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Old 9th January 2007, 12:32 AM   #1
imix500 is offline imix500  United States
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Default Hafler "Trans Nova" P1500

Hello all, so I have a question reguarding the build quality of these amps.
I have one at an install/refurb I'm working on that the owners want to reassign to dj monitors because it's cooked 3 pairs of speakers in the house (this is a large club).

Now I firmly belive it was just driven far too hard to the point where most of the
output signal was DC. Almost any amp will do this at a point so I can't blame the amp.

So my question is: is this amp capable of being driven hard every night in such an assignment as monitors for a dj?
Is the fact it cooked the speakers before itself a testament to the amp?
(Those who have ever mearly walked near a dj will know what they expect out of thier monitors.)
Thanks!
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Old 9th January 2007, 12:34 AM   #2
Leolabs is offline Leolabs  Malaysia
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What is the original application for this Hafler amp???
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Old 9th January 2007, 12:36 AM   #3
imix500 is offline imix500  United States
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Assuming you're being serious, I know it's a home amp.
Again, I didn't put this system in. I've just been fixing the installers blatent disreguard for the laws of physics over the past 6 months.
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Old 9th January 2007, 12:42 AM   #4
imix500 is offline imix500  United States
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..but in case you were asking about it's job at the club, it was driving a pair of Bose 302A's. (Which I'm replacing with EV Sx80's)
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Old 9th January 2007, 12:43 AM   #5
Leolabs is offline Leolabs  Malaysia
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Why not ask/email Hafler???
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Old 9th January 2007, 12:49 AM   #6
anatech is offline anatech  Canada
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Hi imix500,
Haflers were well built, although I haven't seen one of these before. Trust your instincts and use it for monitors. 2 ~ 2.5 A fast blow fuse in series might save the monitor if they oerdrive it again and it goes DC.

I would have a good look at it. Possibly it was improperly repaired in the past, not that would ever happen in a night club.

-Chris
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Old 9th January 2007, 12:49 AM   #7
imix500 is offline imix500  United States
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Do you think they would give me an unbiased answer? Personally I think the thing would just overheat and shutdown, but I could add a couple fans to help.
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Old 9th January 2007, 12:56 AM   #8
anatech is offline anatech  Canada
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Hi imix500,
Yes, I do think you would get an honest answer from Hafler. I hope anyway.

What monitors are you using or thinking of? Do they conform to a "home enviroment" speaker in terms of impedance? If so, you should be okay with the Hafler. They do not have a reputation for breaking.

-Chris

Edit: If you use fans, make sure you also cool the power transformer or it will open.
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Old 9th January 2007, 01:01 AM   #9
imix500 is offline imix500  United States
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Hey Chris, see that's where I'm not so sure with an amp that seems to be built for high quality control room monitoring. I'm sure it would do great in that application.
I'd just hate to put it in and damage a perfectly good amp cause it most probably will get occasionally abused in it's planned occupation.

Second question: the amp currently seems to be fine but having 3 pairs of 6 ohm speakers cook to a ~.5 ohm load three times- should I be worried about damage that might not be presenting itself right away?
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Old 9th January 2007, 01:04 AM   #10
imix500 is offline imix500  United States
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I've got a pair of eaw UB82's that would do the job no question, but because of space constraints I might have to go with some Control 28's or the like. They have the benefit of being cheap to fix.
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