1 sub vs 2 subs?

[Safe_Cracker 10+ year member]

The two subs on 300 rms has double the surface area but not the power to reach the excursion limit of the single sub with 300 rms. So at a higher volume level the two subs will lose control and spl while the single will be increasing in power/spl thus getting louder. I have a single sub setup and have been over this and have settled on a single GOOD sounding Treo SSX 15 powered by a SS XXX-6500, 16V @ 2ohm, reduces the amperage draw and keeps it as close to the 4500 rms mark I am looking for... Polo.. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Jameseypoo 5,000+ posts]

I'm confused.... Are you asking for

A) 1 sub @ 300 watts or 2 subs @ 300 watts combined (150 each)

B) 1 sub @ 600 watts or 2 subs @ 600 watts combined (300 each)

C) 1 sub @ 300 watts or 2 subs @ 600 watts combined (300 each)

 

[CRAZYCORNUTS18 10+ year member]

I'm confused.... Are you asking for
A) 1 sub @ 300 watts or 2 subs @ 300 watts combined (150 each)

B) 1 sub @ 600 watts or 2 subs @ 600 watts combined (300 each)

C) 1 sub @ 300 watts or 2 subs @ 600 watts combined (300 each)

1 sub at 300w vs 2 subs at 300w each(600 combined) so...C

 

[Jameseypoo 5,000+ posts]

I see. Option C should theoretically be 3 db louder.

 

[CRAZYCORNUTS18 10+ year member]

I see. Option C should theoretically be 3 db louder.

just becuz of surface area?

 

[SPLV 10+ year member]

Isn't it 3 db louder? Double the sub & power? Heard that somewhere..... on here I believe. Probably wrong. Hrmmm

This guy is absolutely correct. In any college level physics course, you will learn that doubling the power will not double the decibel level according to the following equation:

B= 10log[(Power/Area)/I_0]

You will find that doubling the power will only add 3dB. The "Area" found in the above equation is not the surface area of a subwoofer. Of course this is a very crude simplification of what actually happens in the real world, but expect no more than 3dB's with two subs vs one.

 

[CRAZYCORNUTS18 10+ year member]

This guy is absolutely correct. In any college level physics course, you will learn that doubling the power will not double the decibel level according to the following equation:
B= 10log[(Power/Area)/I_0]

You will find that doubling the power will only add 3dB. The "Area" found in the above equation is not the surface area of a subwoofer. Of course this is a very crude simplification of what actually happens in the real world, but expect no more than 3dB's with two subs vs one.

im not doubling the power though its just to subs that equal 600w togther(300 each) or is that wut you saying?

 

[Safe_Cracker 10+ year member]

"of one sub off 300w, and 2 subs on 300w each?"

Well the obvious after rereading his post would be the two would be louder all around as long as they were all the same subs... Polo.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[CRAZYCORNUTS18 10+ year member]

"of one sub off 300w, and 2 subs on 300w each?"


Well the obvious after rereading his post would be the two would be louder all around as long as they were all the same subs... Polo.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

well is the +/- 3db going to be a noticable diff.? and would it sound better?

 

[Safe_Cracker 10+ year member]

Of course it would be a noticeable difference but sounding better depends on how good the subs are. IMHO a trued sq system would consist of a single sub. This is because when you have a multiple sub system there are manufactured differences between any two subs, this can't be helped but these small difference can and will make audible differences creating distortion. Polo..

 

[CRAZYCORNUTS18 10+ year member]

Of course it would be a noticeable difference but sounding better depends on how good the subs are. IMHO a trued sq system would consist of a single sub. This is because when you have a multiple sub system there are manufactured differences between any two subs, this can't be helped but these small difference can and will make audible differences creating distortion. Polo..

im getting ppi pcx 12'' so should i get 1 or 2?

 

[Safe_Cracker 10+ year member]

I myself have a Treo SSX 15 sooo I guess I wouldn't even compare it to the PPI nore even look it that direction. Now I would look more to a pair of Treo SSI 10.22's in a sealed enclosure for total sq..Polo.

 

[DejaWiz 5,000+ posts]

What kind of amp you working with, CCN18?

 

[WhoSayWho? 5,000+ posts]

Of course it would be a noticeable difference but sounding better depends on how good the subs are. IMHO a trued sq system would consist of a single sub. This is because when you have a multiple sub system there are manufactured differences between any two subs, this can't be helped but these small difference can and will make audible differences creating distortion. Polo..

You sound pretty confident on that. Not so sure that is warranted.

 

[DejaWiz 5,000+ posts]

This is because when you have a multiple sub system there are manufactured differences between any two subs, this can't be helped but these small difference can and will make audible differences creating distortion.

Realistically, any naturally occurring varations from manufacturing that would cause variations in playback which equated to distortion would be so minute that a human would not be able to discern them.

An average human usually can't detect an audible difference in a full-range speaker until THD reaches about 3 to 5%. Usually takes even more THD in the sub bass frequencies....