Auto tuba on legs

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Mikesummers
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Auto tuba on legs

#1 Post by Mikesummers » Tue Aug 25, 2020 8:01 am

Hi Bill etal. I just finished my autotuba with DCS255-4 10” Driver in a 19” wide box. Question: if i use the suggestion in the plans and turn it nose down on legs...how do i position it? I read your sub placement article and i think i get it for a sub sitting on the floor but on legs what is the story?
So the exit of the sub has 3 squared edges and one sharp edge...do i point the sharp edge into a room corner, into a wall , or what?

I’m still playing with low pass freq. setting and levels, but so far this thing is pretty impressive! Using the Daytonaudio DTA-2.1BT2 amp with old infinity rs10 bookshelf. My brother in law & i bought all the plans for $99 After drooling over your website for months. I am winning because my autotuba is done (except paint) and he is still deciding which one.

Thanks
MikeS

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Bill Fitzmaurice
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Re: Auto tuba on legs

#2 Post by Bill Fitzmaurice » Tue Aug 25, 2020 8:14 am

When the cab is on legs the floor becomes a wall as far as placement is concerned.

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Re: Auto tuba on legs

#3 Post by Mikesummers » Fri Sep 04, 2020 8:45 pm

So “z-axis” orientation is unimportant?

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Bill Fitzmaurice
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Re: Auto tuba on legs

#4 Post by Bill Fitzmaurice » Fri Sep 04, 2020 9:32 pm

It's not, the output pattern of subs is omnidirectional.

Mikesummers
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Re: Auto tuba on legs

#5 Post by Mikesummers » Mon Sep 07, 2020 1:03 pm

Thanks . One more question: per your sub placement article if i place my sub on the floor and point it into the corner i get +12db. Nose down On legs in a corner is it also +12db?

Btw i brought my autotuba and baby amp to my brotherinlaws house and hooked up to his system with vintage klipsch lascalas. He was very impressed and wants a sub more than ever now. It was on a wall and ~1/2 volume on the amp and that was plenty.

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Bill Fitzmaurice
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Re: Auto tuba on legs

#6 Post by Bill Fitzmaurice » Mon Sep 07, 2020 1:18 pm

A corner is a corner. Table Tuba is a much better match with LaScalas.

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Re: Auto tuba on legs

#7 Post by Mikesummers » Sun May 23, 2021 9:17 pm

Follow up…table tuba is rated performance 10, auto tuba is rated 7. But looking at the posted response charts, the autotuba seems to have the advantage?? Asking because of course i want another sub…its a disease.

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Re: Auto tuba on legs

#8 Post by Seth » Sun May 23, 2021 9:38 pm

Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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Tom Smit
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Re: Auto tuba on legs

#9 Post by Tom Smit » Sun May 23, 2021 11:15 pm

If it's for indoors, the build the TT. If it is for an automobile, then, build the AT.
TomS

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Bill Fitzmaurice
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Re: Auto tuba on legs

#10 Post by Bill Fitzmaurice » Mon May 24, 2021 6:42 am

Mikesummers wrote:
Sun May 23, 2021 9:17 pm
Follow up…table tuba is rated performance 10, auto tuba is rated 7. But looking at the posted response charts, the autotuba seems to have the advantage??
Different measurement protocols will give different results. All else being equal the TT goes an octave lower than the AT.

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Re: Auto tuba on legs

#11 Post by Mikesummers » Mon May 24, 2021 7:24 am

Great i think its gonna be the table tuba then. Thanks

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