SSA Demon 12 new ported box questions

[Jeffdachef 5,000+ posts]

Got ya. I would assume that was the case. You all have mentioned a larger box being more peaky but I thought I had read that a flatter response was a benefit of going big.

really depends on your cabin gain, lets say your vehicle peaks at 48hz and with a typical sealed box, your output falls off a cliff at 35hz(it still plays it but weak as fk vs the other frequencies) Now you do a ported box at 30hz relatively normal to small size, you'll still have an output difference at 48hz and the frequencies under, So if you increased the box size to increase peakiness at port tuning frequency, your overall in car response would start to flatten out more.

However if your car has relatively decent accoustics with not much peaks or multiple peaks(high and low) then you'd actually want the moderate sized for flatter response.

Also the sub you have matters too, this is where winisd comes along and you can see how the sub behaves and reacts without cabin gain included. Some subs will play flatter with a big box, some will play flatter with a small box. But in general you'll see the peak in the response get bigger and bigger the more airspace you add along with the group delay getting sloppier and sloppier but SPL increases quite a bit too though, so there's trade offs.

 

[Greg B]

I originally modeled the box I have at the sealed volume for the sub I had then. It was very flat and I liked the overall response. I wanted more boomy lows and to face it up because of having to actually keep stuff in my hatch so I added the port, which put it towards the high end of the manufacturer’s ported volume spec. I was reading something that led me to port it at 30 so peak would be below the frequencies I would be listening to and it would supposedly be flat through my listening range. That cheap sub pounded low but fell on it’s face pretty quickly. The demon has a whole lot better sq and didn’t fall off as quick. (I incorrectly set the lpf when I switched subs) I’ve only driven about 10 miles since I caught the problem it’s really night and day but I still feel like raising the tuning will make it even better. I’m sure the right box would improve even more. I’m not in any rush though I like trying new things and learning. Plus once I get it “right” I’ll get bored and have to upgrade something else

 

[THATpurpleKUSH 5,000+ posts]

WINISD's lack of ability to figure cabin gain always causes people to tune lower than necessary.

That's one of the main reasons I switched to Bass Box Pro

 

[2RZ-FE 10+ year member]

I was the one that built all those boxes. A 2.10 @ 33hz box which was the first one and is at the recommended higher end of the volume and tuning. That box was made to play metal and rap with a flat response. It wasnt good at first but later found out I needed a new deck and after I got a new one that box sounded good. The larger boxes were near 3cf at 39-41hz. They all sound good too. I also have a P3 10 in my other ride in a 1.4cf @ 32hz and it can play metal with authority as well as rap.

 

[Greg B]

I really liked my p2 in a 1.4 at 35. Didn’t need much power and played everything good in a little car. I had a cvr in the same box and it was much better in a bigger car. I just wanted a little more of everything. I think I’m going to cut the port down a little and rock this box for a while. GnR and Metallica are sounding really good and I still have great lows

 

[Greg B]

I was the one that built all those boxes. A 2.10 @ 33hz box which was the first one and is at the recommended higher end of the volume and tuning. That box was made to play metal and rap with a flat response. It wasnt good at first but later found out I needed a new deck and after I got a new one that box sounded good. The larger boxes were near 3cf at 39-41hz. They all sound good too. I also have a P3 10 in my other ride in a 1.4cf @ 32hz and it can play metal with authority as well as rap.

Do you remember what hit the hardest? I had something fall on the sub and started getting a rattle inside. I swapped out my old sub and it’s still rattling so I’m going to try a new box before I recone it

 

[shredder2]

I’m currently running a 2.13 cube box tuned to 30.
This will be in a santa fe.
I listen to probably 60% late 90’s to mid 2000’s rap, 30% 80’s and 90’s hard rock and some miscellaneous
It’s got a nice sound but I’m not getting much kick drum punch.

Either tune higher or strengthen your fronstage (midbass)... Its easier to tune for beats vs a Sq rabbit hole IME

 

[Greg B]

I’m planning to tune at 38. Since I temporarily put my old $20 power acoustik in I’m reminded how hard it hits and kinda miss it. It sounds like crap but hits really hard. I’d assume the ssa should hit at least as hard if tuned right.

 

[shredder2]

I’m reminded how hard it hits and kinda miss it. It sounds like crap but hits really hard. I’d assume the ssa should hit at least as hard if tuned right.

what do you mean by stating "hard?"
Punchiness?

 

[Greg B]

Pa is not as loud as ssa but you can feel the air when it hits more. Shakes things and I can feel my hair moving around. The funny thing is the ssa either flexes the door glass or shakes the side mirrors but inside the car the pa feels like it’s hitting a lot harder

 

[shredder2]

Pa is not as loud as ssa but you can feel the air when it hits more. Shakes things and I can feel my hair moving around. The funny thing is the ssa either flexes the door glass or shakes the side mirrors but inside the car the pa feels like it’s hitting a lot harder

Thats a 40hz tuning usually (or close),,, impact from the subs make up for frontstage. Raising the LP on a low tuned box usually helps a little too (with localization issues).... proper tuning is best at that point as a prefab tune can be made to sound good... just not esoteric good.

 

[Greg B]

Thats a 40hz tuning usually (or close),,, impact from the subs make up for frontstage. Raising the LP on a low tuned box usually helps a little too (with localization issues).... proper tuning is best at that point as a prefab tune can be made to sound good... just not esoteric good.

You advised me to raise the lpf before and it made a huge difference. Before the box (hopefully) or sub got damaged I was where I wanted it musically just lacking some impact. I’d like to stay with an aero port unless it would make a big difference.

 

[2RZ-FE 10+ year member]

I fixed my issue last week it wasn't the deck it was the amp grounds. All my Demon boxes were either given away or tossed. Its safe to say I never heard the Demon properly since I had this ground issue the whole time. I can't test it I tossed the last box before I fixed my issue. Tested it with my P310. My Demon is ok I tested it free air, with a multimeter, etc. I'm making a new box less wide and more deep so I can have side storage for my jack, jackstand, jumper cables, etc. Can't wait to hear it properly.

 

[Greg B]

Yeah with kids it’s hard to avoid having a bunch of stuff in the car. I’m probably sticking with 24” front to back and going taller maybe narrower side to side to not lose any room. Plus it puts the port about 6” from the rear hatch.

 

[Greg B]

I finally had a chance to get the new box built. After some more research I read that a smaller enclosure would give it some more punch. I ended up at 1.8 cf tuned to 38. I played a couple rap songs with lower notes and a couple metal songs. What a difference. I’m feeling the bass hit a lot more compared to the same volume before and it’s more like individual notes than a long boom that changes frequencies. Thanks everyone for the help