can someone please to check my crossover schematic

[eitanwaks]

hi,
can someone please check the schematic is correct? (it's the PDF attached)
I want a first-order crossover on the Woofer and a third order crossover on the tweeter, both at 1800 Hz. I also need to lower the sensitivity of the tweeter by 3 dB (is too hot compared to the woofer).
I reached these numbers from using Nuance to model the crossover on my computer. If you're interested, you should definitely search the forums for this solution. It is excellent.

I've used Xover Pro to design the crossover because I am not electrically proficient.

Thanks for the help,
Eitan Waks

[Inductor]

Did you use the drivers data on the xover.
If the Net black line is the summation of both they are not in phase. I personally like to see the curves for output and phase of both drivers and final summation on a simulation, to start working on it.

[gfiandy]

Hi, This appears to show an electrical response only. As mentioned in the last post really you want to work with the frequency response and impedance data for the drive unit.

A few observations on the current design.

It appears that the xrossover point is not correct there is far to much energy from the tweeter in the crosover band.

The tweeter and base driver electrical responses are not in phase through the crossover region hence they are subtracting from each other. Depending on the pysical location of the tweeter, this may or may not be a problem with the acoustic responses.

I doubt this solution will work very well.

Take a look at this web site:-

Speaker Workshop Tutorial

It gives a good description of how to use speaker workshop to design a speaker from just the manufacturers data sheets. It is quite a complex process and speaker workshop is very difficult to use but it will give you a good idea of the steps required.

Regards,
Andrew

[eitanwaks]

Andrew,
thanks for the link. I've tried the following it would seem to have problems with the baffle spreadsheet. do you have any experience with this?

in addition, I have all of the necessary equipment to directly measure my speakers. (Emu Pre and a calibrated microphone). If you know of any links that could guide me (preferably step-by-step) I would greatly appreciate it if you post them.

Thanks,
Eitan Waks

[Ling Gowa]

MW 267

[eitanwaks]

????

[gfiandy]

Hi,

This will explain what BSC is:

Baffle Step Compensation

There are also lots of other good descriptions on this site so have a look round.

The Spread sheet requires Excel with macros enabled, other than that it just worked when I sorted out where the data needed to go. So I can't really offer much help I am afraid.

Sorry I don't know a good web site on speaker measurement. Hopefully someoen else can help with that.

If you can measure the speakers I would work with the measurements when designing the crossover as you are much more likly to get a good fit that way.

Regards,
Andrew