Crossover Design Software Xsim Tutorial for HiFi Speakers 

Ed DaPimp It's a huge subject but will be coming with time as I grow the channel. In a month or so Ill have a video walking you through a complete design/build. I'll be starting next after I'm done with a speaker meet this weekend. The more videos I'm able to do the more those tutorials will come. It's just such a huge subject to cover in one video. In the meantime feel free to ask any specific questions. Thanks for the support :)

Bill Waslo No problem. Its pretty basic and hope to discuss specific features and ways of use eventually. If you ever want to provide input about what FAQs you get, you know how to contact me. Funny thing, I was still using the beta version I tested up until it was time to do this video. I discovered a few things when I downloaded the latest version. Glad I did that. Figured it was prudent to get the latest.

At this point you may know about it more than I do! Haven't used it since last year, though plan to soon. Maybe you could do a section on getting "classical" filter shapes (since so many new designers seem fixated on creating some Nth order Somethingworth responses (for no good reason I can think of nowadays, since measurement setups are so available, but it's probably the comment/question I hear most)

Vic G I do have a Vifa midrange tested and reviewed you can watch, but nothing HiVi yet. This channel is just starting so possibly hivi in the future. Watch for a test and review of the Vifa XT25 tweeter. No Vifa woofers though. I do have some cheap Peerless woofers here but they are 5.25" and wouldnt make sense in a 3 way.

They’re pretty darn accurate, but yes, an error in the driver follows that speaker. The more inaccuracies in a driver the more error. And of course your do need to listen and evaluate the design and tweak. The computer definitely can’t do that.

didierleclerc66 I measure in the box for XO design. Better results that way. Ya I’ve improved but still not a “pro” RU-vidr. Not really trying to be either. Just doing it to help.

100% correct. Getting clean data is difficult.

The Sound Guy yes please share it with anyone.

Quake Audio this is a pretty big topic you’re asking about. There are exceptions but yes you want the phase to be on top of one another. Then the drivers will be in phase and offer the most tweeter protection and woofer breakup suppression as possible, and some other stuff. The phase really only needs to overlap across the XO region. It’ll be impossible to get them to overlap for the entire frequency spectrum.

If you go to one of my driver test videos, I have a drop box link in the description.

jpc6204 it’s easiest to measure both drivers individually and also wired in parallel, without moving the mic. Then in Xsim add the graph of them wired in parallel as an overlay. Then adjust delay until the response aligns with the parallel measurement. This will give you the proper delay. It’s fairly important to do right to get good results, but if in doubt about 25mm usually works.

@@ImpulseAudioSpeakers Got it, thanks! I also saw another video you had entitled "Life S5 | Part 3: Design Goals and Setup," which walked me through the process. You're gonna make me a master speaker builder in the coming months!

They can work very well but are a pain to design. Parallel cross overs let the design mash the driver into submission without affecting the other driver. It’s a real trick getting series to work. But they certainly work just fine. I’m not sure there’s actually a sound quality benefit, but if it works for you go for it.

Jim Conard hi Jim. Thanks for the feedback. As mentioned at the start of the video, this wasn’t a tutorial for beginners. A certain level of knowledge is required for this to be helpful. Sorry. I hope to get more starter videos up on my channel over time.

@@ImpulseAudioSpeakers First off, it was not meant as a complaint on your video. If you thought so I apologies! You are doing very good crossover videos! I didn't explain myself very well. My though for you was to make a very basic video explaining every move in order so people could go back and see where they went wrong. That would grow your number of viewer. This is just my thoughts. Thanks again for help!

Jim Conard no problem. I didn’t mind your comment. I appreciate all feedback. That does clarify what you meant though. It’s a good idea. I’d like to do a video that makes the process as simple as possible, beginning to end. I need to find the time to do it though.

Ed Incleve hmm, I’m not aware of that sort of software. Would be really tricky without the files. A lot depends on the frequency response where the XO point is. Sorry.

If you measure with the drivers in the box, like I do in my other vids, then the box effects will be taken into account.

