Proline 3000 - People blowing drivers or Amp |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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There still are ‘sensitive’ drivers if you’re not fussed about linearity or broad response |
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Yes - and confirmed by the official JBL service center here. I don´t understand it either. It does sound crazy. Hopefully I´ll get the cab into my workshop this week, then I can investigate further. |
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Earplugs Are For Wimps!
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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Only possibly way I could imagine that is a magnetic field flip, but surely it would die before that happened. And that would affect both coil's relative motion surely. Weird.
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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Or, it was always like that, but only got noticed after something else (possibly related to the same overheating event) caused the enquiry to the tech. Still doesn't explain the bullshit explanation though.
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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He noticed some bass-end cancelation at a gig and found the odd cab/driver. Maybe one of the coils has burned out - or through and causing some sort of short-circuit, who knows. Apparently the guy at the service center has seen this before with these drivers. The blurb for the thing talks about "Dual-Bridged Technology, Class D", so anything is possible! |
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Earplugs Are For Wimps!
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rhythmsandy
New Member Joined: 19 July 2016 Status: Offline Points: 8 |
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I think there are few problems from proline.
1. Input signal Clipping which could have been better but how many of the users are actually clipping. 2. The bass grip and the restoration of kick drum hit is amazing as many has expressed. Probably thats happening because its not really class H its because of Class G kind of operation. 3. NTC inrush limiting is punny and there are many places the amp is under engineered. Which could have been better if it would have solved the above issues but prices is what everyone seems looking at. How many would come forward if the price is about 2.5x or 3x and yet has drive capability of the proline 3000? As far as I know many who drove Class D amps never said its better than Class AB/H but none of them who i know tried proline 3000. Look at the following input clipping system where the input of the amplifier itself is getting limited and giving this soft clip. Can anyone rate it that if thats the clipping behaviour of the amplifier then would that be ok? https://www.dropbox.com/s/n24lwg2926kn2qj/input%20limiter.JPG?dl=0
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Yes, some good points. I´ve never used a 3000, but it sounds like it does what it says on the box and a lot of people just don´t understand AES ratings and low crest factor source muzak pushed to the limit, etc. As regards the clip, it´s impossible to comment without more data, ie what was the input voltage at that point. I´ve just looked at the specs for the amp and see that it´s input sensitivity is 0,77V. That´s actuall quite low for such a big amp. Most will use 1V, or more - in order to avoid 'premature' overdriving and clipping. So that could be an issue with the amp. |
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Earplugs Are For Wimps!
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thes
Registered User Joined: 24 May 2018 Location: Italy Status: Offline Points: 29 |
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Btw, on thomann website the Proline 3000 ( and ta 2400 too) are now advertised as class AB amplifiers. Can someone confirm this?
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concept-10
Young Croc Joined: 17 May 2016 Status: Offline Points: 1292 |
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Phone them.
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thes
Registered User Joined: 24 May 2018 Location: Italy Status: Offline Points: 29 |
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I was thinking to send them an email but, considering the fact that someone else build those amps for thomann, i doubt they know this kind of details. It's been a year since i'm checking their amps on their website but i swear that today is the first time the "class AB" classification is present. Must have been added recently.
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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These are new versions of the amps. The pictures on Thomann website, need updating. I just checked the original manufacturer's web page. |
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Global Depopulation - Alive and Killing.
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thes
Registered User Joined: 24 May 2018 Location: Italy Status: Offline Points: 29 |
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Really there are new versions of those amps? Even proline 3000's price has changed: 658 euros before 599 euros now...i'm intrigued Can someone confirm? If those amps are in class AB now they should also sound better...would be nice to know much more. Would love to use a proline 3000 in my home setup Are these originally manufactured by Deton?
Edited by thes - 07 April 2019 at 1:27pm |
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