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<blockquote data-quote="Deiimos" data-source="post: 8893423" data-attributes="member: 682903">I would definitely do separate boxes or separate chambered box for mix match like this (the wiring gets weird, and sharing airspace gets weird). I would ponder a multi channel amp as mentioned, that&#039;s probably the best bet, or maybe a high current 1-ohm amp to just wire everything in parallel at 1-ohm and not even worry about it since it is a fairly basic setup. I use to do this as a teen with my home receivers. I had Crunch 4-ohm 15’s is separate sealed boxes on the floor, and 8-ohm Technics home tower 12” 3 way speakers on top of those. The 15’s added a lot more bass than just the Technics could do by themselves on the same receiver and the Technics still sounded fine.If you have to have a 2 ohm load:The pair of 12&quot; subs is 2-ohm with the single 4 ohm coils in parallel.Or, only use the 15 since it is 2 ohm single coil.Adding the 15 with the 12&#039;s makes it 1-ohm if all parallel.Only thing &quot;close&quot; to 2 ohm, you would have to wire the 12&#039;s in series to 8-ohm, and then parallel with the 15 for 1.6 ohm (which could blow your amp), and not sure how that will perform. The 15 and 12&#039;s will never share the power together well, the 15 will hog the power in this last scenario. I personally wouldn&#039;t bother with it, but if you can make it work, I guess have fun with it experimenting, I did a lot of this with subs / amps.By the time I had a car I didn’t care enough to try to cram mix matched subs in and would only run matching subs or just one or the other. Well, actually me and my cousin built some crappy bandpass boxes for our 10&#039;s, I had two&nbsp; Jensen XS 10&#039;s, he had two MTX 3000 10&#039;s. We put those two boxes in a trunk of an 83 or 84 Mazda 626 that didn&#039;t run (well it ran but had other problems) my parents had sitting in the driveway and it hit much harder with both boxes than just one, but they were all low power 10&#039;s and single 4 coils, so was easy to get 4 ohm load, bumped the hell out of 69 Boyz 199Quad album. <img class="smilie smilie--emoji" loading="lazy" alt="🥳" title="🥳" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f973.png" /></blockquote>

[QUOTE="Deiimos, post: 8893423, member: 682903"] I would definitely do separate boxes or separate chambered box for mix match like this (the wiring gets weird, and sharing airspace gets weird). I would ponder a multi channel amp as mentioned, that's probably the best bet, or maybe a high current 1-ohm amp to just wire everything in parallel at 1-ohm and not even worry about it since it is a fairly basic setup. I use to do this as a teen with my home receivers. I had Crunch 4-ohm 15’s is separate sealed boxes on the floor, and 8-ohm Technics home tower 12” 3 way speakers on top of those. The 15’s added a lot more bass than just the Technics could do by themselves on the same receiver and the Technics still sounded fine. If you have to have a 2 ohm load: The pair of 12" subs is 2-ohm with the single 4 ohm coils in parallel. Or, only use the 15 since it is 2 ohm single coil. Adding the 15 with the 12's makes it 1-ohm if all parallel. Only thing "close" to 2 ohm, you would have to wire the 12's in series to 8-ohm, and then parallel with the 15 for 1.6 ohm (which could blow your amp), and not sure how that will perform. [B][U]The 15 and 12's will never share the power together well, the 15 will hog the power in this last scenario.[/U][/B] I personally wouldn't bother with it, but if you can make it work, I guess have fun with it experimenting, I did a lot of this with subs / amps. By the time I had a car I didn’t care enough to try to cram mix matched subs in and would only run matching subs or just one or the other. Well, actually me and my cousin built some crappy bandpass boxes for our 10's, I had two Jensen XS 10's, he had two MTX 3000 10's. We put those two boxes in a trunk of an 83 or 84 Mazda 626 that didn't run (well it ran but had other problems) my parents had sitting in the driveway and it hit much harder with both boxes than just one, but they were all low power 10's and single 4 coils, so was easy to get 4 ohm load, bumped the hell out of 69 Boyz 199Quad album. 🥳 [/QUOTE]

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