I’ve been hearing circuit blocks are no longer a feature in Xsim for some reason. I didn’t have to download anything special.

Maz 4bz I did. I might not have shown that in this video because it was about how to use the software, but I usually do. Note that method is not always necessary.

Dave Jones yes it will. You will change the impedance and the sensitivity. It would require reworking the XO to sound ok.

It uses the measurements you provide. So if you measure in the baffle/enclosure you’ll capture the baffle step loss. I think it does have a baffle simulation feature but not too familiar with it.

@@ImpulseAudioSpeakers Cheers thanks, will be keen to give this a go

Fred Kleytman you are right that actual driver files will make a big difference. Unfortunately I don’t know where you could get the files for that driver. I doubt many people have measured them. Unlikely you’ll find them.

I’ve never found that to be a problem. It’s usually always listed. Perhaps labelled resistance or DCR?

@@ImpulseAudioSpeakers I was able to determine that 350m[R] is 350 milliohm which converts to 0.35 ohm. Thank you!

It does matter because if it’s after the capacitor must be smaller for the same affect. Either can work just find though. Sometimes I put a resistor before AND after the cap to get the outcome I want.

There's a lot of information to pack into one video to get from start to finish, but I will keep adding videos about how to measure and get information for XO design. Is there something specific that you're struggling with understanding?

since I played your video a bout 100 times, I got to the point choosing components. And I got .frd and .zma files off from partsexpress. Now I am going crazy putting on the graph to get flat response. Can you help me with the graph? I will pay for your service. My email thagek@gmail.com

What part are you struggling with? I'd rather help you get to a solution and learn than get paid to do it for you. But I don't mind making some suggestions either.

Thank you for your kind heart. I am struggling on first crossover point between tweeter (I picked dayton tweeter from partexpress) and RS-180-8 mid driver. I just can't make that crosspoint work.

Allen Aung ok I'll email you or you can email me at ryan at impulseaudio dot ca. I'll need you to email me the files you have and your xsim file too.

bsl bl there’s nothing in particular you need to do. Just design the crossover to tip the woofer down in such a way as to eliminate the baffle step.

lol lol that means both the tweeter and the bass are playing in phase together so both outputs are creating more output at the XO point than the rest of the system. There will be a peak in the response that may or may not sound good. Probably best to adjust the XO a bit to flatten that peak down a bit. Depends how big it is though.

W엉덩 I use the mod delay if I want to change the physical location of a driver or to set the Z difference between two drivers. Not much else for it.

klazzera Impedance definitely requires considerations, but if you're using a modern solid state amp you don't need to get too fussy. The higher the impedance the easier the load on the amp. 3 ohms isn't to bad, but its a tad low. And the curve doesn't need to be flat. John Atkins of Stereophile comments on impedance in the measurements section of that magazine and can be helpful to read the types of things he finds on different commercial speakers.

thanks for your quick reply! so let's say my amplifier is rated at 60 watts at 8 ohm, does that mean any impedance value above 8 ohms mean that my amplifier power output is less than 60 watts at those regions so i should compensate with using a higher wattage amplifier for those impedance peak regions? I'll also have a look at the magazine you mentioned

klazzera yes the output will be less than 60 watts but thats not a bad thing and it definitely doesn't need to be compensated for. It just means the speaker is more efficient at those spots and the amplifier doesn't have to output as much. It's the low impedance spots that can give your amp troubles. Think of the high impedance like a benefit.

oh okay i get it, further tweaking on the frequency response i realized there are some 0.5ohm impedance dip points have appeared, i guess i'll need to fix those first. I guess i should keep the whole impedance curve above 3-4ohms. thank you so much for your help!

IowAudio Review do they let you import actual measurements of the drivers? Or just use theoretical lines?

W엉덩 I don’t understand the question. Maybe I haven’t had this issue before.

@@ImpulseAudioSpeakers Please let me know your e - mail address.

Rohail Butt hey glad you saved your money. Tricky situation though as you would need to measure the drivers. If you could find a spec sheet you could at least get some data files based on that.

