Setting crossover and limiters |
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Will_H
Registered User Joined: 04 July 2018 Location: South Wales Status: Offline Points: 63 |
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Posted: 04 June 2019 at 8:30pm |
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I’m having some difficulty setting up the crossovers and limiters. I have an ultra drive pro which I’ve tinkered and played with for hours and probably worn the manual out.
I have; Pair of Cray Acoustic 18” subs (b&c 18pzb100) and A pair of EV Sx500 Any pointers on setting would be a great help. I have tried basic settings but the slope per octave etc is beyond me at the moment. I haven’t even started with limiters. Many thanks. |
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cravings
Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7441 |
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24db lr (linkwitz reilly) on all filters for starters. dunno what your subs are but try low passing them at 90 or 100 at a guess? stick a high pass of 40hz as a safety. and tops, no low pass but high pass at 100 or so too? that's a start.
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Will_H
Registered User Joined: 04 July 2018 Location: South Wales Status: Offline Points: 63 |
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Will_H
Registered User Joined: 04 July 2018 Location: South Wales Status: Offline Points: 63 |
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Thank you.
24db lr, what is that doing? This is where I get lost. I’m not too far off on the other suggested settings there though, that’s roughly what I have. Just to complicate, forgot to mention I will be bi-amping the tops.
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cravings
Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7441 |
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24db per octave is the slope, and LR is the type of filter. if you look at the display on the ultradrive and change the slope, you'll see how it affcts the filter.
don't be afraid to play with it and try different things. |
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Conanski
Old Croc Joined: 26 January 2006 Location: Ottawa, Canada Status: Offline Points: 2515 |
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With these crossovers setup you should first balance the system level wise across the 3 pass bands using the controls on the DCX.. the CD will likely have to be turned down 6dB-9db relative to the woofer. What amps are you using for each section? Depending what you have and how they are configured you may just need to set limiters to prevent the amps from hard clipping but it won't hurt to be more aggressive with the amp powering the CDs. Edited by Conanski - 05 June 2019 at 1:14am |
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citizensc
Young Croc Joined: 16 October 2015 Location: Perth,Australia Status: Offline Points: 532 |
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Someone linked this in another thread a while back, iv used it to calculate our ultradrive limiters for a couple of years, haven't killed any drivers yet so I guess it works fine.
http://www.jobst-audio.de/tools-nuetzliches/limiter Let me know if you need help with the release, or using that tool. Edited by citizensc - 05 June 2019 at 1:58am |
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djgorey
Young Croc Joined: 29 December 2007 Location: S. Wales Status: Offline Points: 1306 |
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That’s really really useful! Just one question - where it asks for speaker power handling, do you enter continuous or programme? In my head, programme makes more sense
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Will_H
Registered User Joined: 04 July 2018 Location: South Wales Status: Offline Points: 63 |
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I’m using and ep4000 bridged for the subs.
Very little info about on the cabs but they are reflex loaded and b&c driver spec.. Nominal Diameter 460 mm (18.0 in) Nominal Impedance 8 Ω Minimum Impedance 6.5 Ω Nominal Power Handling 700w Continuous Power Handling 1400w Sensitivity3 97.0 dB Frequency Range 40-2000hz Voice Coil Diameter 100m (4.0in) Winding Material Copper Former Material Glass Fibre Winding Depth 21.0mm (0.83 in) Magnetic Gap Depth 8.0mm (0.31 in) Flux Density 1.15 T Pv2600 for EV woofers (Will be) s100 t.amp for the CD’s. I do have other amps but after reading that the CD is rated at only 20w I’m afraid to use them. |
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Will_H
Registered User Joined: 04 July 2018 Location: South Wales Status: Offline Points: 63 |
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Also am I using nominal (700w) or continuous (1400w) speaker power rating?
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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B&C's 'continuous power handling' is actually the peak value, based on their own Klippel data.
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Will_H
Registered User Joined: 04 July 2018 Location: South Wales Status: Offline Points: 63 |
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Thank you, that’s good to know.
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