NEED HELP WITH MY CROWN IT 6000,8000 PEAK VOLTAGE LIMITER SETTINGS,AND XOVER,CROWN ITECH PEAK VOLTAGE CROSSOVER
Posted 13 November 2012 - 10:25 PM
jbl srx715 800 watts continous/1600 program/3200 peak
jbl srx725 1200 cont./2400 pro./4800 peak
jbl srx728s 1600 cont./3200 pro./6400 peak
ev zx5 600 cont./2400 peak
Posted 13 November 2012 - 11:12 PM
The formula to translate watts values to volts is this one:
Peak Limiting voltage = SQ Root (Peak speaker rating * speaker impedance)
It's also recommended to further multiply that number by (SQRoot(2)/2)=0.707. That's the number to input the DSP.
As for RMS limiter, if you want 12dB (what I recommend) of headroom then you enter the speakers continuous watts rating divided by 4.
Posted 14 November 2012 - 01:21 AM
watts continuous divided by 4=400 + the 1600 continuous = 2000,and i was wondering can u help with the recommended crossover setting for the speakers,and should the xover for the tops match the bottoms?
Posted 16 November 2012 - 11:12 AM
Posted 16 November 2012 - 12:13 PM
Doesn't matter for which i-Tech the settings are for, just the speakers, so for the JBL SRX725:
Peak Limiting voltage = (SQ Root (2)) X SQ Root (Peak speaker rating * speaker impedance)/2= SQ Root (4800X4) X 0.707=98V
For the EV ZX5:
Peak Limiting voltage = (SQ Root (2)) X SQ Root (Peak speaker rating * speaker impedance)/2= SQ Root (2400X8) X 0.707=100V
For the JBL SRX 728s:
Peak Limiting voltage = (SQ Root (2)) X SQ Root (Peak speaker rating * speaker impedance)/2= SQ Root (6400X4) X 0.707=113V
The itech measures the speakers resistance so you don't need to take it under consideration for the following calculations.
Continuous/RMS limiter setting for the 725:
1200W/4 (to get 12dB)= 300W
Continuous/RMS limiter setting for the EV:
Continuous/RMS limiter setting for the 728:
Hope you have a great gig
Posted 16 November 2012 - 01:20 PM
Posted 16 November 2012 - 01:28 PM
Given that you need about 12dB of headroom then that's the maximum you can get out of these speakers.
What about timing? attack and release times? have you figured them out yet?
Posted 16 November 2012 - 02:20 PM
Posted 16 November 2012 - 03:36 PM
Let me know the factory timing figures you have on the DSP...
Posted 26 November 2012 - 11:20 AM
2nd question,thinking about running 3 of my ev qrx 218s's (1200 cont. 4800 peak) off of my itech 8000 lets say if on the rms limiter i would usually set it at 1200 watts each chanell,if i used 1 on 1 channel which is a 4ohm load,and 2 on the other channel,would i give that chanell with the 2 subs which would be a 2ohm load 2400 watts on the rms limiter?also what would be my peak voltage settings for the chanell with the 2 ohm load,thanks in advance
Posted 27 November 2012 - 12:50 AM
Peak voltage for the 715 is 113V.
As for connecting two speakers on one channel, the peak limiter voltage stays the same while the RMS wattage doubles.
Posted 28 November 2012 - 08:46 PM
Posted 15 March 2013 - 11:24 PM
Posted 17 March 2013 - 07:01 PM
If you have a good 20A breaker for each itech then you're all set