Macro Tech 600
Posted 28 March 2014 - 09:12 AM
Posted 28 March 2014 - 03:00 PM
The MA-600 pushes around 120W @16R (ohms), 220W @ 8R, 325W @ 4R, 400W @ 2R.
The MA is still powerful for the 50W driver, even at 16R. So, beware of clipping! Use the MA at half power, leaving the other half for headroom and excursions.
Personnaly, I don't like using fuses for cabs or drivers. If you have a limiter, perhaps use it! A compressor, if used well, can also reduce the likelihood of an overdriven driver. Note that the compressor will not halt or apply a brick wall to the sound as a limiter can do!
Hope this helps!
Posted 29 March 2014 - 06:27 AM
Posted 30 March 2014 - 02:49 AM
The usage of a line fuse is not recommended for live shows, if it blows then the driver is out until you can replace the fuse. Why not use a lamp, which also give you a visual warning and functions as a compressor and in the end like the fuse, or a more sophisticated zener based protection circuits instead?
All the above solutions are more for a passively amplified speaker with an internal crossover, where the HF driver is less protected then the LF driver. When you biamp the speaker and have a limiter (RMS and Peak) I just don't see the logic in putting in additional components.
Did you have repeating problems frying those drivers?
Posted 06 April 2014 - 08:39 AM
Posted 07 April 2014 - 03:58 AM
Peak limiters are used to make sure amps don't clip (that's sort of the type of limiter your behringer has). Now, if you matched the amp to the speakers correctly, you should be fine but since you're using what's available then our amp selection is a bit limiting. The behringer limiters are peak limiters, not RMS and have limited configurability (only threshold and release). To be more exact here is a deteiled thread about the behavior of the limiters. We might fall into category 1 ("if your power amps are too big for the speakers") in the link so I have a few followup questions...
The power ratings you provided earlier, are they RMS? What speakers are you powering?
Posted 07 April 2014 - 04:54 PM
One more thing if you do not mind,the lamp option I do not know what it is or how to use it. As you may have noticed I am an amateur to all this and greatly appreciate all your help!
Posted 08 April 2014 - 11:36 PM
Looking at the link I posted thoroughly (page 3 to be exact), the limiter in the behringer is both Peak and 3dB below that setting it has an RMS limiter, therefore if we set the peak limiter so that the RMS limiter will have the correct value, we should be fine.
I would start by setting the limiter to half the wattage specs you posted or a bit less, that way your drivers will be protected and the SPL will not suffer much if at all. The behringer takes values relative to the +22dBu it has on it's output so you need to translate the values you want to that +22dBu and the amps input sensitivity.
Keep in mind I'm trying to do my best here but the data I'm relaying on is not in the manual but rather measurements made by other (professional) users.
I'm guessing you're building your own speakers? Can you upload a picture of what you have? Some of the drivers have overlapping frequency response, so what frequencies you have the crossover set for them?
Posted 10 April 2014 - 06:47 PM
Posted 11 April 2014 - 12:41 AM
Looking forward to those pics.
If you need more help configuring the rig (I suspect you will), let me know.