Majorly Owned!?! :(

[mrfreshnklean 10+ year member]

I hooked my HC18 up in my friends car for testing purposes.

Same amp.

He has two hexagon xplods in a bandpass box with a bazooka 500watt amp.

His system owned my 18.

My main though on this is my box is tooo big.. Its 5.7ft internal before woofer displacement.. (20x20x25 internal) sealed.

What is my air space after the displacement of the HC (couldnt find it)?

Do I need to downsize?

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[InhumanAcura 5,000+ posts]

Put more power on it, and port it.

 

[mrfreshnklean 10+ year member]

That was my other question.. Is this box big enough to port? it would be pretty shabby after port displacement.

But still, the woofer should have out preformed the xplods.

 

[InhumanAcura 5,000+ posts]

Not necessarily, obviously in fact. What kind of car or truck.

Those xplods were at their peak while the HC was sealed and starving for power, i could be wrong but maybe a little to large of an enclosure to be sealed. I dont have time to do the math, but I would assume that box would be ideal for porting.

 

[InhumanAcura 5,000+ posts]

I take that back the box should be a little larger.

 

[Shugarra 10+ year member]

My guess is that amp is not so good for your sub. I don't know the specs but I would assume your woofer is probably 1000+ rms? That bazooka probably only puts out 250. Prefab bandpass generally = crappy sq but loud. With your sealed box you need more power to get as loud as a comparable vented or bandpass. I would guess that between your sealed box and only a tiny amount of power you just weren't able to get the woofer moving at all. Port your box and hook em both up to 1000 watts rms and you will most likely smoke the guy.

 

[EarDrummin. 10+ year member]

Indeed, usually you can't really compare a sealed to a bandpass box in terms of spl. As far as your driver's displacement, I think the HC is .17, which isn't a large chunk of your 5.7 cubes. As far as port displacement, say you wanted 34hz or so, you could use a round port.. Say your port was 4 inches in diameter, for 34 hz it'd be 2.19" deep for your 5.7 cubes. The volume of the port in this case would be .016 cubes, again, not very much. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[BDIDDY 10+ year member]

His subs were peaking while yours was setting there laughing at the 200 watts...

Throw 1500 to it and he'll want a HC..

 

[mrfreshnklean 10+ year member]

Ill port it tomorrow.. go with 4" tubing?

Displacemnt is .25, so how long should it be on a 5.5 box?

Does the port start before or after the MDF?

 

[mrfreshnklean 10+ year member]

Actually, Should I bother porting this small box?

I could just build a new one for $35!

 

[ngsm13 5,000+ posts]

DUDE, that box is not small. If it has a 5.7 cube internal volume...then after the measily sub displacement (.17 cubes) and port displacement (
NG

 

[mrfreshnklean 10+ year member]

RE suggests 6.5

 

[EarDrummin. 10+ year member]

RE suggests 6.5

You're right, that's insane, lol. From a 15 to an 18 it jumps up 3 feet.. recommended? Anyway, IMO you'd be perfectly fine with a near -6ft^3 enclosure. If you have the space, money and patience to build another colossal box, go for it, but what are you going to do with the other one?

 

[k-mart 10+ year member]

That bazooka probably only puts out 250.

Actually, that bazooka amp, if its the 1500, puts out at least rated power.

 

[Randy Savage 5,000+ posts]

DUDE, that box is not small. If it has a 5.7 cube internal volume...then after the measily sub displacement (.17 cubes) and port displacement (
NG

.1 displacement for a port is nothing...it'll be more than that...

I was doing high 140's with a 15HC and 800 watts...it doesn't need 1200...