RMS Vs peak....again

[Ruiner]

Apologies, I know this has likely been done to death but couldn't find a specific answer via search.

 

Basically my 2x12 Zilla cab is 4ohms and 600w.

 

Just picked up a v1 Darkglass MT500, and stupidly only now realised that whilst it's 500w RMS at 4ohms, it's actually 750w peak.

 

For those better versed with this stuff than I (most people here I'd assume) am I going to need to get a different cab or will the Zilla likely be fine as long as I'm not running the volume super high. Or is the peak of 750w always going to need to be accommodated by the speaker, regardless of volume?

 

Greatful for any advice.

Edited yesterday at 08:59 by Ruiner

[Dan Dare]

Don't worry. Speakers will happily tolerate short bursts of as much as twice their rated power. Add to that the fact that an amplifier rarely if ever delivers its full rated power and you'll be fine. It will be obvious from the sound if you are pushing it too hard. Just back off the volume in the unlikely event that happens.

[warwickhunt]

Absolutely no need to worry about the ratings or the pairing of the amp/cab; generally the biggest/only worry or consideration is not getting the impedance wrong i.e. plugging a pair of 4 ohm cabs (which is 99% sure to be 2 ohms) into an amp that is rated down to 4 ohms minimum.

[Bill Fitzmaurice]

My speedometer goes to 260 KPH, and as it's a BMW it can reach that. That doesn't mean I have to drive that fast. 130 KPH is quite sufficient. Just because you have a 500w amp doesn't mean you'll ever use that much power. If you were to measure it you'd find that you seldom go over 50w. That's a good thing, as the majority of speakers will only handle at best half their thermal rating before exceeding their mechanical limit. As for peak ratings those are marketing piffle only worthy of being ignored.

[BassmanPaul]

Bill, If you did drive that fast the New Hampshire cops would be on you pretty quick I think.

 

Edited 22 hours ago by BassmanPaul

[Bill Fitzmaurice]

Not all all. The limit on the Interstate north of Concord is 70/112, so they don't bat an eye if you're doing 80/129. If you want to see nuts try the New Jersey Turnpike. 90/145 is common, and most of the cars you see doing that are junkers that probably aren't safe at half that speed. And if you've ever driven in Quebec you know that the speed limits there are just suggestions that are usually ignored. 

Edited 21 hours ago by Bill Fitzmaurice

[Ruiner]

Thanks everyone for the advice, it's much appreciated 👍 

 

Basschat to the rescue yet again.

 

Looking forward to trying the Microtubes 500 out properly next rehearsal 😎

[Beedster]

18 hours ago, Bill Fitzmaurice said:

My speedometer goes to 260 KPH, and as it's a BMW it can reach that. That doesn't mean I have to drive that fast.

 

The truth of it, and nicely put  

[Chienmortbb]

17 hours ago, Bill Fitzmaurice said:

And if you've ever driven in Quebec you know that the speed limits there are just suggestions that are usually ignored. 

The French Connection?

[Bill Fitzmaurice]

Where driving is concerned the Quebecois are only slightly better in following the rules of the road than the Italians. But in the great Commonwealth of Massachusetts one has to fail an IQ test to get a drivers license. 🤪

[rwillett]

2 hours ago, Bill Fitzmaurice said:

Where driving is concerned the Quebecois are only slightly better in following the rules of the road than the Italians. But in the great Commonwealth of Massachusetts one has to fail an IQ test to get a drivers license. 🤪

 

Having worked extensive in Germany, Belgium, France, Italy, Spain and Greece, nowhere is as bad in Europe as the Greeks and their driving, especially in Athens. 

 

Mind you the only time I have ever closed my eyes and actually thought we were 100% going to crash and die was India. We didn't, but I was terrified. 

 

Did a three week trip around India and nothing prepared me for how bad it was. For one traffic jam going in to Delhi, our driver simply drove across fields as do many others to avoid the jam. This is in a modern version of the old Austin Cambridge. Overturned lorries, card running at night with no lights, cars going down the wrong way on streets. All completely mad and yet we never actually hit anything.

 

Rob