Thankyou for your response! Well I contacted PSB and got a reply, they are not helping me either. So basically i've wasted my money and nothing will come good of it?

Rohail Butt they won't tell you what the original schematic was? Can they at least sell you new XOers? What is the damage? I wonder if they can be repaired...

Damage is that they've been thrown away :( they don't have the xovers anymore so cannot be sold. I asked.

Rohail Butt ouch. Hmm, if you can't get your money back the best thing may be to use a generic crossover temporarily and use the speaker to learn. Or maybe reuse the cabinets to start a new project that has been proven properly.

Max B. Simonsen I think the minidsp umik is pretty cheap at around $100, and is perfect for the job. But if that’s pushing the budget try google Panasonic WM61 capsule. I might not have that quite right, but it’s a DIY mic you can build for about $5. Not bad either. You’ll want to upgrade in the future but worth using it to learn.

Yup that’s fine. It’ll have some humps in it.

@@ImpulseAudioSpeakers Thank you! :)

bsl bl a series botch is a weird name because it’s an inductor, capacitor, and resistor all in parallel, but that set of components is in series with the driver. A shunt (or parallel) notch is the opposite. In parallel with the driver but the parts are all in series. The series notch would be best for a 15khz peak but shunt could potentially work there. Shunt notches can really lower impedance if you’re aggressive and in the driver’s bandwidth. Dips are really hard to fill passively and depends on where and how. Possible to fill it by using the tweeter padding and filter. Certain things can work. Dips are less of a problem than peaks, and some dips shouldn’t be filled. Such as those caused by diffraction.

Thanks Ryan. I guess the name series notch is because the notch is in series with the driver and the shunt notch is so called because it is in parallel to the driver. So, I notice that to get the peak down, I need to go to about 60 to 70 ohm resistor value in the series notch. Is that something normal?

bsl bl no that’s not normal. Have you adjusted the inductor and cap to try and widen out the Q factor? 7 dB at 15khz is somewhat odd. What driver is this and how was it measured? If the data is good I would keep working at it and see what you can do with it.

@@ImpulseAudioSpeakers .... The driver is the Dayton ND25TA-4. I am using it with the ND90-8.

It’s just a convenient way of turning off the component. For instance, you could have a 3rd order crossover L, C, L and then short the 3rd leg, L, to see what a 2nd order crossover does. You could also short a resistor that you don’t want but might want later. That sort of thing.

Martin Ahven the only one I'm aware of is SPL trace but I think that's probably the one you're thinking of. If it's not available anymore I'm not sure what to say. I know another channel called 123Toid has done a video about it, so you could check there. You can also manually do it but that would take forever.

So I have been informed that fprawn's FPTrace is the new program to use. It's apparently quite good, though I haven't tried it. Hopefully that helps.

@Martin Ahven: I tried FPGraphTracer but it sometimes recognises the wrong lines depending on where you click. You might have to compile one file from parts of several files. If you use Visaton drivers you should definitely play around with BoxSim. If you speak German watch the BoxSim tutorial by "Leo Lautsprecher". It's really good! Maybe also watch my tutorial about crossover design where I used BoxSim but don't explain much: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5Kvl0iBQ0L0.html.

I’m not sure what is happening for you. It should be along the top menu, but I’ve never had that problem. To be honest, I don’t use circuit blocks very often, even though they are useful. So maybe I am missing it too.

@@ImpulseAudioSpeakers I have figured out what had happened. When I finished working on a project last night I have decided to save it using "Save As" option. The program offered to save the file in the "CircuitBlocks" folder. But I instead have chosen my own folder elsewhere. After that, every time I tried to use that "CircuitBlocks" button on the top menu the program would offer me to load blocks from that same folder where I saved my project. However, that folder has no any crossover blocks in it. Then I have tried to find that folder named "CircuitBlocks" on my computer but the Basic Windows 7 could not get it. So, this morning I have asked a friend of mine and fellow speaker builder to install this program on his machine. He then opened the "CircuitBlocks" option window and told me the path to that folder on a hard drive. That was my question, Ryan (the location of the folder). Now, that's where it can be found: \\[Name of your computer]\Users\Public\XSim\CircuitBlocks

You can do this easily with eq or moving the speakers around in the room. Basically impossible using passive crossover components. The room is likely causing a boom sound at 70hz more than the cabinet.

