Show Off Your Passive Crossover
Printed From: Speakerplans.com
Category: General
Forum Name: Show Off Your Sound System
Forum Description: Show of your gear. Post pictures of your Sound System here...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=69557
Printed Date: 27 March 2026 at 7:52am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: Show Off Your Passive Crossover
Posted By: djtuffer
Subject: Show Off Your Passive Crossover
Date Posted: 04 August 2012 at 2:20pm
This is my first passive crossover I have built from scratch. I was quite pleased with it so I thought I would post a pic.
 This is the response it gives. It's measured inside so isn't super accurate.
 This is the biggest single component I have seen in a passive crossover in a pro audio cab. It's a 12mh coil from an L2 Audio TX15 sub rated at 1000w. I don't need them as I run the system active but It's an impressive size!
 Show me yours!
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Replies:
Posted By: space-face
Date Posted: 04 August 2012 at 4:00pm
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Nice work! Next time do it to NASA standards :-) http://blog.makezine.com/2012/02/28/how-to-splice-wire-to-nasa-standards/" rel="nofollow - http://blog.makezine.com/2012/02/28/how-to-splice-wire-to-nasa-standards/ |
Posted By: lost eden
Date Posted: 04 August 2012 at 5:46pm
| And don't use 3-core mains cable for speaker wire ;P |
Posted By: djtuffer
Date Posted: 04 August 2012 at 6:00pm
| What's wrong with using mains cable? It's 1.5mm stranded copper. What's wrong with that? |
Posted By: colint
Date Posted: 04 August 2012 at 6:09pm
It could possibly overheat better to strip some 2.5 or 4mm speaker cable if you have it, The other thing make sure there's not the possibility of any of the cables touching. (the bare ends of the two blue wires seem a little close) Other than that well done trying something that many people shy away from not many people even on here would attempt to build their own crossovers.  ------------- Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes! |
djtuffer wrote:Posted By: djtuffer
Date Posted: 04 August 2012 at 6:15pm
| 1.5mm is rated for 15a which is 1800 watts at 8 ohms. It should be fine in these short distances. I agree about the blue cables being a little close. Will sort that. |
Posted By: colint
Date Posted: 04 August 2012 at 6:24pm
Better to over engineer as far as I'm concerned. To be honest most of the club sound installations in the 70's-80's were done on main's cable so (seen loads of them) including twin & earth so I wouldn't think it would be a major problem. ------------- Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes! |
Posted By: boab
Date Posted: 04 August 2012 at 7:55pm
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good effort. Im sure you will see no problems with your wire just look at the capacitor leads. Here is an x-over for one of my Hi-fi cabs (12" + 8" + Bullet)  |
Posted By: ceharden
Date Posted: 04 August 2012 at 8:31pm
| 1.5mm stranded is going to be absolutely fine on a crossover board. In any case it's far thicker than a lot of the component leads! Obviously common sense needs to be applied and if you're building a high power 4 Ohm crossover for example the currents are going to be higher and you'll need thicker wire. |
Posted By: jbl_man
Date Posted: 04 August 2012 at 8:43pm
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Yes indeed,you should see some of the shonky thin wire i have seen in some supposedly good-quality hifi speakers over the years. Nice job for a first effort by the way tuffer. ------------- Be seeing you. |
Posted By: MarjanM
Date Posted: 04 August 2012 at 9:45pm
:-) ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: lukam
Date Posted: 05 August 2012 at 8:25am
 http://imageshack.us/photo/my-images/842/mx15kretnica.jpg/" rel="nofollow">  |
Posted By: slaz
Date Posted: 05 August 2012 at 8:45am
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Hope its not too much of a thread-jack .... I've seen plenty of reference designs/calculators for passive Xovers around the place, but don't think I've seen any that cater for mixed driver impedances .... (although I haven't yet scoured around that much). I'm likely to need a design for integrating a 4 ohm mid/bass driver with a small compression driver or possibly bullet (which is almost certainly gonna be 8 ohms) .... anyone have circuits/calculators for this ? TIA. ------------- REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON |
Posted By: audiomik
Date Posted: 05 August 2012 at 9:27am
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Slaz this link might be of use: http://www.colomar.com/Shavano/crossover12db.html otherwise some of the online Xover calculators ask for the impedance of each load to be entered In both instances, expect to have to do some 'tweaking' of values for best results Mik ------------- Warning! May contain Nuts plus springs, washers, screws, etc, etc. |
Posted By: slaz
Date Posted: 05 August 2012 at 9:47am
Thanks Mik .... will have a proper gander later .... ------------- REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON |
Posted By: djtuffer
Date Posted: 05 August 2012 at 12:14pm
| I have found that these crossover calculators don't realy work. You have to spend a lot of money on pro stuff like LEAP before you can get simulations that get close to reality. Trial and error is the best way in my opinion. |
Posted By: ceharden
Date Posted: 05 August 2012 at 12:42pm
| The majority of crossover calculators will only give 'ideal' values, assuming flat frequency and impedance responses for the drivers etc. You can use them as a starting point providing you take the other factors into account. |