2 Way Passive Tops VS 3 Way Passive |
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Five &
Registered User Joined: 22 May 2008 Location: Caribbean Status: Offline Points: 142 |
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Posted: 25 April 2016 at 10:39pm |
Hi All I Have A 2 Way Passive Top Which Has A 12"
Woofer And A 2" Exit Horn |
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Conanski
Old Croc Joined: 26 January 2006 Location: Ottawa, Canada Status: Offline Points: 2515 |
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No, add a second 12 and then biamp the cab with the 2" CD crossed at 1khz and you will have 6dB more output and much better SQ.. assuming the horn will support a crossover that low.
Edited by Conanski - 25 April 2016 at 11:29pm |
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Five &
Registered User Joined: 22 May 2008 Location: Caribbean Status: Offline Points: 142 |
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Thanks for your reply the only problem is I don't which to go biamp
As amp channels are limited in my small setup currently am using one 10000q to run 4 bottoms and 4 passive tops. |
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Conanski
Old Croc Joined: 26 January 2006 Location: Ottawa, Canada Status: Offline Points: 2515 |
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Well you got to pay to play, adding a 6" mid will just displace some output from the 12s with no net SPL gain, if you don't add more drivers and biamp then you need to trade up to some other passive boxes with more output.
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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An off the shelf passive crossover is almost never right for the drivers people pair it with. Adding a third will likely only cause further issues in terms of time and response unless you build a custom crossover for it.
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Five &
Registered User Joined: 22 May 2008 Location: Caribbean Status: Offline Points: 142 |
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Thanks For All Your Input So Biamp Is The Way To Go For More Output Replacing My 2 Way Passive Crossover With A 3 Way Crossover And Adding A 6"Mids Is Only Dividing The Output To Each Driver. |
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matty w
Young Croc Joined: 27 August 2008 Status: Offline Points: 798 |
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All this advice could be wrong !!
What drivers are you actually using ? |
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Black to black , red to red , blue to bits ....
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matty w
Young Croc Joined: 27 August 2008 Status: Offline Points: 798 |
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Also , how big is the box in litres ?
What crossover frequency and slope does your passive crossover employ? And what horn are you using for the compression driver ? Edited by matty w - 27 April 2016 at 7:45am |
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Black to black , red to red , blue to bits ....
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Five &
Registered User Joined: 22 May 2008 Location: Caribbean Status: Offline Points: 142 |
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Box Size H 25" W 16" D 15"
Crossover Peavey ECS-1800X 1800 Hz 12 dB/octave crossover frequency Horns are B&C DE750TN-8 2" Titanium Horn Driver 8 Ohm |
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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you have a few issues to consider with those drivers. the 12" mids will start to beam at around 1.2kHz so you don't really want a crossover point as high as 1.8kHz. there are a number of impedance peaks in the B&C driver response so you would need to notch filter these if using a passive crossover. there is a big peak at about 16kHz which probably indicates diaphragm break-up. u may be better off with a 1.4" driver.
the peavey crossovers include some HF boost so they should be used with constant directivity (conical) horns. I'm sceptical whether a pre-made crossover can be used with any old drivers and I think the peavey recommendation to use a 1.8kHz crossover with a 12" or 15" driver is wrong.
it's very difficult to cover the full-range with two drivers - you have to decide which compromises are least offensive to you. |
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sounds4u
Registered User Joined: 17 November 2011 Status: Offline Points: 72 |
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Hi Snowflake , what would be the ideal setup for you in a mid high cab assumingly having a 18"reflex cab below? Mike
Edited by sounds4u - 29 April 2016 at 1:31pm |
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Five &
Registered User Joined: 22 May 2008 Location: Caribbean Status: Offline Points: 142 |
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Thanks Much.
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