It seems like most people power the SRX series cabinets way over their RMS ratings. I have always set my RMS limiters below the RMS ratings of my cabinets and my peak limiters at 2x the RMS ratings of the cabinets. If I'm not using my ITechs I will use my QSC 4050 HD in stereo so thermal issues are at a minimum. Are the limiters in the driveracks and units like the (DBX1066) going to protects your speakers from thermal damage?
EDIT:
Side note: One of my tech's roasted a 718 this past weekend because he did not check to see if the RMS limiters were engaged. This was using a ITech 6000 (1500 watts 8 ohms)When they are engaged they are set for 500 watts 8 ohms.
Hi !
We are a lot here using srx rig ! I am completely lost with this rms limiters. My 728's are fired with 2 x PL4.0. Am I in trouble pushing them ? how can we set a limit with a regular analog crossover such dbx234xl or similar process ?
If I understand correctly : Peak Watts : 6400W and average is 4000W
So ohm law states : V= R*I or P = V*V / R and heat losses are P = R * I * I
So :
4000w * 4 ohm =16000 and sqrt(16000) = 126.5V and 4000/126.5 = 31A = To get Max output from an amp.
And at Peak power : 6400 * 4 ... = 160V and 160/4 = 40A.
For sure, there is cable and distance and also reactive contribution but let keep it negligeable.
My question here is : If from an outlet you can get at maximum 120V and 20A - How is it possible to reach Peak limitation under these specific conditions assuming that the impedance will remain around 4 ohms.
So if my understanding is okay, with this voltage and current limitation, how its possible to reach the drivers Watt limits ...
Please correct me if I am wrong !
Thank you,
Othmane