What exactly does H+H- mean on 3 way crossover? |
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APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1173 |
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http://www.ebay.com/itm/2-PASSIVE-3-WAY-CAR-HOME-AUDIO-CROSSOVER-EMB-PROFESSIONAL-CX-10-2400W-MAX-PAIR-/231828072722 Features: Two EMB Professional 4 or 8 ohm crossovers Frequency ranges: Woofer Frequency: 20Hz-500Hz Midrange - 500HZ-4.5KHZ Tweeter - 4.5KHZ-20KHZ 600 watts RMS/1200 watts peak each 2400 Peak for Pair 600watts RMS Edited by APW - 17 March 2017 at 7:17pm |
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AJordan
Young Croc Joined: 06 July 2007 Status: Offline Points: 1013 |
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I would hazzard a guess that it actually says L M H as mentioned already. If you connect H to a midrange driver it would sound fainter as there will be less power being sent to the highs. I would connect your woofer to L........ or T as it reads. Your mid to M............or w. And your high to H. See how it sounds then.
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nicr
Registered User Joined: 17 March 2017 Status: Offline Points: 10 |
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Edited by nicr - 18 March 2017 at 2:28pm |
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nicr
Registered User Joined: 17 March 2017 Status: Offline Points: 10 |
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So my final qu is, how hot can resistors on crossovers become? Is it normal for them to be extremely hot while playing hours a day, every day for months, years or will the crossover burn out in the matter of how long? How hot is too hot? I have to decide to return them or keep them, thanks. Edited by nicr - 18 March 2017 at 4:32am |
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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Depends on the part and its spec, they could happily work at 50-60C for quite a while before failing, but it probably won't be the resistor itself that fails. It'll be the PCB burning and charring, or it might get so hit it desolders, or it might be a combo of that and vibration. And another problem is that its resistance will change as it gets hot, how much I couldn't exactly say.
But it shouldn't really get that hot, I think something is wrong somewhere. |
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madboffin
Old Croc Joined: 03 July 2009 Location: Milton Keynes Status: Offline Points: 1537 |
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Yes, the claimed power rating of that crossover board. 50 Watts max, home stereo system... |
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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Possibly a very valid point!
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nicr
Registered User Joined: 17 March 2017 Status: Offline Points: 10 |
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Edited by nicr - 18 March 2017 at 11:42pm |
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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The xovre being 4 or 8 ohm should not affect anything getting hot, it just affects where the crossover points will approximately be in combination with your drivers in the final system. Whether a 4 or 8 ohm board, the components ideally contribute zero resistance in series with a driver in its passband.
Whether 50W or 500W, if the board is getting that hot you have miswired it or it is faulty. |
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Or 500W amp driving a badly designed 50W (hifi) xover.
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Earplugs Are For Wimps!
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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It's not beyond impossible. I'm thinking along the lines of the only function a resistor should have in an xover like that would be padding, and then I'd only expect to see that on the tweeter being as it is such a simple design. Not a lot of power there in comparison to the rest. I think we can agree it is pretty cheap stuff though, be much better off going active or investing in some properly specc'd components. Buy cheap and buy twice... |
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