Hopefully this is the right place to post this. I'm trying to build a rudimentary speaker using a 32 awg wire coil and four small magnets stacked on top of each other, with a paper cone attached to the coil. I built a prototype using a 44 awg wire coil on the same magnets with the same cone and it worked, however it was very quiet. The 44 awg coil had fairly high pure resistance (about 60 ohms) so I figured using a larger gauge wire would result in louder sound due to higher current. However, the new coil produces hardly any noise at all, despite having a pure resistance of 7 ohms. I'm not an audio engineer, I'm a student, so I'm really in the dark as to what the correct construction would be that would result in a decent level of sound. My main questions are as follows:
1) How much current do you need to produce a decent level of sound? Would this relate to how heavy the coil was, e.g., would you need higher current to move a bigger coil? Would making a voice coil with less turns be valuable at a certain point due to having lower inductive reactance, and thus higher current?
2) I'd assume that a coil could become too heavy to work properly, but how heavy is too heavy? Is there a function or ratio that I could use to determine this? Mine is probably only a few grams.
3) In general, what is the optimum number of turns in a voice coil?
Mainly I'm just wondering if there are formulas/ratios or just common knowledge on speaker construction that I'm unaware of.
1) How much current do you need to produce a decent level of sound? Would this relate to how heavy the coil was, e.g., would you need higher current to move a bigger coil? Would making a voice coil with less turns be valuable at a certain point due to having lower inductive reactance, and thus higher current?
2) I'd assume that a coil could become too heavy to work properly, but how heavy is too heavy? Is there a function or ratio that I could use to determine this? Mine is probably only a few grams.
3) In general, what is the optimum number of turns in a voice coil?
Mainly I'm just wondering if there are formulas/ratios or just common knowledge on speaker construction that I'm unaware of.