I'm in the process of designing a modest two-way speaker. Up until now I've only made XO's by using the verdor-provided FRD and ZMA files (or I traced graphs if needed). This time I want to measure the drivers first ("gated"), and design the XO based on my own measurements. I've been reading up on how to do this from various sources, like posts on this forum and the REW help file. I have two questions left at this point.
- Should measurements for both drivers be performed with the mic on the v-axis of the tweeter, or on the vertical axis' of each individual driver?
- Can I just use the vendor-provided ZMA file? I have a measurement mic but no DATS or similar.
If you search on line there is away of using REW to get impedance measurements and TS parameters, just needs a bit of DIY to make up the wire.
I fully recommend REW for FR and Imp measurements.
1. Yes correct, and see VituixCAD v2 manual to learn what to do with such a measurements
2. No, you definitely measure impedance of your drivers in cabinet.
1. Yes correct, and see VituixCAD v2 manual to learn what to do with such a measurements
2. No, you definitely measure impedance of your drivers in cabinet.
I've read the article about it on Audio Judgement, but he states that a combo jack (mic + line out) doesn't work for this. Unfortunately that's what I got on my laptop. I could of course buy a separate USB soundcard an fab a measurement cable, but the question remains if this is worth it for making XO design measurements...
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Thanks for the response. I'll make sure to measure the drivers' impedances also. Just to be sure about point 1: you mean both drivers should be measured from the tweeters' v-axis?
Ok, thanks. I think I'll manage.
Just ordered a USB soundcard and I'll make a measurement cable next weekend.
Just ordered a USB soundcard and I'll make a measurement cable next weekend.