@@ImpulseAudioSpeakers That's what I did... adjusting the volume, or the pots of my preamplifier, and it did something to a degree, but still... at a distance of about 1.5 meters or so, that booming sound was so loud, that I had to cover my ears... So you say that its the room... I could be... the cabinets are 1100/220/300 (H/W/D in millimeters), and my poor room has 3.5 by 3.5 meters, and it's not soundproof! In a way I am glad that is the room! :) Thank you very much! 🙏

It IS the room! Unbelievable!!! In fact, my speakers sound AMAZING! 🙂

Greg Olsen I’m not too sure. Someone else recently asked about this. It seems the developer has pulled it maybe?

analogaudio rules it doesn’t get updated very often but did receive an update about 2 years ago. It was pretty big too.

Of course he won’t, don’t hold your breath.

Brian Oglow I’m not sure. I heard of a pay program a while back but not sure it’s still available. Fuzz measure I think it was called.

toad cut I’m not sure. I’ve never used their files. There should be 2 files for each driver. 1 frd and 1 zma file each. So 4 total kind of makes sense.

It should be in the description of the video.

Two woofers in series produce the same SPL as one, despite being 3db more efficient. That’s probably why your line didn’t change. If you need it louder, try parallel. But then the impedance will drop in half, so be careful.

@@ImpulseAudioSpeakers I ran 2 4 ohm in series for 8 ohms if I run parallel it will be be 2 ohms and I don't think I should try that with my amp.

@@BostonMike68 ya you won’t want to do that. You’ll have to go series. At least your amp will like that instead. Lots of headroom too.

A decent calibrated condenser mic and a decent space to work. The software I recommend is REW and Xsim. I suppose you’ll also need a way to measure impedance. The DATS system is about the only choice for that.

@@ImpulseAudioSpeakers How much does all of that stuff cost? I'm on a VERY limited budget!

@@JoeJ-8282 if on a budget, get the mini dsp mic or some other cheap mic for about $150. Then the DATS would be another $100 I’m guessing. Sorry I haven’t priced this stuff out in quite a while. If you are doing an active XO you don’t need the DATS.

@@ImpulseAudioSpeakers Wow, OK. More than I was hoping, but I guess I need to save up for a while if I ever TRULY want to Improve my game with speakers! I guess I ALSO need to get an actual computer first too though, because rn all I can afford is my cellphone that I watched this video on. And really I only have that, mainly because I need it to stay in touch with and use during work, i.e. my job. So far all I've ever done is basically do stuff with and try to improve speakers that I find for free in trash or recycle dumpsters, or sometimes I buy from my local thrift stores IF they are no more than $1/inch of driver diameter. That's my limit. AND they have to already sound pretty good before I buy them, and then I will take them home and tinker around with them and improve them the best I can by ear, and by using my basic knowledge of how crossovers work and such, along with all of the other more "subtle" things I've learned over the years that make speakers sound better. I only have a basic multimeter and a calculator to work with rn, and even though I DO have a really good ear for what sounds good and what doesn't, after literally 1000's of hours of experience in A/B comparison listening and experimentation, when I watch the REAL speaker building channels like this one, (and many others too), it just makes me realize that I really don't know much of anything substantial about speaker building in all actuality, even after all these MANY years of experimenting with NO budget, second hand speakers. I do what I can with what I have though, and it's at least fun and enjoyable and entertaining for me, even if it has to only be a casual hobby, because of time and budget... I love videos like this one though that show how awesome and cool and relatively EASY speaker designing and building CAN AND SHOULD really be, plus it gives me something to look forward to, if ever one day I can get enough money to actually buy me some REAL analyzer equipment and stuff like that! It's really amazing what all is possible nowadays with this type of stuff! Technology sure has come a LONG way since I was a kid and I started to be interested in this kind of stuff!

