Sign In
Create Account
Welcome to SSA Car Audio Forum
Register now to gain access to all of our features. Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more. If you already have an account, login here - otherwise create an account for free today!
Register now to gain access to all of our features. Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more. If you already have an account, login here - otherwise create an account for free today!
#1
Posted 10 June 2012 - 11:40 AM
alexj01_83
-
- SSA Supporter L2
-
- 220 posts
Member
- Gender:Male
- Location:Fayetteville N.C.
I have Dayton Audio spa 500 plate amp for power, and the sub I will be using is a sa-12 I have lying around. This will be used in my home theater. My questions are, what is the typical tunning freq with home audio. (I will also listen to some music occasionally) I have also noticed that in home theater that the boxes are larger than typically used in a car audio setup. This will be my first ht project and I was wondering if some one could point me in the right direction. ( box designing literature/software) Thanks in advance.
-83 olds 88 455 with the flowmasters
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
Back to top
#2
Posted 10 June 2012 - 11:45 AM
///M5
-
- SSA Audio Tech Team
-
- 58,673 posts
SSAudio Level 14
- Gender:Male
- Location:MN
If it's for movies the box is completely different than for music. Movies you should port somewhere in the low teens. Have to model the driver and watch output, extension, excursion, port velocity, and use of power to really make recommendations.
I'd also HIGHLY recommend an SSF for Home Theater use otherwise the ultra low stuff can easily send you beyond xmax.
I'd also HIGHLY recommend an SSF for Home Theater use otherwise the ultra low stuff can easily send you beyond xmax.
Please read my posts with care. I do not pull punches, but state exactly what is on my mind. My goal is to make you think, make you try harder and to improve yourself AND this forum. This doesn't mean that I don't like you, am being aggressive towards you, or have any other hidden meaning. Instead look at it as me trying to make you better. In no way at all should your butt be hurt by my posts. If so, read it differently. You agreed to taking criticism when you joined, doesn't mean that you have to choose to take it personally. The more effort you put into your threads and posts, the more I will in return. What you get out of it is up to you.
New members topics >> SSA Membership Terms + New Topic Guidelines + New Member Welcome
I was. Super proud I didn't shit my pants. I was sure it was going to happen.
We sit on the same bench. Your "asshole" just makes me curious.
#3
Posted 10 June 2012 - 11:47 AM
95Honda
-
- SSA Audio Tech Team
-
- 1,414 posts
Young Grasshopper
- Gender:Male
- Location:Colorado Springs
Design your box with the goal of low end extension and tune around 20Hz if you can. This will make for a bigger box, but you will have a flatter response with less ripple and better low end extension.
You have enough power that the overall alignment efficiency won't be a huge deal.
I haven't looked at the SA12 T/S parameters, but most "car audio" subs will work fine as long as the Fs isn't absurdly high and they have a usable Vas (usable that the box will be large enough to accomodate an appropriate size vent and not have a huge bump in response)...
You have enough power that the overall alignment efficiency won't be a huge deal.
I haven't looked at the SA12 T/S parameters, but most "car audio" subs will work fine as long as the Fs isn't absurdly high and they have a usable Vas (usable that the box will be large enough to accomodate an appropriate size vent and not have a huge bump in response)...
#4
Posted 10 June 2012 - 11:49 AM
95Honda
-
- SSA Audio Tech Team
-
- 1,414 posts
Young Grasshopper
- Gender:Male
- Location:Colorado Springs
Yes SSF like M5 said.
I ruined a pair of Tumults (triple joint failure) in boxes tuned in the high teens for the simple reason I didn't have a SSF. And I was watching "The Polar Express" of all things... And these were drivers with almost 3" of linear stroke...
I ruined a pair of Tumults (triple joint failure) in boxes tuned in the high teens for the simple reason I didn't have a SSF. And I was watching "The Polar Express" of all things... And these were drivers with almost 3" of linear stroke...
#5
Posted 10 June 2012 - 12:06 PM
alexj01_83
-
- SSA Supporter L2
-
- 220 posts
Member
- Gender:Male
- Location:Fayetteville N.C.
"Have to model the driver and watch output, extension, excursion, port velocity, and use of power to really make recommendations." How would I go about doing that.
"SSF" Please explain.
-83 olds 88 455 with the flowmasters
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
#6
Posted 10 June 2012 - 12:09 PM
95Honda
-
- SSA Audio Tech Team
-
- 1,414 posts
Young Grasshopper
- Gender:Male
- Location:Colorado Springs
SSF = Sub Sonic Filter.
It is a highpass filter. In alignments that do not provide enough loading to the driver below resonance, this filter reduces output to prevent mechanical failures.
It is a highpass filter. In alignments that do not provide enough loading to the driver below resonance, this filter reduces output to prevent mechanical failures.
#7
Posted 10 June 2012 - 12:18 PM
///M5
-
- SSA Audio Tech Team
-
- 58,673 posts
SSAudio Level 14
- Gender:Male
- Location:MN
Otherwise ported and HT = driver death.
Please read my posts with care. I do not pull punches, but state exactly what is on my mind. My goal is to make you think, make you try harder and to improve yourself AND this forum. This doesn't mean that I don't like you, am being aggressive towards you, or have any other hidden meaning. Instead look at it as me trying to make you better. In no way at all should your butt be hurt by my posts. If so, read it differently. You agreed to taking criticism when you joined, doesn't mean that you have to choose to take it personally. The more effort you put into your threads and posts, the more I will in return. What you get out of it is up to you.
New members topics >> SSA Membership Terms + New Topic Guidelines + New Member Welcome
I was. Super proud I didn't shit my pants. I was sure it was going to happen.
We sit on the same bench. Your "asshole" just makes me curious.
