My sonace 12 sub is blown, should i replace it with a 4 ohms are 8 ohms sub ?

mr david,i recommend inspecting the subwoofer's voice coils visually for any signs of damage, such as tears or burns, and r double-checking your wiring connections

Probably. Most Car Subs Are 4 ohms. Most home subs are 8 ohms. If your amplifier is 4 ohm stable then yes. There will be no problem. Your kicker could have a model number something like c104. The last digit should be the ohms.

amp is in protect mode. check your wiring and make sure your sub is wired properly for ohms. dual 4 ohm in parallel = 2ohm. dual 4 in series is 8 ohms. dual 2 ohm parallel= 0.5 ohms and in series 4 ohms. check ground and power wires. make sure sub isnt blown. a blown sub WILL cause this on any amp.

It measures in at just under 4 ohms, so assume a 4 ohm speaker. You can replace this with any number of similar subs, using perennial DIY favorite PartsExpress, there are two under $30 that would meet your needs (Dayton SD215-88 and Goldwood GW408). Looks like they both have dual 8 ohm coils, so you would simply wire them in parallel for your application.

+ on amp output to + on speaker #1 to + on speaker #2. - on amp output to - on speaker #1 to - on speaker #2. This is a parallel circuit....4 ohms in parallel with 4 ohms = 2 ohms. IF it were wired in series....would represent 8 ohm load.

Is the speaker a dual voice coil speaker? If so you can wire it up a couple of diferent ways, go to rockfordfosgate.com they have a woolfer wiring wizard that can show you the different ways to wire for 8 ohm.....4 ohm.....2 ohm....and 1 ohm...I would figure out how to get the most power out of the amp in mono mode, take that ohm load from there and see if you can wire your speaker to match it.

+ output from amp to + input of 4 ohm to + input of 8 ohm AND - output from amp to - input of 4 ohm to - input of 8 ohm is a parallel circuit = 2.66 ohm impedance load for amp
+ output from amp to + on 4 ohm - on 4 ohm to + on 8 ohm - on 8 ohm to - of power amp is a series circuit = 12 ohm impedance load for amp. Clear as mud??
Clear as mud?

If you had 4 single voice coil speakers you can create either of those 2 ohm or 4 ohm setups. If you run 2 of them in parallel you will get the 4 ohms. If you run 4 of them in parallel you will get the 2 ohms. In parallel I mean that you connect the positives together and run them to the positive on the amp and the connect the negatives together and run them to the negative on the amp. Let me know if you need more help. Good Luck.
-Andrew Hawkins

You can connect them in a series/parallel configuration. Put two of them in series and then connect the last one in parallel across the two in series. This would give you an impeadance of around 2.7 ohms. Only do this if your amp is stable at 3 ohms or less. I am not familiar with the specs of your amp. If your amp is only 4 ohm stable you can not do this.
This would also give you half the power on the two subs in series as the power for the one that is parallel. The two in series would be sharing the total output signal, where-as the one in parallel would get the entire output signal from the amp.
if you were to connect a fourth sub woofer in this configuration it could give you a 4 ohm load, by adding the fourth sub in series with the single sub that is in parallel. or in other words, yu have two sets of 2 sub woofers each in series. That gives you two 8 ohm loads (two 4 ohm subs in series is 8 ohms). Then you take the two sets of subs and parallel them (two 8 ohm loads in parallel equals 4 ohms).

If i had a picture to show you it would make sense, two subs in series that are in parallel with two subs in series.

The easiest way to think of wiring voice coils and subs is this:

• Two items of the same impedance in parallel = Half of the impedance
• 4 ohms in parallel with 4 ohms = 2 ohms
• 8 ohms in parallel with 8 ohms = 4 ohms
• Two items of the same impedance in series = Double the impedance
• 4 ohms in series with 4 ohms = 8 ohms
• 8 ohms in series with 8 ohms = 16 ohms

In this case, you want to wire two subs, each with dual 4 ohms voice coils, so that the total equals 2 ohms. Your options are:

• DVCs in parallel, 2 subs in series = 4 ohms
• DVCs in series, 2 subs in parallel = 4 ohms
• DVCs in parallel, 1 sub = 2 ohms

With two, dual 4 ohm subs, you can only have 1 ohm or 4 ohm total impedance.