zanekeimigdesigns Posted April 26, 2016 Report Share Posted April 26, 2016 Ive read many articles that state, that subwoofers that have low qts and qms numbers are better sound quality subs, is there any validity to this? If that is so, what can i do to make a sub that doesnt have what people are saying is "ideal" qts and qms values (qts of .40 and lower, qms of 7 and lower) sound loud with good sq? Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted April 27, 2016 Report Share Posted April 27, 2016 QTS and QMS aren't really quality measurements, they measure how quickly the sub dissipates energy. They have more to do with what type and size of a box the sub is going to perform best in more than anything. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
hdorre Posted April 27, 2016 Report Share Posted April 27, 2016 They have more to do with what type and size of a box the sub is going to perform best in more than anything. On 5/8/2011 at 7:38 PM, Kranny said: On 5/8/2011 at 7:35 PM, 'Maxim' said: It hurts me inside when I read stuff like this and remember you're 15 LMFAO so true Mitsubishi 3000GT (Old Build) Headunit: Pioneer 80PRS Frontstage: (2) McLaren Audio MLT-2 Tweeters & (4) PRV Audio MR Series Neo 6.5" Mids Substage: 4 15" Hybrid Subs - Tantric Motors & Sundown Softies Amps: Banda 2.4D Amp (Tweets), American Bass VFL 350.4 (Mids), and (2) Ampere 3800s Electrical :Singer 260A Alt & JY Power Lithium 2005 Chevy Colorado Ext Cab Headunit: Pioneer 80PRS Frontstage: 4 PRV 700Ti Tweets & 6 10" Delta Mids on 3000wrms Substage: 6 Fi BTL 18s in a 4th Order Walkthrough on 3 Wolfram 4500s Electrical: Singer "390" and JY Power My Official Feedback Thread Link to comment Share on other sites More sharing options...
Quiet Posted April 27, 2016 Report Share Posted April 27, 2016 If you're starting out with T/S parameters, start with Qts. This just explains with a number figure the ability of the motor structure to control the cone. Basically, the lower the Qts, the more control the motor has over the cone. This can be loosely used to judge a subs ability to perform in a given type of enclosure. >0.4 better sealed or 4th order <0.4 better ported or 6th order Now before someone gives me shit over it, these are just starting figures. Plenty of ported systems run subs over .4 Qts and then there are some great sounding sealed boxes with subs under .4. Until you understand the relationship, this is a good starting point for you. 2007 Pacifica Rebuild. Less quiet. Still not loud. Link to comment Share on other sites More sharing options...
hdorre Posted April 27, 2016 Report Share Posted April 27, 2016 >0.4 better sealed or 4th order <0.4 better ported or 6th order I prefer .5+ for 4ths, but agree with the rest. Another thing to consider is EBP, which is fs/qes. .55 and under is better suited for 4ths. On 5/8/2011 at 7:38 PM, Kranny said: On 5/8/2011 at 7:35 PM, 'Maxim' said: It hurts me inside when I read stuff like this and remember you're 15 LMFAO so true Mitsubishi 3000GT (Old Build) Headunit: Pioneer 80PRS Frontstage: (2) McLaren Audio MLT-2 Tweeters & (4) PRV Audio MR Series Neo 6.5" Mids Substage: 4 15" Hybrid Subs - Tantric Motors & Sundown Softies Amps: Banda 2.4D Amp (Tweets), American Bass VFL 350.4 (Mids), and (2) Ampere 3800s Electrical :Singer 260A Alt & JY Power Lithium 2005 Chevy Colorado Ext Cab Headunit: Pioneer 80PRS Frontstage: 4 PRV 700Ti Tweets & 6 10" Delta Mids on 3000wrms Substage: 6 Fi BTL 18s in a 4th Order Walkthrough on 3 Wolfram 4500s Electrical: Singer "390" and JY Power My Official Feedback Thread Link to comment Share on other sites More sharing options...
Quiet Posted April 27, 2016 Report Share Posted April 27, 2016 >0.4 better sealed or 4th order <0.4 better ported or 6th order I prefer .5+ for 4ths, but agree with the rest. Another thing to consider is EBP, which is fs/qes. .55 and under is better suited for 4ths. No I get it, and also depends on what kind of cabin gain you're working with too. Just giving him some starting off points. OP, this is what I meant by "starting off"... your experience will give you your own mind-track on how Qts and Qes works, and what works for you. 2007 Pacifica Rebuild. Less quiet. Still not loud. Link to comment Share on other sites More sharing options...
zanekeimigdesigns Posted April 27, 2016 Author Report Share Posted April 27, 2016 Alright, well do you guys recommend a box program i can buy to maybe help me out? Link to comment Share on other sites More sharing options...
zanekeimigdesigns Posted April 27, 2016 Author Report Share Posted April 27, 2016 Alright, well do you guys recommend a box program i can buy to maybe help me out? Link to comment Share on other sites More sharing options...
Quiet Posted April 27, 2016 Report Share Posted April 27, 2016 It's old school, but i like WinISD beta. It's basic and free, which works. There are lots of box building apps out there but I like this because it's output is predictable. 2007 Pacifica Rebuild. Less quiet. Still not loud. Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted April 27, 2016 Report Share Posted April 27, 2016 WinISD and Hornresp are free. Between the two of them they should do 99.6% of anything you would want to do. You would just need to put in the effort to learn how to use them. HornResp requires a bit more effort than WinISD does. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
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