But the amp has been out years and years and Deton seem as though they can't be bothered. I had two myself but sold them before they managed to someday accidentally shaft my drivers.

Yes but also customers have reported that sound quality degrades before clipping occures on the Prolien 3000 meaning the amp probably has no headroom like quality amplifiers do. Plus the Proline 3000 takes out drivers with even the slightest bit of clipping which is easy to happen. 

But some people who've used the amp say once it clips it behaves strangely, ArthurG said " http://i.viglink.com/?key=5c09f99ded5d8bdd5dfa393cd8dfdb9c&insertId=dc5da36bbfa897a7&type=S&exp=60%3ACI1C55A%3A3&libId=jpmzy0u801002gs4000DL1z3hv96w&loc=https%3A%2F%2Fforum.speakerplans.com%2Fproline-3000-people-blowing-drivers-or-amp_topic102780.html&v=1&iid=dc5da36bbfa897a7&out=http%3A%2F%2Fwww.ebay.com%2Fsch%2FConsumer-Electronics-%2F293%2Fi.html%3F_nkw%3Dproline&ref=https%3A%2F%2Fforum.speakerplans.com%2Famp-forum_forum24_page2.html&title=Proline%203000%20-%20People%20blowing%20drivers%20or%20Amp%20-%20Speakerplans.com%20Forums%20-%20Page%201&text=%3Cspan%3EProline%3C%2Fspan%3E" rel="nofollow - Proline , as well as all Thomann amps, has only a simple & cheap peak stop limiter that is rubbish. Lot of DC and square wave coming out when it clips. It put stress on the amp (the bipolar  http://i.viglink.com/?key=5c09f99ded5d8bdd5dfa393cd8dfdb9c&insertId=8e3c9c93c03e705a&type=H&exp=60%3ACI1C55A%3A3&libId=jpmzy0u801002gs4000DL1z3hv96w&loc=https%3A%2F%2Fforum.speakerplans.com%2Fproline-3000-people-blowing-drivers-or-amp_topic102780.html&v=1&iid=8e3c9c93c03e705a&out=https%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-53200-19255-0%2F1%3Ftoolid%3D10029%26campid%3DCAMPAIGNID%26customid%3DCUSTOMID%26catId%3D293%26type%3D2%26ext%3D254002945104%26item%3D254002945104&ref=https%3A%2F%2Fforum.speakerplans.com%2Famp-forum_forum24_page2.html&title=Proline%203000%20-%20People%20blowing%20drivers%20or%20Amp%20-%20Speakerplans.com%20Forums%20-%20Page%201&text=%3Cspan%3Etransistors%3C%2Fspan%3E" rel="nofollow - transistors  dont like it) and on speakers. You get what you pay for...".

NickyBurnell said "Because when they clip, just once, they cause a lot more damage than other amps in the same scenario. This is not hearsay or demonetization. I've owned one and the way it went from OK to nasty noise is not right. BPSound had one in install and it killed a load of Wembley B Lines and it was behind a Cloud Limiter.  The ones I was involved with were horrid. Maybe they are not all created equal?"

So maybe he's right, maybe Deton's consistency is appalling some are ok, some are bad.

I've seen them destroy entire sections of sound systems a few times, and while most of those times they were run well into clipping, I've seen them killing drivers without actually being driven to clip, but with good limiting with a nice DSP. It may have been that the drivers were quite old, but still, they're widely used in the amateur scene and I can't say many good things about them.

I tested them vs my Crests and then the FFAs, the latter cost much more but old used Crests aren't more expensive than a Proline. If you don't want to risk catastrophic consequences you better stay well out of clip (I think the actual clipping starts a little before the red lights go on, definitely Crest limiting is so much better). Most important, they don't sound that good, neither are so powerful, it was like night and day vs Crests and FFAs.

This kind of backs up my theory because I thought they did clip before they actually clip, I mean the sound quality degradation about 3db before clipping I heard backs this up. I never clipped the two I had but the sound quality loss about 3db from clipping and the horror stories I read a lot of places of people destroying drivers made me sell mine. I too do believe the clip lights are inaccurate and do think clipping occurs before the clip lights come on so this would lead owners to believe they're only just clipping the amp when in fact clipping occured a while ago at lower level and now they're BADLY clipping the amp regardless of the clip lights only just being tickled. 

I think the fact that they have huge supply capable of delivering very high currents will have something to do with it, as has been said many other amps will limit current if you push them to the edge with lot crest factor / clipped signal, the inf8 V2 had a bit of a rep for blowing drivers and i put that down to the very high current delivery , and the confusing limiter... 

+100

You really have to check exactly where these amps start to distort with a proper meter - or scope - not rely on the clip LEDs!

And a lot of people/amps will get away with it because of a weak PSU. It sounds like the 3000 does what it says, so will blow drivers unless properly limited. And you have to understand exactly what the AES specs mean, as well as compensating for the type of muzak and dynamics (crest factor).

I can still remember the first acid house dj thing I did - after a 'normal´gig. The highly compressed signal - and continuous redlining by the dj´s cost me 2 x Gauss 4583´s. An expensive lesson.  

Cant remember how the limiter was set, but the amp was kept below clip.

The people who do like you suggest most probably use other amps. Cant see proline amps in professional rigs

Yes bud but made for OHM who have reputation to consider so should be good amps.

Think you'll find they were not made for Ohm, but just rebranded Soundstandard amps, just like the Darq series.

UK has a long history of importing cheap chinese gear, rebranding it, and selling it for 4x times original price.

While others here cry foul of Chinese products..