Sundown Zv.4, DC XL, AQ/SQ HDC4.0, TC5200 comparison|3.7cubes, PR tuned to 25-28hz

[Bwap]

From what I understood, a sub with a pr has the response of a ported at a slightly lower db and without the possibility of turbulence.

What would be the issue with having only one PR?

 

[hispls 5,000+ posts]

The TC recommends 10-25hz tuning in 3.7cubes when using a PR.
Will the TC handle the power(Mmats 3500.05) when tuned this low?

Seeing as it takes a lot more power to make db at lower hz, would it even seem peaky to your ear with the PR tuned this low?

^If this is the case would a higher tuning(20-25hz), sound better?

The mmats doesn't have a subsonic filter, should I run Harrison fmods?.. if so what hz would you recommend?

Sorry about all the questions, I don't wanna miss anything lol..

WTF are you even listening to that you think you need to play down to 15hz ?

 

[Bwap]

WTF are you even listening to that you think you need to play down to 15hz ?

Its not that I need it to play down to 15hz, its that I want a flat response 30hz+ and still have the db gain from PR vs sealed.

 

[hispls 5,000+ posts]

Its not that I need it to play down to 15hz, its that I want a flat response 30hz+ and still have the db gain from PR vs sealed.

Nevermind. The whole premise here is very silly. You're trying to make a box that plays flat in anechoic chamber then going to throw it into a car and expect it to play flat? And you have a PR which you can simply add or remove mass to test any tuning you like after the box is constructed.

If you're dead set on having flat in-car response, invest in a good HU with 30 band EQ or invest in a stand alone 30 band EQ to cut down any peaks that you don't like, test multiple tunings by adding and removing mass from your PR.

 

[Bwap]

Also ported isn't an option because there isn't enough room for the port seeing as I would need to tuned low for a flat response.

One thing that gets me is that I have been running many different subs thru winisd, and I realize that there are two specific types of layouts on the winisd graph.

The 5200 has a similar response to many of the spl subs ported and PR. The 5200, HDC4.0, Zcon, Mayhem all have the same/similar layout making it seem like any box you make will create a very peaky response. However I see many people using these subs in boxes tuned 30+ and saying that the SQ is good. Makes me wonder if they would say the same thing if they heard it right beside the other common layout I seem to find using winisd, I assume its SQL, and these subs have very flat response no matter the tuning compared to the SPL subs listed. The "SQL" subs also appear to respond to boxes a lot better, rather than only getting above 0db for a few hz, they seem to float there throughout the full range of the sub hz, rolling off at tuning obviously.

Pretty much what im getting at is the 5200 is an SPL sub?... is it very musical or does it have to be reconed with more spiders and a stiffer surround before it has good SQ?

 

[Bwap]

Nevermind. The whole premise here is very silly. You're trying to make a box that plays flat in anechoic chamber then going to throw it into a car and expect it to play flat? And you have a PR which you can simply add or remove mass to test any tuning you like after the box is constructed.
If you're dead set on having flat in-car response, invest in a good HU with 30 band EQ or invest in a stand alone 30 band EQ to cut down any peaks that you don't like, test multiple tunings by adding and removing mass from your PR.

I guess my main debate is if its worth getting a pr or if I should just run it sealed?...

Then again another debate is if its going to be peaky in the car anyway, maybe I can manage a higher tuning ported and make it still sound good?

Idk any recommendation?.. PR seemed like the safest choice but I don't want to spend the money on a PR to find out there was a better option all along.

 

[hispls 5,000+ posts]

I guess my main debate is if its worth getting a pr or if I should just run it sealed?...
Then again another debate is if its going to be peaky in the car anyway, maybe I can manage a higher tuning ported and make it still sound good?

Idk any recommendation?.. PR seemed like the safest choice but I don't want to spend the money on a PR to find out there was a better option all along.

Port/PR is free output and low extension. If you want linear in-car response go with either and buy a good EQ source.

 

[mlstrass 5,000+ posts]

I guess my main debate is if its worth getting a pr or if I should just run it sealed?...
Then again another debate is if its going to be peaky in the car anyway, maybe I can manage a higher tuning ported and make it still sound good?

Idk any recommendation?.. PR seemed like the safest choice but I don't want to spend the money on a PR to find out there was a better option all along.

Yes that can be done and a while back many SQ guys over on diyma were doing that. Just takes a decent EQ for the natural valleys/peaks you'll need to straighten out...