David, I have 2 of these. They work fine but i want to change the impedance and let you work your magic.
so i need 2 recones
Woofer Brand: FI audio
Model: BTL UFO sytle
Do you have more than one of these subwoofers used in the same installation? If so, how many? 2
How much power does the/each subwoofer need to handle? (RMS power) 2500 each if we can. I think that was factory rating.
What impedance will you need (Per voice coil)? 4 ohm per coil
The brand, model, and quantity of amplifiers that you'll use? 2 Crescendo BC3500s
The impedance at which you plan to run each amplifier? .5 ohm
The type of enclosure that it needs to work in? (Sealed, ported, bandpass?) Ported
The size and tuning of the enclosure that it needs to work in? 3.5 cubes each tuned to 30hz
The type of music that you'll listen to with it? Rap, DubStep
Will you be competing with it, or is it a daily usage subwoofer? daily
Is it for competitions only? NO
Would you like any special colors? If so, where?Green PSI logo
Upgrades of any sort? Direct leads, carbon fiber dustcap, etc? Carbon fiber dust cap
If you have a budget to keep, what is it? no budget
Any other special instructions or requests? NO
Where are you located? Springfield, IL
Would you like to send your subwoofer to us, or if possible, to have a rebuild kit sent to you? Kit sent to me please
If you are requesting parts, would you like to purchase glue, shims, or solder to assemble them with? Glue and shims please.
Factory coil seems to be 68mm long and 4mm thick including the former. I do have the factory basket/motor spacers. I can use these or the ones you have.