I have a Pioneer 10 under the rear of my Screw and I am getting 3 solo square kicker 8s for the behind seat ... Id like one amp to run it all .... 8's are in parallel ... Any suggestions? Under 250$ if possible. Clean sounding no frills amp. I have a Alpine XM deck with iPod hooked in... A seperate amp already running the doors.

Thanks in advance..

 

Ummm.... You want an amp to run all 4 subs? three 8s and one 10. That is ridiculous. First off lets talk about the total ohm load of those 8s, what is it? Then lets look at wattage required to power those 8s. Kicker says 450W RMS each. Now lets talk about that 10. Will your 10 handle the power it will take to drive those solos? Here is my suggestion......PICK ONE. Either use the 8s or use the 10.

 

Now Now, thats no fun... I want it all! I want subs coming out of my butt! Let me do some digging on the ohms and watts. get back to ya

 

Mixing sub sizes, brands, models, or anything like that is pretty much a no-no.
You want to have the exact same subs. Even the same subs, but different ohm's (say one is a SVC 4 ohm, and the other is a DVC 4 ohm) is not the best think to do. Specs can very enough between that even to cause some damage.

Mixing sizes will more than likely cause cancellation too. You wont get them to blend together, muddy sounding etc, it just doesnt work.

In a nutshell, just dont do it.

Either use the 8's, or use the 10. If its not enough, get more OF THE SAME EXACT THING and go from there.

Good luck

 

Ok - here is what I have

Three Solo Baric Kicker 8" S8L7 subs dual voice coil (2ohm each)

they are in a .9 sq ft sealed box.

they are rated at 450w rms / 900 peak for both coils

They are wired in parallel on one side and the other side is wired in parallel.

If I figure correctly.. they are running at 1.3 or 1.4 ohms

So I think I need a 1 ohm stable mono amp

I figured that they would handle about 225 rms each coil so about 675 total rms is needed for the amp.

I am looking into the BP1200.1 JBL mono block amp - might be a little over kill.

What are your suggestions??

 

I think they can be wired in parallel for a 3 ohm load in or in series for a 1.3 load. So look for like a 1500 watt amp at 1 ohm, to get the most wattage for your money. How much are you wanting to spend on your amp?

 

I'd like to stay under 250$ for a used amp. Is that too low? From what I am seeing on eBay, that seems in line... Do you think the JBL BP1200.1 is too under powered? Keep in mind. I dont want to blow my head off, just have some nice tight bass for the Deftones in my head!

 

I would want to match the subs rms, but thats just me. Most subs will reach full xmax at a little less than the rated power. Since with trucks you have to sacrifice box space, you basically want as much power as you can get your hands on, to get the most out of your subs. Unless your have them in a larger ported box, go wtih more power basically...even if you dont need it, its fun to have.

cadence z7000 would do nicely
ed nine.1 (go ahead and hate me)
hifonics 2005 line is decent

 

Yeah, I would series wire each sub (so you have 4 ohm/sub) then parallel wire all the sus together, for a final load of 1.33 ohm.

JBL BP1200.1 would work great for that. They are under rated, expect in the 1400 watt range from one of those (466ish watts/sub). Plus it gives you that power at 1 or 2 ohm, so thats what your going to get at 1.33 ohm. They are nice cheap power. And you can easily get them for under 250 used.

They can be wired for 3 ohm too, but its gonna cost more than 250 bucks for a nice amp that does the power you want at 3 ohm.

 

Thats good news ! I ended up purchasing a BP1200 tonight for under 200$ to the door.

So here is the wiring.. is this correct?

Positive from amp goes to speaker 1 positive, then from speaker 1 to speaker 2 positive... then from spk 2 pos to speaker 3 positive.

Same for negative - all three subs neg wired together.

Now for the other voice coil, each speaker has a small jump wire that only connects from the pos to the neg on that speaker. there is no wire that goes from speaker to speaker.. I assume this is correct and my ohm meter shows 1.3 ohm on the terminal coming out of the box.

 

I assume Im reading that wrong, and since you are getting 1.3 ohm and the terminal cup they are wired correctly.

The way Im reading though, is you have one VC from each sub hooked together, and the other VC's hooked up normal (pos to pos and neg to neg). If so, you have a problem.

But Id say Im all confused and they are wired right

 

I found this for you: http://mobile.jlaudio.com/support_pages.php?page_id=161

This is how it should be hooked up to achieve the 1.3 ohms total.

 

Great link/diagram - I think I didn't express what I was seeing very well. According to that link and my sub wiring - I am correctly wired at 1.3 ohm.

Now - a new question -

I am having to redo the front of this box because some idiot that made it did a bad job - I am wondering if 3 of these subs is going to hurt performance because the box space might be a little shy.

I calculated the internal air chamber at .9 cubic feet

The subs call for .33 - .75 cubic feet

So I have three - I think the minimum space would be 1 cubic feet and I am shy of that. Should I just put two subs back in the box or do you think they will still sounds good with some polyfill and a good seal on the box?

 

Another great link I found

http://www.cardomain.com/shop/woofer..._dvc&x=117&y=6

 

You have to remember too that usually airspace does not account for the amount of displacement for the subs themselves. My guess is it'll sound ok, but it will be a bit small. You'd probably get more out of those subs with a 1.5 Cu.Ft. box.