would this be an upgrade??

[Justin braaapp]

I want to upgrade my current system which is an sp4 15 wired to 1 ohm on a crescendo bc 3500 and my electrical is up to par. I have a chance to get a second sp4 15 and I would be wired down to a half ohm on my 3500. My question is that someone told me that unless I upgrade my power I wont hear an audible difference with just adding a second 15 and going to a half ohm. I find it pretty hard to believe that I wouldn't move any more air or notice an audible difference but does anybody on here have an idea of what I can expect? I just don't want to waste my money on a second 15 if I wont notice a difference. Thanks for the help

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[Justin braaapp]

I should have said I will make a box that's optimal for the two 15's

 

[shauncox26]

Proly won't be much difference to ur ear but it will move more air. u will Proly feel the difference more than hear it.

 

[Justin braaapp]

Proly won't be much difference to ur ear but it will move more air. u will Proly feel the difference more than hear it.

would it be more worth it to downgrade to some hdc3 18's you think or stick to the sp4's and double the power down the road?

 

[southport2014 10+ year member]

that's a tough one. The hdc3 18s would move more air. They should be louder then the sp4.

 

[Justin braaapp]

that's a tough one. The hdc3 18s would move more air. They should be louder then the sp4.

I'm just not sure on the sound quality of soundqubeds stuff, I've never used them before. My sp4's are really punchy and musical on country and rock

 

[shauncox26]

soundqubed is a nice choice but u still Proly won't notice much difference audibly i would do the two sp4's so u can double the power down the road. now as far as sq with the sq subs my sdc was quite musical it really surprised me. but there again it wasn't a hdc3 so i can't comment on their sq.

 

[Justin braaapp]

soundqubed is a nice choice but u still Proly won't notice much difference audibly i would do the two sp4's so u can double the power down the road. now as far as sq with the sq subs my sdc was quite musical it really surprised me. but there again it wasn't a hdc3 so i can't comment on their sq.

Just clarifying you think it would be better to stick with the two sp4's and double the power someday rather than but two hdc3 18's an run them off my current power?

 

[soundstreamer 10+ year member]

Rule of thumb is that doubling cone area without a power increase should be 3db gain(with proper enclosures). That is audible in most cases under 150db. And, going to .5ohm will be giving you a touch more power.

 

[Justin braaapp]

Rule of thumb is that doubling cone area without a power increase should be 3db gain(with proper enclosures). That is audible in most cases under 150db. And, going to .5ohm will be giving you a touch more power.

Okay cool thank you