@@JoeJ-8282 you should check out the Panasonic condenser mic. It’s a mic capsule that costs about $2 and you can diy a mic with it. Pretty darn accurate. Can even diy an impedance jig if you want. They’re not great and not as accurate as the mic and jig I mentioned, but will really up your game for about $10.

maped345 a lot of people have recommended it, but I haven’t found an advantage. I like software that is simple and to the point. Which is part of why HolmImpulse is actually my favourite measurement software even though it’s not popular. Xsim has a lot of power built into it, but the core of it is very straightforward.

ozy prima sorry about the speed. As you do more and more work with Xsim it will become clearer.

Impulse Audio how to read impendance correctly in curve ? Is the best as flat as or how should it be ?

ozy prima doesn’t need to be flat. There isn’t really much need to focus on the impedance curve other than to make sure impedance doesn’t go too low and cause problems for your amplifier.

@@ImpulseAudioSpeakers its means just keep focus on phase and freq response ?

ozy prima well yes but do make sure impedance doesn’t go below say 2ohms. At least. 4 ohms is better.

That level of power is only going to be at very short bursts. Milliseconds. Also, I usually put a couple of resistors in parallel, essentially doubling the power handling. I’ve personally never had a resistor burn up, but if it happened they’re easy to replace.

andythewooferguy I dont have any Beyma drivers to be honest. I have Eminence and Celestion from the PA world that I will eventually review and post the measurements. But nothing Beyma. Is there a specific model driver you are interested in? I could see about eventually getting one or two of them to try if I have a need.

Impulse Audio 15G40, 8G40 and the CP21/F. Do your make these profiles yourself?

andythewooferguy Yes. If you look at my other videos I have 3 or 4 driver reviews. Just getting started. There will be many more. Next is the Motus UH205PW1 and then the Denovo Magnum 12. Ill look up those Beyma drivers and see if I can find a use for any of them.

Honestly, you have to measure the drivers like you see me do in some of my videos. You could also look for them for other drivers, but be sure the baffle size is the same. Most drivers are tested on a very large baffle which we don’t use in our homes.

Cary Phillips you would either need to measure them, which is another entire subject on how to do that, or somehow get the files from another source. There is a program called SPL trace that creates frd and zma files from the manufacturers spec sheet. What sb and vifa drivers do you have? I will be measuring the sb13pfc25-04 next and also the vifa XT25SC90-04. I may also have others.

Thanks for your reply, 1 ; I am building a 3 way with the SB acoustics SB29RDC-C000-4 Tweeter, the SB 12NMRX25-4 Midrange and the SB23NRXS45-8 Woofer. 2 ; I Am also going to design and build a switchable Super tweeter using the VIFA XT25SC90-04 with 3 crossover points and 3 sensitivity points for system matching to various speaker systems. I thought this software would be very useful. Regards Cary

Cary Phillips of those I only have the Vifa XT25SC90-04 and will be testing it next in fact. I currently have it in a box ready to go. It's going in my latest video and should have test results within a week. You'll be able to download the files and try them in xsim to see what could potentially work for you.

I do have the SB29RDCN-0004 but it is slightly different being the neo version. Could get a test of those though, if it would be helpful. It would have to wait though.

Sorry I don’t. I think the developer of the program may have abandoned the software.

bhai bhai well that’s quite a different animal. I’ve done a few. Not sure I can fit that in the near future but if the need comes up I certainly can.

I think you’ll need to learn from many sources. My videos are a bit technical and advanced, but they might help give you some ideas. There are some good forums to read, such as the parts express tech talk. Use google too. Videos aren’t a great format to learn speaker design. Unfortunately text might be easier.

You need to use measurement software such as Room EQ Wizard or HolmImpulse. You can also change a .txt file into a .frd but the txt needs to be in an frd or zma format.

@@ImpulseAudioSpeakers Thank you, I know that. I use LoudSpeaker LAB 3 for measurements, but unfortunately it cannot export frd or zma, which is why I ask which one are you using.

