Conversion of 30" T39 Dual 3012 LF to Single

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SethRocksYou
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Re: Conversion of 30" T39 Dual 3012 LF to Single

#16 Post by SethRocksYou » Sun May 27, 2018 6:13 pm

Richness wrote:
Sat May 26, 2018 2:07 pm
I wanna get plans but not sure which.
my two cents...
Buy the CD with all the plans. Use the information in the plans to help make the decision of which cabs to build. Incidentally, it's not bad reading material.

Richness
Posts: 19
Joined: Mon Dec 04, 2017 10:16 am

Re: Conversion of 30" T39 Dual 3012 LF to Single

#17 Post by Richness » Mon May 28, 2018 3:16 pm

[/quote]

It isn't absolutely necessary to biamp tops. If you run them all in mono, you can use one side of an amp as a power shade for the melded array cabs, and one for the CD's. With ASD's, the crossover filters in the plans are at the same point as the melded (but with different values component wise).

Subs.
Put it this way. If you elected to build 2 x T39 dual loaded subs at maximum width of 56", you would notice a big difference in output!
Really, a 30" wide dually is the same as 2 x 15" wide singles. 15" wide is the minimum width for a 12" loaded T39, so really, all you have done is built a dual loaded slim.
Even the 38" wide is basically 2 x 19" wide cabs together.
I've noticed a significant change in output when comparing a 20" wide T39, to a 28" wide single.

Noticeably louder is only +3dB. Yes, your plan will make that. But it's not really a lot of return for all the effort involved in modding the 30" cabs and building a new 38" wide cab.

It sound like your carry space has increased. Fill it with a pair of as wide a dual loaded cab you can fit into that space to make some significant moves in output
[/quote]

Thanks for all the great input, help and suggestions. I have already invested in the 38" dual loaded but will convert the 30"s to single and use the extra pair for another dual 38" or more. A bit later when I order Omni plans and start making sawdust I will fully decide on best route for my personal needs.
2xT39 30'' 3012LF Dual
1xT39 38" 3012LF Dual

Richness
Posts: 19
Joined: Mon Dec 04, 2017 10:16 am

Re: Conversion of 30" T39 Dual 3012 LF to Single

#18 Post by Richness » Mon May 28, 2018 3:24 pm

SethRocksYou wrote:
Sun May 27, 2018 2:08 pm
Pretty sure you'd want to build 4 more 30" singles to maximize on the drivers you already have. V-plated, that's a seven and a half foot tall stack.

FWIW, even though all the marketing and comparative graphs state 30" as the widest and most effective single, the new plans state that 28" is the new magic number. Just food for thought.
I started off with this dual option looking for a less work option meaning building less cabs and also considered my carry space. I will improve carry space but still didn't want to build 6 cabs. Lol. 4 of these are ample for the 500+ crowd I would need them for. Bass is addictive so maybe down the road I may build wide singles only. Thanks for your input and help.
2xT39 30'' 3012LF Dual
1xT39 38" 3012LF Dual

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