Is it possible to have SQ subwoofer using 15"?

[DBfan187 5,000+ posts]

Kinda.It just seems (like Slaugh said) that most, not all, SQ people seem to lean toward 10". Just wondered why.

*edit* Thanks ^^

space reasons.
most larger woofers require a larger space to perform. Also most SQ installsm are juged on looks. A SQ system with a large inclosure could get points deducted.

 

[azbass 5,000+ posts]

ill let you know what my car sounds like with 2 brahma 15"s

 

[SSS 18734 5,000+ posts]

Personally... i'd rather have a single ported 18" woofer in my hatch than two twelves.

 

[audiolife 5,000+ posts]

lol umm several cars have won sq world championships and yes the woofers were on

18's earl wills idw i know for a fact won it my old car (was ron burden's at the time)took 2 second places in usac and iasca world finals too a guy that retired undefeated. size of the driver doesnt matter as much as it is applied

 

[justsayk 10+ year member]

You were on to something when you were talking about the substage drowning out the front stage. SQ systems are designed to be balanced- not to have eleventy billion deebeez worth of bass and only 100 db's from the front stage. Generally, you don't need a 15" or 18" to keep up with your front stage (unless you put a lot of effort into your front stage midbass setup). But a 15" can be every bit as "quick" as a 10. It's all about the enclosure in relation to the specific sub you have. Also, generally speaking, a 15" sub will have less distortion at the same given output level (if the two subs have the same specs) because the 15" won't have to move as much as the 10" to get to the same volume.

 

[johnecon2001 5,000+ posts]

I've primarily used smaller woofers in competition. I'll be going to 8's this year. I've run tens (Alumapro MX's) and twelves (Adire Shiva/DPL, Alumapro RX).

I've got the CDT carbon 8 to try and with some tuning, the RE RE8's as well.

 

[Tirefryr 10+ year member]

The SpeakerWorks Buick(one of the most well-known championship vehicles) used 15s for subbass.

 

[audiolife 5,000+ posts]

eric stevens the guy that owns the rat pack van (solo 15's) lol there is alot of cars using big drivers even old school 15s in the kicks

 

[Rattlebrain 10+ year member]

One reason I had thought about an 18" is the fact that I don't necessarily care that the volume can level a house from 100 feet away. I like bass that even at lower levels can shake something. One time I was sitting in my apartment watching TV and I kept feeling something strange. I turned the volume on the TV down and could barley hear the bass coming from the car outside but it was rattling everything. He had two 18" in the back seat. Looked like crap but wow. I went outside and it still was not very loud but you could feel it.

 

[audioholic 5,000+ posts]

What people tend to forget about when discussing SQ systems is that the ENTIRE SYSTEM must sound well TOGETHER. SQ judging is done at relatively low listening levels (126db'ish iirc) and frankly, you dont need a high-powered front stage to be capable of that. Why build a competition SQ system capable of more output than needed, when the focus of that install is SQ, not SPL or even SQL. Therefore, you don't necessarily need a huge woofer to blend the subbass properly with the front stage. Remember, in a true SQ situation, the subbass is meant to accentuate the music, not dominate it. In a true SQ system, all the midbass comes from up front, and only the lowest subbass comes from the rear (like 50hz and below, not the 80-120hz and below of many daily systems), most times you simply don't need a 15 or 18 to accomplish your goals (extension and freq response at a given output level). And lets face it, many people have a bias against large cones for SQ. Frankly, alot of people do still believe a large subwoofer cannot possibly sound as good/fast/whatever as a smaller coned sub. So say a SQ judge has this preconceived notion about large coned subs, do you think he will listen to and judge a person's system without bias when he see's some 18" subwoofer in the trunk? This is a real fear of some SQ competitors, discrimination from judges with pre-conceived prejudices. Horn people have to deal with this alot too.

Determining the size of the sub for your SQ system should be based on frequency response needed and proper blending (output). If your front stage has 8" dedicated mids, you wont likely gain a ton of extension from 8" subwoofers. Conversely, if your front stage consists of 4x6's (and if that is the case may God have mercy on your soul), they wont likely blend well with an 18" subwoofer. Like everything, there is no best. No best sub for every SQ system, and no best sub size for every SQ system. The guys who really know what they're doing don't think "I need a 10 cuz they have m4d SQ!" when building their award winning systems.

 

[audiolife 5,000+ posts]

sq judges dont look in your trunk though not suppost to anyway only thing they are to do is sit down ask you how to adjust the volume and shut the door

 

[Rattlebrain 10+ year member]

Dan Wiggins

/raises hand/ Question.

It says that induction is key (basically) Would that mean the lower the ohm load of a speaker is the better?

I am not sure is why I ask.

I know car audio but when it gets to a point, sometimes I get lost. I'm still a student. But I'm always willing to learn.

 

[joshpoints 10+ year member]

Kinda.It just seems (like Slaugh said) that most, not all, SQ people seem to lean toward 10". Just wondered why.

*edit* Thanks ^^

Because you can buy even cheap 10's with cheap motors and get good sq. The motor doesn't have to be as good on a 10 because the smaller cone doesn't require it. If you get a 15 and want sq you probably will have pay more because you need to get one that actually has a motor that was made for the added cone area. A sub lacking a good motor is going to give you sub par performance and sluggish or muddy bass reproduction.

 

[audiolife 5,000+ posts]

it isnt the sub as much the prob with sq as it is the box for the sub you guys put wayyyyyyy too much emphisis on equipment WAY to much to me i find it funny

 

[Rattlebrain 10+ year member]

it isnt the sub as much the prob with sq as it is the box for the sub you guys put wayyyyyyy too much emphisis on equipment WAY to much to me i find it funny

OK Fine but..I even agree to an extent....my question above still stands