burning smell coming from speakers
Posted 26 August 2012 - 10:24 PM
Posted 26 August 2012 - 10:50 PM
You need to keep in mind it's not recommended to mix different boxes because the difference in frequency response will cause comb filter effect between the two. That is true unless you have very expensive gear.
Posted 27 August 2012 - 12:25 AM
Posted 27 August 2012 - 02:03 AM
Yes, that's clipping... clipping the signal at any point in the signal chain is still clipping even if the amp is not the cause of it
Note, due to the way clip sensing on the amp works, if you clip the signal before the amp, the clip LED on the amp might not light on most of the amps.
Limiters only limit the amplifiers maximum peak or average voltage, but it's not a magic cure for all clipping.
You avoid the over excurtion and overheat damage by:
1. limiting the amp to the specified speaker long term power specs and many times allot less then the spec (to avoid power compression).
2. Use a HPF to filter out the unreproducable frequencies that create huge cone movement, usually a 24dB/octave (IIRC Butterworth) at the -3dB point of the speaker.
3. Never clip anything on the signal chain!!!
4. Keep your ears open for destortion and back off a bit when it happends.
I suggest you read this article for more detailed knowledge about the whys and hows:
Posted 27 August 2012 - 08:52 AM
Posted 30 August 2012 - 08:39 PM
Posted 30 August 2012 - 11:15 PM
Did you set both limiters on the itech? Continuous and peak? If so then to what level?
Posted 31 August 2012 - 09:04 AM
I've once had an old EV sub driver smelling with the slightest overload and decided, the h*ll with it, I'll replace the thing when it fail. It lasted for nearly two years before seizure! But I had redundancy in the kit and could allow to lose it mid show. If your drivers are mission critical, use more restrain!
On the use of limiter, I see them as a protection for *exceptionnal* overload in the program material. I think if you are constantly bumping against the limiter in normal use, then the system as a whole is underpowered for the application. What's good about an expensive and powerfull amp like the itech, if you're gonna waste half its power by using a -3 dB limiter?
Posted 31 August 2012 - 03:12 PM
Posted 31 August 2012 - 05:02 PM
Posted 02 September 2012 - 07:36 PM
Posted 03 September 2012 - 11:25 PM
Posted 28 September 2012 - 09:59 PM