2 way electronic crossover modification

[merlin el mago]

I have this 2 way electronic crossover designed for HT subwoofer that I want to modifie the cut of high & low frecuencies because I want to use for classic 2 way loudspeaker (for example cut for highs 2Khz).

[sreten]

Hi,

You just make all the capacitors a lot smaller, but FWIW no way will
you end up with a c/o suitable for a high quality classic 2-way.

rgds, sreten.

Shown is the transfer functions of a quality two way,
functions are some form of second order electrical but the
c/o 4th order L/R acoustic combined with driver responses :

[bobodioulasso]

Linkwitz-Riley Electronic Crossover

End of page, download LR calculator.

Caution: IC1b and IC2a form a high pass filter.
Might be to leave them as this.
or transform them into low pass 2nd order

[bobodioulasso]

This high pass looks strange here!
or wrong C values.
Better to copy fig 1 in the ESP page.

[cyclecamper]

Then mount the new parts on a plug or card that you can swap out to change the x-over freq.

[merlin el mago]

Thanks for input, the pasive crossover for tweeter (MB Electronics MCD25 titanium-dome) is crossed over at 2kHz and 2nd order, for active crossover will be the same order & frecuency? the loudspeaker is Hales Two Signature with two Dynaudio 17W75EXT woofers (any recommendation for active filter frecuency & order?) & one MB Electronics MCD25 titanium-dome tweeter are mounted toward the top of the enclosure and configured in a D'Appolito arrangement.

Specifications (Stereophile)
Description: Two-way sealed-box dynamic loudspeaker with two 7" bass-midrange drivers and one 1" titanium-dome tweeter. Crossover frequency: 2kHz. Impedance: 4 ohms nominal, 2.9 ohms minimum. Frequency response: 40–26kHz ±3dB anechoic (in-room –—dB point will be lower). Sensitivity: 87dB (distance and input power not specified, but assumed to be 1W/1m).

Thanks in advance for help

[bobodioulasso]

Hales two signature!

What reasons make you want to go active?
I doubt you'll get better results than the stock setup.
As Sreten stated, it's not as simple as just plug in standard salen keys.

[merlin el mago]

The loudspeakers aren't mine, my friend who owns the Hales have one stereo power amp Thereshold 50W RMS class A & another stereo power amp Accuphase also 50-60W RMS class A as you & I know the Hales needs more power to sound good, my friend don't want other amps in class B, AB or digitals and loves the Hales sound only needs a little more of power in amps and one possibility to show my friend is go active: it's only a test so I don't need an accurate active crossover it's only to see if going active gain enough to power the Hales, if the test give results my friend will take a decision: or change the amplification or to buy a serious active crossover like BSS or similar.

[bobodioulasso]

So,
To be the closest possible to the stock set up, you need 12db/oct filters.
That is only one IC per filter.
The calculator on ESP page i pointed to will give schematic and values of R and C.
Or just buy a beringher CX 2310 (62€) but it's 24 db

[bobodioulasso]

I forgot:
keep 2000 hz as c/o frequency of course.

You'll need also to implement some baffle step compensation.
It can be done at line level.
You can find how on the same web site. E.S.P.