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Subwoofers, Bass, and Transducers > vtf3 mk3 came today wow it's a monster (pics)
Kevin12586's Avatar Kevin12586 09:44 PM 05-12-2007
lvisneau, when you did your test w/out turbo, where you in max output or extension? It looks like max output, to compare apples to apples, if it was max output could you run your sub in max extension without turbo?

Thanks
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lvisneau's Avatar lvisneau 06:23 AM 05-13-2007
Quote:
Originally Posted by Kevin12586 View Post

lvisneau, when you did your test w/out turbo, where you in max output or extension? It looks like max output, to compare apples to apples, if it was max output could you run your sub in max extension without turbo?

Thanks

I was in max output.
so i did a comparison w/ turbo in max ext and w/out in max ext w/port plug. and the #'s were identical. maybe the turbo kicks in under 16 hz. but i don't have tones under 16 nor do i need under 16- do I? anyways, the turbo will be returned.
xcjago's Avatar xcjago 10:11 AM 05-13-2007
The freq response should be the same in max extension mode whether you use the turbo or not. But with turbo, it will play louder without port noise.
Megalith's Avatar Megalith 10:13 AM 05-13-2007
Looks like a laundry machine.
lvisneau's Avatar lvisneau 10:52 AM 05-13-2007
louder at 16hz and below only?
xcjago's Avatar xcjago 08:31 PM 05-13-2007
Well, port noise can occur at somewhat higher frequencies as well. I would say the turbo helps at 18hz and below.
lvisneau's Avatar lvisneau 05:55 AM 05-14-2007
Quote:
Originally Posted by xcjago View Post

Well, port noise can occur at somewhat higher frequencies as well. I would say the turbo helps at 18hz and below.

hmmmm, now i completely confused about keeping this thing. maybe i'll do one more test for port noise before i send it back.
spyboy's Avatar spyboy 06:06 AM 05-14-2007
I expect to keep my Turbos. Adding a foot of additional dual 4 inch ports makes a difference. Sometimes I blow the port plugs out of my 'HOs, when I don't have the Turbos attached.

All the Best
lvisneau's Avatar lvisneau 12:27 PM 05-14-2007
Quote:
Originally Posted by spyboy View Post

I expect to keep my Turbos. Adding a foot of additional dual 4 inch ports makes a difference. Sometimes I blow the port plugs out of my 'HOs, when I don't have the Turbos attached.

All the Best

hey spyboy, how can i get that house shakin spl and the low fr. all at once. can i use the turbo in max output mode? would that help at all. should i use the turbo and just turn it up to fill in the gap? i'm pullin out my hair here.
Kingrsl's Avatar Kingrsl 01:07 PM 05-14-2007
The turbos are only for max extension mode. You can do damage to the amp if the settings are incorrect from what I hear. I've since reconsidered and I'm keeping my turbos. All I needed was to do a little more tweaking with room placement. I don't feel i'm losing enough above 20hz for me not to use the turbo. It doesn't hurt having dual subs either.
lvisneau's Avatar lvisneau 01:46 PM 05-14-2007
Quote:
Originally Posted by Kingrsl View Post

The turbos are only for max extension mode. You can do damage to the amp if the settings are incorrect from what I hear. I've since reconsidered and I'm keeping my turbos. All I needed was to do a little more tweaking with room placement. I don't feel i'm losing enough above 20hz for me not to use the turbo. It doesn't hurt having dual subs either.

thanks for the reply king, i'm just about to put the turbo back on and try again.
xcjago's Avatar xcjago 01:58 PM 05-14-2007
Using the Turbo in max output mode would actually be ok. It will give you performance somewhere in between the normal max extension mode and max output.

The only time where you can damage the sub is if you put it in max extension mode with both ports open and no turbo.
lvisneau's Avatar lvisneau 02:11 PM 05-14-2007
Quote:
Originally Posted by xcjago View Post

Using the Turbo in max output mode would actually be ok. It will give you performance somewhere in between the normal max extension mode and max output.

The only time where you can damage the sub is if you put it in max extension mode with both ports open and no turbo.

gonna check it right now!
lvisneau's Avatar lvisneau 02:43 PM 05-14-2007
tried it with some hard hitting movies and it seems to hit much harder w/out the turbo. maybe i'll put it in the attic for now.
Kingrsl's Avatar Kingrsl 04:00 PM 05-14-2007
What movies were you testing with? Most movies have the heavy bass in the 20hz and higher range. There are some movies where there are some sub 20hz effects and it's definately noticeable at my house between max extension and max output modes: Casino Royale, Pulse, Flight of the Phoenix, Pearl Harbor, Jurassic Park 3, and WOTW to name a few. It all comes down to personal preference though.
Mathesar's Avatar Mathesar 05:56 PM 05-14-2007
Quote:
Originally Posted by lvisneau View Post

tried it with some hard hitting movies and it seems to hit much harder w/out the turbo. maybe i'll put it in the attic for now.

Ya I have the same experience, whenever I compare movies or music there's noticeably more impact without the turbo applied, but as mentioned above some movies benefit from the turbo which is one of the reasons I bought a 2nd sub and kept the turbo.
lvisneau's Avatar lvisneau 03:00 PM 05-30-2007
I have recently put my turbo back on for good. it seems to get a flatter response. i noticed that some frequencies were way too loud and w/turbo it was better, still room shaking but shaking at all frequencies not just 1.
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