tri 15 sub wiring

hey everyone, i am new here- my first post. ive had a look around, trying to find how to best wire my 3 txxap15 audiopipes off my earthquake ph5000d amp, i was trying to best match rms wattage for subs and amp.
i purchased 2 subs first, which are both 2x2 ohm coils- i purchased the third about 8 months later, which is labelled 2x4 ohm coils, so- i had originally thought - 3 1000 watt rms@ 2 ohm subs running on 1x3000 watt rms@ 2ohms amp would work perfectly, and without REALLY knowing much about how subs ohm would relate to my amps output ohm. So now i am running 2x 2x2ohm subs, and 1 4x4 ohm sub- in parallel, it runs fine, no issues whatsoever except i would like to know what ohms i am running my amp at? ive tried working it out on the 12volt parallel calculator but it just confuses me, can anyone help me out a little bit? i know my stupidity might frustrate some, but any help will be appreciated :) any suggestions?

four 2 ohm coils and two 4 ohm coils all wired in parallel is .4 ohms as done with the parallel wiring calculator to the left.

I would highly not recommend using two dual 2 ohm subs and one dual 4 ohm sub. The dual 2 ohm subs are receiving TWICE the power than the 4 ohm sub.

thanks for the reply aznboi, yeah i ideally wouldnt like to either but seems i have to! .4 ohm hey, kind of hard to believe the amp is running that stable, i was thinking about that 'twice the power' thing as i was installing it, im guessing the rms wattage of each sub is ...well relative to the ohm load it is given- like...2x 2ohm coils-500 wrms each, and 2x4 ohm coils-250wrms each, if the ohm load has a direct relationship with wattage , because i was checking the movement of each woofer (not very accurate i know) by hand after i installed it, at low volume, and they are all identical, and at high volume there is no difference with movement either, all in perfect harmony-
now, if i am to believe that the 2 ohm subs are receiving TWICE the power as the 4 ohm sub, would they not have some descrepency as opposed to the movement of the 4 ohm sub?
if there SHOULD be a difference then "2x 2ohm coils-500 wrms each, and 2x4 ohm coils-250wrms each" seems feasable.. anyone with any experience know anything about this? sorry, i know its a little confusing!

sorry, and i think it is parallel!
pos from amp to 1 positive coil on first sub- from there to 2nd sub- from there to third sub
negative on amp to negative on opposite coil 1st sub-to 2nd, to 3rd
bridge pos and neg on each sub individually :P sorry!

Disconnect  your wiring from the amplifier.  Now, connect meter to the wires for a reading of DCR.  However you have your subs wired together, there will be a certain resistance that can be read.  Multiply that DCR reading X 1.3 for approximate impedance.

If you use a digital multimeter, zero adjust is done by first touching probes together and noting the resistance reading.  Subtract that internal resistance from what you actually measure.  Then multiply X 1.3 for a good approximation of impedance.

example:  my Craftsman meter shows .8 ohms internal resistance.  Doing a test, I read a speaker at 4.9 ohms.  Subtract the .8 internal meter resistance to get 4.1 ohms DCR.  Multiply X 1.3 to get 5.3 ohms approximate impedance for this speaker.

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bury]s wrote:

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rry, and i think it is parallel!
pos from amp to 1 positive coil on first sub- from there to 2nd sub- from there to third sub
negative on amp to negative on opposite coil 1st sub-to 2nd, to 3rd
bridge pos and neg on each sub individually :P sorry!

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Sounds to me like you may have each sub's set of VCs paralleled then all three subs in series.  This will net a 4-ohm load on your amplifier.  If all six VCs are in parallel, your amp should shut down in protection mode.

But yes, I agree with the above statements that your DVC 2-ohm speakers are using about twice the power as is your DVC 4-ohm speaker.  Not a good setup.  All speakers in a system should match.

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ok...ill see if i can get this third sub exchanged, seems the only way ill be able to run it safely will be if i get another 2 ohm sub.i dont really wana harm any of my equiptment,  thank you for the input guys