#8
Posted 10 June 2012 - 12:18 PM
alexj01_83
-
- SSA Supporter L2
-
- 220 posts
Member
- Gender:Male
- Location:Fayetteville N.C.
SSF = Sub Sonic Filter.
It is a highpass filter. In alignments that do not provide enough loading to the driver below resonance, this filter reduces output to prevent mechanical failures.
OK thanks.. How would I model that into my plate amp? I will check if my receiver has the capability to perform this function.
-83 olds 88 455 with the flowmasters
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
#9
Posted 10 June 2012 - 12:21 PM
alexj01_83
-
- SSA Supporter L2
-
- 220 posts
Member
- Gender:Male
- Location:Fayetteville N.C.
Otherwise ported and HT = driver death.
Ha ha
-83 olds 88 455 with the flowmasters
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
#10
Posted 10 June 2012 - 12:23 PM
///M5
-
- SSA Audio Tech Team
-
- 58,673 posts
SSAudio Level 14
- Gender:Male
- Location:MN
Neither your plate amp or receiver have that option. You need to buy something like a miniDSP or if you want something pre-configured a Reckhorn B-2.
Please read my posts with care. I do not pull punches, but state exactly what is on my mind. My goal is to make you think, make you try harder and to improve yourself AND this forum. This doesn't mean that I don't like you, am being aggressive towards you, or have any other hidden meaning. Instead look at it as me trying to make you better. In no way at all should your butt be hurt by my posts. If so, read it differently. You agreed to taking criticism when you joined, doesn't mean that you have to choose to take it personally. The more effort you put into your threads and posts, the more I will in return. What you get out of it is up to you.
New members topics >> SSA Membership Terms + New Topic Guidelines + New Member Welcome
I was. Super proud I didn't shit my pants. I was sure it was going to happen.
We sit on the same bench. Your "asshole" just makes me curious.
#11
Posted 10 June 2012 - 12:25 PM
alexj01_83
-
- SSA Supporter L2
-
- 220 posts
Member
- Gender:Male
- Location:Fayetteville N.C.
box designing literature/software ????
-83 olds 88 455 with the flowmasters
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
#12
Posted 10 June 2012 - 12:26 PM
///M5
-
- SSA Audio Tech Team
-
- 58,673 posts
SSAudio Level 14
- Gender:Male
- Location:MN
WinISD is what I would use, but don't consider it design software but modeling software. IE, don't let it pick the port, box size, power, eq and such. That is a job for the user.
Please read my posts with care. I do not pull punches, but state exactly what is on my mind. My goal is to make you think, make you try harder and to improve yourself AND this forum. This doesn't mean that I don't like you, am being aggressive towards you, or have any other hidden meaning. Instead look at it as me trying to make you better. In no way at all should your butt be hurt by my posts. If so, read it differently. You agreed to taking criticism when you joined, doesn't mean that you have to choose to take it personally. The more effort you put into your threads and posts, the more I will in return. What you get out of it is up to you.
New members topics >> SSA Membership Terms + New Topic Guidelines + New Member Welcome
I was. Super proud I didn't shit my pants. I was sure it was going to happen.
We sit on the same bench. Your "asshole" just makes me curious.
#13
Posted 10 June 2012 - 01:29 PM
alexj01_83
-
- SSA Supporter L2
-
- 220 posts
Member
- Gender:Male
- Location:Fayetteville N.C.
what do i need to look for in the graph, what am I trying to achieve
-83 olds 88 455 with the flowmasters
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
-Alpine deck ipod changer
-Sundown 100.4
(Cell phone connection)
#14
Posted 10 June 2012 - 01:49 PM
95Honda
-
- SSA Audio Tech Team
-
- 1,414 posts
Young Grasshopper
- Gender:Male
- Location:Colorado Springs
Wherever you tune your are going to see a drop in response below resonance. It will be somewhere around 24/db per octave (so if response starts to drop at 20Hz @ 90db it will be be 76db by 10Hz) and you will need to mirror the inverse of this with your SSF. So if it were textbook you could just apply a 24/db per octave highpass filter that starts rooling off right below your resonance point.
Or, just pick a highpass filter like a Harris F-Mod that is roughly the same (or slightly less than) cutoff of your enclosure tuning.
Or tune real low liek we said (teens) and don't give it a ton of power and be happy with it.
Or go sealed and never worry about it...
Or, just pick a highpass filter like a Harris F-Mod that is roughly the same (or slightly less than) cutoff of your enclosure tuning.
Or tune real low liek we said (teens) and don't give it a ton of power and be happy with it.
Or go sealed and never worry about it...
#15
Posted 10 June 2012 - 02:13 PM
///M5
-
- SSA Audio Tech Team
-
- 58,673 posts
SSAudio Level 14
- Gender:Male
- Location:MN
As low as extension as possible while maintaining output and not sending your driver into over excursion. At some point tuning lower will no longer buy you anything which you'll see as you start to play around. Best way is to make a few different designs and put them on the screen all at once. I sort of pick both extremes and then use the third to tinker in between and see what compromises I'll choose versus others.what do i need to look for in the graph, what am I trying to achieve
Please read my posts with care. I do not pull punches, but state exactly what is on my mind. My goal is to make you think, make you try harder and to improve yourself AND this forum. This doesn't mean that I don't like you, am being aggressive towards you, or have any other hidden meaning. Instead look at it as me trying to make you better. In no way at all should your butt be hurt by my posts. If so, read it differently. You agreed to taking criticism when you joined, doesn't mean that you have to choose to take it personally. The more effort you put into your threads and posts, the more I will in return. What you get out of it is up to you.
New members topics >> SSA Membership Terms + New Topic Guidelines + New Member Welcome
I was. Super proud I didn't shit my pants. I was sure it was going to happen.
We sit on the same bench. Your "asshole" just makes me curious.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users
