Setting limiters on Berry LMS |
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jonminns
Old Croc Joined: 13 April 2008 Location: United Kingdom Status: Offline Points: 1877 |
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The attenuator on the outputs is an excellent idea, its one i have put into practice and works spot on
Means you can drive the dsp harder, have more control, more sampling, and more lights :P Jon |
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drivebycar
Registered User Joined: 28 April 2008 Location: United Kingdom Status: Offline Points: 440 |
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Set them all up yesterday, so looking forward to testing it out at the weekend. Just one more question, on the attack & release, what is an average value for these?
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Saul
Old Croc Joined: 15 June 2007 Status: Offline Points: 5912 |
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does anyone know the input sensitivities for UKP1300 and UKP2100
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cuivenion
Young Croc Joined: 30 January 2005 Location: United Kingdom Status: Offline Points: 971 |
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So, just to confirm I'm doing this correctly, If i want to use the limiters on the dcx correctly I should set for the fastest attack, longest release and the highest ratio to protect the speakers?
Here's my system: QSC PLX3402 running 1 HZ500 (500 wrms) per channel JBL MPX1200 running 1 Dare E18DR (Fane 18XB 4ohm) per channel The PLX input sensitivity is 1.7 volts at 4ohms so I've increased the output on the dcx on these channels by 6.9db and set the limiters to -16.6db. I've estimated the MPX's sensitivity at 4ohms to 0.775 volts, so I have left the the output on the dcx on these channels at 0DB and set the limiter to -23db. The system sounds fine when playing music as i don't push it anywhere near the limit. I use it for live sound too though, and thats a different story. I just want to check I'm protecting the speakers properly, and in the right way.
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help!!!!!!!!!!
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levyte357
The 10,000 Points Club Joined: 10 May 2004 Location: UK, London Status: Offline Points: 11743 |
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Unfortunately, the Proline 2700 is a bit rubbish @ 8 ohm stereo, and when I had mine, I only ever used it in 4ohm stereo or 4ohm bridge, due to the lack of power in 8ohm stereo.
So allowing a max signal of 0db to arrive at the Proline, in 8 ohm stereo will result in dissappointment. However someone on here has said, the protection on 2700 is not very good, and clip light on amp may mean driver life just shortened. When using the DCX limiting on kick/mid tops, I typically set limiters to -19. I usually have powerful amps in this range, so setting those to 0db sensitivity and 75% gain travel always works with this, and nothing blown. I dont use DCX limiters on sub. I use external MDX4600 XL.
[hijack] Cuivenon, please compare the MPX and PLX in 4ohm bridge on sub sometime, and let me know results. You maybe pleasantly suprised. [/hijack] Edited by levyte357 - 22 June 2009 at 11:10am |
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cuivenion
Young Croc Joined: 30 January 2005 Location: United Kingdom Status: Offline Points: 971 |
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[/QUOTE]
[hijack] Cuivenon, please compare the MPX and PLX in 4ohm bridge on sub sometime, and let me know results. You maybe pleasantly suprised. [/hijack] [/QUOTE] Won't be doing that anytime soon mate, not when I'm running 4ohm speakers! What's meant by [/hijack]?
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help!!!!!!!!!!
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super-hero
Old Croc Joined: 29 March 2005 Location: Middlesex Status: Offline Points: 2094 |
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Great thred this, as many people would like to know how to set their limiters properly, myself included.
So here is my scenario.
My amp sensitivity is 1.07v rms @4r and delivers 1100watts.
If I want to run a speaker that is only rated at 150watts @4r
should I set the limiters 8.65dB lower, or, reduce the input gain on the dcx by 8.65dB. and if I reduce the input gain, how does that affect my limiter settings?
Or should I reduce my input gain by 8.65dB and lower my limiters by 8.65dB.
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doober
Young Croc Joined: 03 January 2006 Location: Cornwall UK Status: Offline Points: 1118 |
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The limiter stops the output exceeding a given level. The input gain affects how much input is required to hit the limiter, but not the level you're limiting to.
I would set the limiter 8.65dB lower (assuming this is the correct attenuation to limit the amp to 150w, I've not checked your maths), and then lower the output gain on that channel until the balance between bands sounds right. The input gain level is a matter of personal preference, you can set this high and the outputs low or vice versa. I try to keep both as near 0dB as possible, although the output gains will usually vary with each frequency band due to different power levels and efficiency of drivers. The hf will almost certainly be a lot lower than the rest. Hope that makes sense Kieran |
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Blahblahblah
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phildat
Young Croc Joined: 29 January 2009 Location: manchester Status: Offline Points: 1115 |
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bumped this for later reference.
Edited by phildat - 14 June 2010 at 7:44pm |
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phildat
Young Croc Joined: 29 January 2009 Location: manchester Status: Offline Points: 1115 |
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anybody know where the link to this maths stuff is??
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jack-red-eye
Registered User Joined: 02 June 2010 Location: Manchester Status: Offline Points: 258 |
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its not on the cerwin vega website and i cant find anything for the ukp on the tiniterweb??
Is there a way to calculate it? Edited by jack-red-eye - 17 January 2011 at 5:48pm |
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Adam_Iron_Horse
Old Croc Joined: 02 January 2010 Location: Scotland Status: Offline Points: 2043 |
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Hey really useful thread but I've not really got my ultradrive set up right.
I just slapped on -22db limiters on all the channels as I was in a rush when I first got it and set it up for the first gig. My amps are Peavey cs1200x - 1800W bridged into 4ohms driving 2 Pd. 186 (700W RMS each)sensitivity 1.4V C-audio SR707 - 825W a side into 4ohm driving 2 eminence deltas a side (400W RMS each) but couldn't find the sensitivity of the amp. Soundlab G097M (I know) - 400W a side into 8ohm driving one unbranded 2" compression drivers a side (120W RMS each) input sensitivity of 1V can anyone help me? well i know someone on here could but could someone help me? :) |
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