Hafler "Trans Nova" P1500

imix500 · 9th January 2007, 12:32 AM

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!

Leolabs · 9th January 2007, 12:34 AM

What is the original application for this Hafler amp???

imix500 · 9th January 2007, 12:36 AM

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.

imix500 · 9th January 2007, 12:42 AM

..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)

Leolabs · 9th January 2007, 12:43 AM

Why not ask/email Hafler???

anatech · 9th January 2007, 12:49 AM

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

imix500 · 9th January 2007, 12:49 AM

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.

anatech · 9th January 2007, 12:56 AM

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.

imix500 · 9th January 2007, 01:01 AM

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?

imix500 · 9th January 2007, 01:04 AM

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.

9th January 2007, 12:32 AM	#1
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	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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9th January 2007, 12:34 AM	#2
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	What is the original application for this Hafler amp???

9th January 2007, 12:36 AM	#3
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	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.

9th January 2007, 12:42 AM	#4
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	..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)

9th January 2007, 12:43 AM	#5
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Why not ask/email Hafler???

9th January 2007, 12:49 AM	#6
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	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

9th January 2007, 12:56 AM	#8
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	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.

9th January 2007, 01:01 AM	#9
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	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?

9th January 2007, 01:04 AM	#10
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	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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