@@home_lab does it export txt files? Could convert those.

@@ImpulseAudioSpeakers the software I use cannot do this. Do you know how this can be done, with which program?

@@home_lab all the measurement programs I’ve used can do it through the export options. But I’ve never used your software. Sorry.

i raul Yup. Just add more drivers to the schematic area. This was just a two way to get people going.

Great info. Maybe for the newbie if u have time u could do a short video to explain what is the attribute in a crossover of a capacitor, inductor, resistance. For example: u use a inductor on a tweeter.. if u want lower the impedance or frequency. Or u use an extra coil on the midbass to cut the upper frequency and a capacitor to do something... :D(i have no clue what i'm saying but u understand the idea) ps: subbed :D

i raul Actually that is something I would like to do one day. Hopefully I'll get the chance soon.

ziggy8757 If you go to the a driver review video of mine, there is a link in the description. So far only 3 drivers available but you can play with a possible 3 way. More are coming. I show it very briefly at the beggining of this video going to the drop box link. Let me know if you have troubles.

Yes I’ve gotten better at that in my later videos. Thanks.

Joseph Anselmo you are correct. Those things are junk. And I actually did make a video sort of about it. It's called something like "why to NOT use online crossover calculators". Those prebuilt crossovers are based on perfect flat 8ohm loads without any deviation from flat and assume phase is perfect. They never work.

What that hell! I had that little bit that those things are junk.

Yes no problem.

That is just the resistance of the inductor. Usually about 0.3ohm for a small inductor and 0.5 for a medium to large inductor. Some are up to 1.0ohm if they’re big air core and small gauge. Usually labelled on the inductor or you can just put a multimeter on it and measure the resistance. It’s not a critical item to get right most of the time.

Nosajjao if the sensitivity of the tweeter is much higher than the woofer (which is common) then the input to the tweeter needs to be restricted using resistors. It also helps protect fragile tweeters. Big amps are mostly for the woofers.

I have a drop box account for all my driver tests. The link is in the description of each driver test video.

@@ImpulseAudioSpeakers I think I worded that wrong I'll get back to it. Good video.

Sorry I’m not sure. I haven’t ever used bass box.

@@ImpulseAudioSpeakers how about DAT V3. From Dayton audio

@@minravex9919 you mean how to get the data out of DATS? I assume there’s a download function or something. Save the file as a zma file.

@@ImpulseAudioSpeakers OK let me try

@@ImpulseAudioSpeakersit didn't work.... No option for zma file type

It’s been a while since it was developed. Maybe it’s not offered anymore. That would be a shame. Or try the non-secure link. It’s just a buddies website. He won’t hack you if it’s his.

@@ImpulseAudioSpeakers I managed to download it thx, was looking for your video on how to download drivers, I need one for a seas excel woofer and tweeter.

I’m not sure to be honest. Mine has always been that way.

@@ImpulseAudioSpeakers silly me, its because i didnt ground the amp

Same as passive. Really no different other than you don’t need the impedance tests.

Zox Wolf it needs three columns. Frequency amplitude and phase. You can even just add 0 for phase on the whole thing. But you’ll need to extract minimum phase in that case. I show how to extract minimum phase in my Life S5 series, about part 4 or 5.

@@ImpulseAudioSpeakers Thanx mate, I manage to make frd and zma file but as you said phase is 0. I will check your other videos. How much accurate is this? I noticed that i need to adjust scaling (vertical center and vertical value) on right windows othervise i cant see my frequency and impedance curves. I traced original dynaudio graphs in corel and than in FPG tracer. I am planing to get DaytonAudio OmniMic V2 with software. Do you think it will export FRD and ZMA files as it should.I am still confused bout using this Xsim :( Cheers mate

Zox Wolf without phase it’s not accurate. But you can extract minimum phase which is accurate to a point. Difficult to explain. Omnimic or any mic like that will give you the frd files. Zma files are different and require an impedance tester. All this can be quite confusing. I keep planning to make a video showing the process from beginning to end but it’ll be quite a bit of work.

