Monitor audio silver 5i reversing crossover help

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Hi everyone!
I`ve got a pair of monitor audio silver5i for quite a few yers (16 to be exact), driven by a NAD319. Im quite happy with them, but i allways felt a lack of bass(my living room where they are is big, (4.6m(15ft) for 8m(26ff)).
I once owned a Kef psw3000 sub and i never be able to match them, but the fault was the sub (bought new, bass lumpy, delayed, full of adjustments fase freq. even had a remote but after a 8 years the smps of the amp fail and the amp burn the speaker)😡.

A few years ago i find a very interesting and recomended site, Elliott Sound Products - The Audio Pages (Main Index) with an article and several projects explaining the main advantages of building an active sistem. Since then i began to gather the material for that(p09,71,05).

I decided that i wanted a 3way active where i had two sealed subs in the midle (below the tv), and the monitor audio handle the mids and highs.
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I`ve got the board and some components soudered but im insecure about the frequencies to choose espescialy for mid/highs.
I know you might think that the crossover can had a lot of tweks to match the speakers but no, i it had only 3 coils and two caps.

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monitor_audio_silver_5i_crossover.jpg




note that on diagram the terminals are shunted becouse i don`t use biwiring/biamping. Re is the measures dc resistante. the coils i can`t measure.

So in conclusion i know this is a 2.5 way system. and the idea is a MMT speaker with two mids in parallel(they are phisically identical).
I have doubt if the fc is 2.6Khz or 3Khz.😕
For the low end i was thinking about 180hz (keep in mind that the subs will be allways in the midle so high crossing as imaging concern won`t be much of an issue)

As the sub concern, they will be a pair of 15" jbl gto 1502D that i`ve got lain around, driven from a P.A amp. in a 400l(14 cubic feet)sealed box with 30mm mdf in (slow)construction.
There is also a linkwitz tranform eq for the sub.

PS: Sorry some mistaques in writting, its school level froom Portugal.😱

Any help i will apreciate.
 
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Did you ever follow through with this? What was your experience?

I just got a pair of these myself. I've recapped the crossovers, and installed some rubber feet since mine were missing the bases.

My room is 15'x21', and I don't feel they lack bass. In fact, I think there's a mid bass boost, that makes lower vocals sound a bit too boosted.
 
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