stock as I interpret the particulars. Rob has various cabinets and parts and I believe he assembled that pair from such service parts. So, all the parts would be unused.
Break-in is something that many engineering-oriented observers dismiss as voodoo or make-believe or user acclimation. From the very beginning, we perceived its reality beyond question, but have never developed any definitive causal narrative. Jim's official answer was "I have no idea why." Of course he had ideas, but didn't want to enter the controversy. Among the causes are physical elastomeric settling of driver suspensions: surrounds and spiders. The cabinet itself settles in via the extended vibrational patterns. All the passive parts have their micro-structures altered by electricity, magnetism and vibration. A huge deal is solder joints . . . heat distresses the molecular structure of the long-crystal copper, which the "heals" with use. I experimented with crimped (cold-welded) joints, to audible improvement, which isn't practical in crossovers.
Although subject to derision in some circles, I will be comparing cryogenically treatment to non. Prior experience with guitar strings and knowledge of what is happening biases me toward expecting improvement there. The ear-brain is capable of immense discernment. Our job is to find synergy among the myriad variables to produce cost-effective outcomes.
Break-in is something that many engineering-oriented observers dismiss as voodoo or make-believe or user acclimation. From the very beginning, we perceived its reality beyond question, but have never developed any definitive causal narrative. Jim's official answer was "I have no idea why." Of course he had ideas, but didn't want to enter the controversy. Among the causes are physical elastomeric settling of driver suspensions: surrounds and spiders. The cabinet itself settles in via the extended vibrational patterns. All the passive parts have their micro-structures altered by electricity, magnetism and vibration. A huge deal is solder joints . . . heat distresses the molecular structure of the long-crystal copper, which the "heals" with use. I experimented with crimped (cold-welded) joints, to audible improvement, which isn't practical in crossovers.
Although subject to derision in some circles, I will be comparing cryogenically treatment to non. Prior experience with guitar strings and knowledge of what is happening biases me toward expecting improvement there. The ear-brain is capable of immense discernment. Our job is to find synergy among the myriad variables to produce cost-effective outcomes.