Is it just a spl sub or will it make a good daily.

Excellent sub for daily

Will they dig low like if you tuned to 30 or 32. An 18 inch

Depends on what low means to you. 20hz? 28hz? The sub will get low no problem in the right box. Give it the necessary air space with proper port area and you will be blown away.

Will they dig low like if you tuned to 30 or 32. An 18 inch

I have one tuned to 32 hz it plays down to like 25 with authority but after that it starts to slope off. Its a great daily sub too, loud as shit compared to my AQ subs I used to have in.

Does it need the whole 2500 watts to be happy? If you put a clean 1500 watts on it will it still bet pretty loud?

It'll be perfectly fine.

Does it need the whole 2500 watts to be happy? If you put a clean 1500 watts on it will it still bet pretty loud?

 

If you're only giving it 1500 rms, you could save some money and go with the model below.

 

But 1500 rms will be fine on it. Build your box on the bigger to compensate for the low power.

I have a havoc now but don't think it gets very loud

What's your box like? Changing your box can improve output.

It will get louder at 1500 watts than any other of the other subs in the line, it is one of their most efficient drivers...

 

The 2500 rating is a thermal capacity rating, it has nothing whatsoever to do with power requirements, at all, in the slightest.  Seriously. 

 

1500 watts isn't low power, for any driver.

I figured watt for watt it would be louder 89 db vs 94.9 db sensitivity

What's your box like? Changing your box can improve output.

First box 3.4 @33 hertz then 3.8@ 38

Now 7.5@ 28 in box for my 18.

How much port area?

13.5 x 4

watt for watt the mayhem would be louder.

13.5 x 4

Is that for the 18? That needs more port area.

You have no idea if that is too small for an 18, or any driver for that matter, without modeling for vent velocity with given power drive level.  There is no rule of thumb for port area...

That was for a 15 but it was a dual 2 at 1 ohm on skar 1500

lol

So a mayhem on a sundown 2500 wired at 1 or .5

Run it at 1 not half ohm.

Going to remove skar 1500 and put in sundown 2500. Going to hook it up to havoc see what happens. My system keep get more and more quiet. Do amp or subs slowly go away fade out?

Your just getting used to it.

Inb4 Havoc blows up