RCF 312A Lim Prot

[thex-faders]

Hi all,

Had an issue with one of my speakers last night. The Limit Protect came on.

I was doing a pub gig, level control on speaker at around 2 o clock, input sensitivity on 0db line.

Wasn't pushing the mixer overly, but it was a very warm night with lots of people packed in there. I wanted to know what are the common causes for the Limit Protect to come on with the RCF Art 312A?

Does anyone else have/had this issue before as it worries me I am doing something wrong and ultimately ruining the speaker in the long term?

Thanks
Tom

[Twinspin]

I run mine at 6 o clock full on and control them from the mixer that way that way they are getting a clean signal so long as you dont trash them.

[sweetie]

I run mine at 6 o clock full on and control them from the mixer that way that way they are getting a clean signal so long as you dont trash them.

i think it would be better to run them at 12 or thereabouts as thats commonly 0db in active speakers

[Solitaire Events Ltd]

i think it would be better to run them at 12 or thereabouts as thats commonly 0db in active speakers

I'm sure that's what the RCF rep said when he was at RSD doing a demo. I've always run mine at 12 o'clock.

[Twinspin]

Ive run my RCF cabs on full for five years since i got them and not once have i had any problems with them.

[sweetie]

Well there's a Dj on a different forum who ran his subs at full and blew the drivers. Lucky to get them fixed under warranty too.

[Twinspin]

They probably have got them on too loud at the mixer i think personally.

What i was told is that i should run the amplifiers flat out on the speakers and then the volume i can control using the mixer sliders or the master volume.

I will appologise if what im saying is wrong. But ive always run my speakers like that and never had problems with any of them.

[thex-faders]

I tried a couple of 'experiments' if you like to see if it was a cable or other problem in the system causing the RCF to enter limit protect.

I found that giggling the cable caused it to enter limit protect... I tried another cable and it seemed to be ok. But the questions is, would a loose or dodgy cable cause this or was I just lucky that a new cable eliminated the problem?

Could it actually be the XLR connection in the speaker causing the problem? A solder or other issue like that?

Tom

[Twinspin]

Ive seen this happen before on one of my friends cabs he has the 315a and when he switched it on the limiter light come on and stayed on.

He turned the speaker off changed cable put a new xlr cable in switched the speaker back on and it was fine then.

[Solitaire Events Ltd]

They probably have got them on too loud at the mixer i think personally.

What i was told is that i should run the amplifiers flat out on the speakers and then the volume i can control using the mixer sliders or the master volume.

I will appologise if what im saying is wrong. But ive always run my speakers like that and never had problems with any of them.

I thought you've had horns blow before?

[Twinspin]

I thought you've had horns blow before?

Never blown any on the RCF cabs. It was the Mackies where that happened.

[Solitaire Events Ltd]

Never blown any on the RCF cabs.

I'm sure you had something repaired on them? :confused:

[DazzyD]

I tried a couple of 'experiments' if you like to see if it was a cable or other problem in the system causing the RCF to enter limit protect.

I found that giggling the cable caused it to enter limit protect... I tried another cable and it seemed to be ok. But the questions is, would a loose or dodgy cable cause this or was I just lucky that a new cable eliminated the problem?

Could it actually be the XLR connection in the speaker causing the problem? A solder or other issue like that?

Tom

I'm not an active speaker expert but, with my limited knowledge of electrical/electronic circuits I'd have to answer Yes to all of your questions! It could be any of those things. It could be a loose connection on the XLR connector on the cable, too!

[Twinspin]

I did have something repaired on one of the RCF's it was a blown woofer But when i said not blown them i mean not through been overdriven. That was caused by mic feedback. Someone shoved a mic infront of them a while ago.

Any of the other problems have just been. The pots on them needed a clean.

[thex-faders]

I'm not an active speaker expert but, with my limited knowledge of electrical/electronic circuits I'd have to answer Yes to all of your questions! It could be any of those things. It could be a loose connection on the XLR connector on the cable, too!

I will take additional cables to next gig at the weekend just to use process of elimination on the cables and then if the problem still persists I will look at getting the speakers in for repair or looked at.

Can anyone recommend where I could it looked at in Essex?

Tom

[Johnny P]

They are not in Essex but http://www.ampman.co.uk/index.html are good

[hadyn]

just had one of my rcf 315a speakers repaired at ampman
very good service but expensive
small circuit board size of a fag packet had to be changed and got no change
out of £230.00.

[thex-faders]

Hi gents,

This happened again last night after months of it being fine so I really want to get to the bottom of this problem.

Reading the manual: "the red led is ON when the system limiter is acting to prevent clipping condition"

So am I correct in saying that if I whack my mixer volume up full and blare out some drum and bass its highly likely to cut out the limit protect to try and save the speaker?

Well as previously mentioned I run two of these at the same input gain and the other speaker was fine all night.

Any help would be appreciated.

Tom