@@ImpulseAudioSpeakers Thanx for your explanation. I intend to get DATS V and OmniMic V2 from Dayton Audio :) I will closely monitor your channel for tutorials .. Cheers mate

Do you mean the TS parameters? Because you don’t enter those for crossover design. That’s for box design.

@@ImpulseAudioSpeakers thank you for your answer, I would at least like to enter the necessary parameters like impedance ..

@@mikreference3a130 you need to edit the driver and add zma or frd files.

Yes you do need the measurement files. Without those it will be frustrating.

@@ImpulseAudioSpeakers thank you sir. Here in the philippines they are not incline to use dividing network. We rely to ready made dividing network from online seller.

Vladimir P sorry I’m not sure I understand the question. Are you asking where the drivers go on the screen? They go on the component layout window. It’s supposed to look like a circuit board.

@@ImpulseAudioSpeakers I meant the location of the drivers on baffle. For example, if I position the tweeter 60 mm to the left or higher or lower. How does XSim understand what driver placement I made in my project?

Vladimir P you should see my follow up video that shows the baffle functions of Xsim. But you really don’t need it. Always keep the tweeter as close to the mid or woofer as possible.

Oh man I don’t know anymore. I assume a google search would find it. Bill Waslo was the creator so maybe his site.

@@ImpulseAudioSpeakers Thanks, I've found the link on diyAudio 😀

If I’m understanding your question correctly, yes phase should align at and through the crossover region. It doesn’t actually have to, but I believe it’s the best way to design it as you get the most tweeter protection and stuff.

@@ImpulseAudioSpeakers ah, yeah that makes sense. Was just unsure if I'd just been going above and beyond to what wasn't needed but I just forcive habit. I also try to make impedance phase as flat as I can as well, although probably really not needed, certainly isn't something I hear anyone really chasing. I'm of a good understanding of impedance, but impedance phase in speakers is a job to find an explanation of how it's beneficial.🤔 Any ideas on that one? Is it something you have ever tried for any reason?

@@zefrog7482 I really don’t concern myself with impedance other than ensuring it doesn’t go too low. Especially at low frequencies for a wide band of frequencies. If it goes down to 2ohm at 8khz, or something like that, I don’t get too concerned. 3ohm from 60 to 200 hz is a problem for some amps.

Kempo that’s a pretty big topic. It’s the driver resistance at all frequencies. It means a few different things. Efficiency is a big part of it.

@@ImpulseAudioSpeakers hey thanks for such a quick reply I have studied this video many times over, is it ok if I send u an email to ask a few questions? is there a community address? Thanks!

Kempo I’m pretty slow and replying and have had to step away from speaker stuff for the next 6 months while we go through and extensive addition. But I can be reached at ryan@impulseaudio.ca

@@ImpulseAudioSpeakers thanks and that's cool I understand. I'm going to send out something quick before I go to sleep, late here in UK

Edward Case you could trace them. A lot of work and not that accurate, but can work. Ever considered buying a mic and measuring? Also a lot of work but it’s the ultimate way of doing the crossover design.

@@ImpulseAudioSpeakers Hi, can you do a video on measuring the drivers at home? Step by step (idelaly on free software:-) I can't find a video showing how to get a frd and impedance file by measuring yourself. In your other videos you measure drivers but you basically show the final curve but not how you set-up the program and which steps you did to get the curve (and the file to export). Pardon me if I missed it somewhere. Thanks

Petr Horky this is basically what my next video will be. I’ve just been extremely busy, but should have some free time soon.

@@ImpulseAudioSpeakers Well that's just what i wanted to hear! Thanks very much, will be waiting for it.

Hi, have you ever had the time/chance to make that video about measuring drivers at home from start to finish? Still difficult to find a simple overview of the process. There is lots of info around, but nothing step by step measurement of drivers. Thanks

H LW no, there’s two poles there. But you can adjust however you like in Xsim.

@@ImpulseAudioSpeakers I was overlooking the driver itself! Cheers :)