Amp tuning question

[vettetruck]

I recently got 2, 15 inch Orion XTRPRO's ( new 1000 watt 4 ohm model ) and a 2000 watt amp.

My question is, what are my optimal amp settings as far as subsonic filter, low pass and so forth to get the best low frequency response? I don't expect to bump the lows like Steve can but you know what I mean.

Oh, btw way they are in a channeled box in spec with Orion's recommendation.

Any and all advice would be greatly appreciated, thanks!

[kickass audio]

first of all.. what is your box tuned to (if it is ported)

Second, the subsonic filter is used to stop your sub from playing frequencies that are wayyy below its port tuning. For example, if you have a box tuned to 30Hz, you want to set your subsonic filter to 28Hz. If you dont use the subsonic filter just right you can bottom out your sub and start going through subs like i have (trust me, i go through subs like crazy because i was stupid with my setups)

The low pass setting on your amp is used to tell the amp what frequencies it should allow to go to the sub. Most people recommend setting it to 80Hz because at that setting, frequencies from 80Hz and below will go to the sub. And if you are using a amp for your door speakers you should set the High pass freq (HPF) to 80Hz so that frequencies from 80Hz and above will go to the door speakers. the last thing you want to have is to get a bass note to hit your door speakers and have a full range setting for your subs. it will sound like crap if it does.

Also if you dont have one yourself or know a buddy who has one, get a o-scope to set your gains properly. No matter what you may find on the internet (or even here for that matter) you can NEVER truly set your gains with a DMM (digital multi-meter) it just isnt accurate. I proved this to myself by using a chart that was online that said for a specific RMS rating of the amp and at a specific ohm load you should have XXX of voltage coming out from your speaker terminals. Well turns out that when i did that and hooked up my new o-scope to it, it had a clipped signal.

And if i were you, DO NOT use bass boost at all unless you have an o-scope to tell how far you can turn that up along with your gains to get a clean signal. clipping a speaker is very bad to do.

[vettetruck]

first of all.. what is your box tuned to (if it is ported)

Second, the subsonic filter is used to stop your sub from playing frequencies that are wayyy below its port tuning. For example, if you have a box tuned to 30Hz, you want to set your subsonic filter to 28Hz. If you dont use the subsonic filter just right you can bottom out your sub and start going through subs like i have (trust me, i go through subs like crazy because i was stupid with my setups)

The low pass setting on your amp is used to tell the amp what frequencies it should allow to go to the sub. Most people recommend setting it to 80Hz because at that setting, frequencies from 80Hz and below will go to the sub. And if you are using a amp for your door speakers you should set the High pass freq (HPF) to 80Hz so that frequencies from 80Hz and above will go to the door speakers. the last thing you want to have is to get a bass note to hit your door speakers and have a full range setting for your subs. it will sound like crap if it does.

Also if you dont have one yourself or know a buddy who has one, get a o-scope to set your gains properly. No matter what you may find on the internet (or even here for that matter) you can NEVER truly set your gains with a DMM (digital multi-meter) it just isnt accurate. I proved this to myself by using a chart that was online that said for a specific RMS rating of the amp and at a specific ohm load you should have XXX of voltage coming out from your speaker terminals. Well turns out that when i did that and hooked up my new o-scope to it, it had a clipped signal.

And if i were you, DO NOT use bass boost at all unless you have an o-scope to tell how far you can turn that up along with your gains to get a clean signal. clipping a speaker is very bad to do.

[vettetruck]

first of all.. what is your box tuned to (if it is ported)

Second, the subsonic filter is used to stop your sub from playing frequencies that are wayyy below its port tuning. For example, if you have a box tuned to 30Hz, you want to set your subsonic filter to 28Hz. If you dont use the subsonic filter just right you can bottom out your sub and start going through subs like i have (trust me, i go through subs like crazy because i was stupid with my setups)

The low pass setting on your amp is used to tell the amp what frequencies it should allow to go to the sub. Most people recommend setting it to 80Hz because at that setting, frequencies from 80Hz and below will go to the sub. And if you are using a amp for your door speakers you should set the High pass freq (HPF) to 80Hz so that frequencies from 80Hz and above will go to the door speakers. the last thing you want to have is to get a bass note to hit your door speakers and have a full range setting for your subs. it will sound like crap if it does.

