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2018 Honda Accord EXL 2.0 GB 3way doors GB40/10 centre Helix M4dsp/M6 Sundown salt MMats + more
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Run both in a sealed box. I too was inhappy with 1 in a 1 cubic foot box on 1500-2000 watts then I double power and added a second one still sealed. Them things are all you need unless your trying to crack your body panels. What type of car.
 

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If your going to build a box like that for those subs might as well buy a pre fab like this ⬇.

 

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2018 Honda Accord EXL 2.0 GB 3way doors GB40/10 centre Helix M4dsp/M6 Sundown salt MMats + more
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Do you mean you added a second 1cf box for the additional driver or add the second driver to the same 1cf box?
I added a second SQL in a pre-fab dual sealed box 1.1 each. And ran my amp at 1ohm instead of 2ohm . That's where I'm settling and having a box built for those 2 soon.
 

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Truth be told I'm running 400 watts probably after box rise because I'm using a Phoenix gold xenon 400.1 which makes the same power between 1-4 ohms. Based on a previous setup I had in the car I'm probably hitting 128 dB right now. The car is a 2019 Nissan versa so horrible for spl from what I can tell.
Yea sedans suck when it comes to bass. Especially higher bass frequencies.unless u go IB or seal off your trunk and fire forward.
 

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Yes it will handle 3k and sound amazing doing it. But like stated above not for very long before you can star smelling it. I did once on a day trip and after around 45 min with volume around 3/4 it started to smell so I turn it down and let it rest. Kinda scared me at first cuz the last time I smelled voice coil that sub didn't survive (kicker). So I pulled it out when I got home. It looked good still but waited to get the second SQL to run it again. I've been running 3k to them daily and theyll handle it all day long and damn they hit hard and sound fantastic. I've ran the 2 for hours on 3k and have not smelled them get hot.
 

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Thanks! I have an SQL-12 in 1cf sealed. Cheap prefab box for now. Overall pretty happy with it, but considering a better sealed box or maybe ported. Even considering a trunk baffle IB, but lot easier to try some boxes first.
That's what I did, my SQL has had 3 different sized pre fab sealed boxes before settling with the size that fits my need. 1.1 after displacement. Eventually I'll have a dual 12" built out of birch.
 

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Good read and tests. Love to see experiments like this.
 

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I've been running ported boxes forever and considering building a box for a couple of these sql-12's... I've had the same dual 12" kicker comp ported prefab for like 14 years and at this point it is the 'lowest' part of my system. It has been taking 900rms for a while and really pounds (and gets low with some eq), but it struggles with really fast passages. It sounds great for rap, of course, I listen to all types of music. Do you think 2 of these 12's in a sealed box would really do the trick?
Yes, after hearing/feeling these 2 SQLs, I probly won't run anything else... for now.. I was thinking 1 15" Adire kali sealed before the SQLs but I don't think it will hit harder than the 2 SQLs. They were on sale when I bought them so I could pass up the deal. Matter of fact even when not on sale it's a steal. I think one day I'll still snatch up a kali but for now I'm satisfied. Just an FYI I mainly listen to rap and they hit hard, they'll handle any music you throw at it.
 

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Why would you need 2 lithium batteries and a cap bank on 2kRMS (I think that's what you said your runing) I'm running 2 lithiums in the back and a AMG up front on a stock alternator (130A) and when I run my amp at 2ohms (2k) my voltage dosnt even flinch at a stop. Mind you I have 3 other amps running a total of 2k also. The only reason I got a 2nd lithium was because when when I ran my amp at 1ohm my voltage would drop to mid 12s at idle. What lithiums are you running?
 

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Cap banks and lithiums aren't meant to hold alot of reserve power (I think).so for quick burps I guess it's OK. But I'd consider a good AGM up front and the cap bank for your bass amp in the back like some one else stated. I don't do burps, (unless I drink soda too fast) and my main priority was to be able to listen to music (loud AF if I please) for a long period of time while I drive and not deplete my batteries and not upgrade my alternator until my warranty runs out on my car. My goal was accomplished with a AGM in the front and 2 lithums in the back (xs power titan8 RSV-5 AND PWR-5).
 

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For your case you may need an isolator I haven't looked up your battery yet. But with my lithums it's not nesseray. My lithiums and AGMs rest at high 12s. My resting voltage is 12.8. The reason your not suppose to mix them is because most lithiums rest much higher than AMG and lead acid batteries will leach off each other while resting. Possibly damaging your batteries.
 

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No, if it rests at 14.8 that's way too high. AGMs rest at hight 12s. Are your lithums already hooked up to your system?
 

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I still suggest a sealed box for them SQLs. Tuned to 33 is a waste of subsonic frequencies from that sub. Use your ported box for your SPL shows and the sealed box for every day listening. I have different boxes with different subs for different moods.
 
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