Copper lowers the sensitivity, but increases the BL^2/Re thus allowing the driver to work in smaller boxes because the Qts lowers. Generally (not always) the Qts lowers with copper even though the mms raises and SPL lowers. The effects of "smoother transit response" or any claimed “SQ” improvement is purely a function of the difference in Q and/or Fs relative to the system alignment (box size, type and frequency response). Copper does NOT improve “SQ” in the technical aspect of the term. “SQ” is exclusively improved with lower distortion, i.e. linearity via inductance, BL, and/or compliance variation over displacement -those are the three major factors along with linear frequency response which is a function of the driver’s TSP’s and system design. Copper and aluminum are identical in “SQ” respect. Copper also increases thermal handling because it is a slightly better thermal conductor than aluminum. Therefore…If you want to use the driver in a smaller box with more power, choose copper, otherwise choose aluminum. Many home theater subwoofers use copper coils because they have limited box sizes and they indend to maximize the BL product. Copper vc and Aluminum VC drivers carry very different TPS’s therefore it is important to look at both carefully when choosing a driver for a system. Swapping the coil makes enough of a difference to vary your system design substantially.
Let me ask you this Kyle.
Do you:
A) Explain something in terms that somebody will never understand, cant relate anything to, and they really don't care about the technical aspect.
or
B) Explain something in terms that actually relate to the question at hand in a real world scenario, with the given sub that the person is actually going to use.
We rate the coils for the same RMS, that is not saying that one coil will not handle more power then another, but it is rated that way for a reason.
I chose B) Because, i have the sub, and i know how it reacts to the copper coil, and i can relate it to a real world scenario and explain it in terms that he can relate to and understand. (IE, it will and does sound better, vs. the standard coil)
Sure i could get into a nitty gritty technical battle, but...at the end of the day, the OP would learn nothing, would still ask the same question and everything that you just spent 15 minutes typing out in his eyes doesn't matter. He just wants to know how the sub is going to sound per given option A,B,or C. So, i gave him just that...exactly what he wanted, nothing more, nothing less. In terms that he can relate to.
While in Rome, Do as the Romans do.