Also if you dont have one yourself or know a buddy who has one, get a o-scope to set your gains properly. No matter what you may find on the internet (or even here for that matter) you can NEVER truly set your gains with a DMM (digital multi-meter) it just isnt accurate. I proved this to myself by using a chart that was online that said for a specific RMS rating of the amp and at a specific ohm load you should have XXX of voltage coming out from your speaker terminals. Well turns out that when i did that and hooked up my new o-scope to it, it had a clipped signal.

And if i were you, DO NOT use bass boost at all unless you have an o-scope to tell how far you can turn that up along with your gains to get a clean signal. clipping a speaker is very bad to do.

Thanks for being so thorough man. I got all the info about the tuning, the only thing im not sure of his how to know what my box is tuned to (<<< rookie ). Yes it is ported.

[00mgm]

You can get the dimensions of your box then the dimensions of your port and plug those into the torres calc and have a pretty decent idea.

[kickass audio]

youre welcome dude. i was once a noob as well, hell we all on here were noobs at one point or another.

For your box tuning see if you can do this for me. get me the dimensions of your box.

Height:

Depth:

Width:

Wood thickness:

also get me the port dimensions:

Width within the port:

Height within the port:

Length of the port:

There is a program on here called torres calculator that i use and it does a damn good job at telling you how to build/tune a box. in fact im using it as we speak to design my box im making this spring/summer for my single Ascendant Audio SMD 18" woofer.

If you can give me the information i asked for above i can instantly get you the tuning frequency of your box in a second.

[vettetruck]

Ok bro I'll get it in the morning. LOooonnggg day on the job. Appreciate the help once again. Are those subs capable of cranking out 30hz?

[kickass audio]

that i do not see a problem with them handling 30Hz but like i said see what your box is tuned to first of all. the box tuning is going to make a HUGE difference with your sound. if its off tune you will have shitty sound and if you play a note lower than the box's tuning you can bottom out the sub and do what i did with my subs and bottom them out and burn the coils and all that bad stuff. but the subs have a rating of 20Hz-2.5KHz for response so yes 30 should work just fine but i havent EVER used orion products so i cant speak off experience unfortunately.

[vettetruck]

that i do not see a problem with them handling 30Hz but like i said see what your box is tuned to first of all. the box tuning is going to make a HUGE difference with your sound. if its off tune you will have shitty sound and if you play a note lower than the box's tuning you can bottom out the sub and do what i did with my subs and bottom them out and burn the coils and all that bad stuff. but the subs have a rating of 20Hz-2.5KHz for response so yes 30 should work just fine but i havent EVER used orion products so i cant speak off experience unfortunately.

Ok, here's what I got:

17 in. from front to back ( measured on top )

16 in. tall (measured from front )

39 in. from left to right ( measured on top )

1 in. on wood thickness

as far as the port dimensions go, each 15 has its own channeled port with the following dimensions:

16 in. deep ( stuck the tape measurer into the port until i reached the back wall ) both sides

1.5 in wide for each port opening at the front of the box

14 in. tall for each port

box front looks like this , the " ||| " being the the channeled ports:

__________

| O ||| O |

````````

So hopefully that will give you an idea what im working with. Thanks bro.

[kickass audio]

ok, i just plugged the numbers into the torres calculator that is on here and i came up with a 40.65Hz frequency tuning per sub. so you should look at a 35-40Hz subsonic filter. Normally you would only go 2Hz less than your port tuning and NOTHING more than that because you can bottom out the subs and burn/blow the coils. If you havent already id recommend turning OFF any bassboost you may have on and for setting the gains on your amp make sure your headunit's EQ is set to FLAT. if you do not have it set to flat it will really screw it up when you try to tune the amp with the dmm later on. Unless you have an oscope i really dont recommend messing with any bass-boost or loudness equalization because they always cause a lot of clipping on your signal which in turn destroys your subs/speakers.