2. amps-preamps
  3. 131501-88991

PrimaLuna Dialogue Premium Preamplifier. DESTROYS SPEAKERS!!


A few months ago, bought TWO of the above mentioned preamps. ( I have 2 stereo systems)
Within 6 weeks of the purchase, the power supply of my speakers burns out!
I purchase and replace the power supply.
Three days later, the second newly replaced power supply is burnt out!
After much investigative work and heartache, I discover that the Pre amp is the problem.
It is defective and puts out DC. which burns out speakers.
After, testing the second unit, I find that it is defective as well, EXACTLY the same problem.
I return the units to my dealer, who returns them to Prima Lune.

I received a phone call from a Mr. Kevin Deal, big cheese at PrimaLuna.
Told me that the capacitors, on BOTH units had failed and the units were putting out DC.
He even THANKED me, for being a guinea pig, and discovering the flaw in his units.

He offered me a pair of tubes, as "compensation" for my troubles!! What a joker!!

WOW, a pair of tubes for blowing my $30,000. speakers!!

The height of arrogance and total disregard for the consumer of his product.
To all audiophiles, do yourself a favour, STAY AWAY for this brand, unless you want your speakers cooked.

TOTAL lack of quality control, MADE IN CHINA junk, what more needs to be said.


Mr. Deal, WAKE UP, and STOP selling defective products!!


If, you are using PrimaLuna, and your speakers fail, check the amp or pre amp.

George


Montreal, Quebec, Canada.
thorloki
thorloki OP
19 posts
 
Hello Soundscapemd, 

thanks for your commentary.
Talking about "skewed", you are are PrimaLuna dealer, so, we take your comments with a bucket of salt.
I am sure that other speakers have been damaged by primaluna preamps,
and that the owner is not aware of the cause.
I am sure, that a "SAMPLE" of 2 would be more than sufficient for you, if
it was your speakers that were damaged!

Anyway, here is the issue, if PrimaLuna is, as you say, WHY does 
Kevin Deal, not come on this forum and defend his product??

I ask again, WHY??

Perhaps, he is not aware of this discussion, PLEASE, do us all a favour,
CONTACT him, and let him know!!

We are all waiting to hear from Mr. Deal.



aniwolfe
761 posts
 
Sorry to hear about your 30k speakers. I have owned a Primaluna Dialogue Premium Int amp for almost a year now and ZERO issues. I am not a dealer, just a happy owner.
timlub
2,041 posts
 
It is commending to see all the support for Prima Luna, but that has nothing to do with nor excuse anything about this situation. Also it is fair to say that there is no way that Kevin could have any knowledge that this would happen and would never purposely sell defective goods.  Are you guys trying to support PL or just call the op a Liar?  It sounds like this guy had 2 Pre's go south. You know that the dealer knows about his thread,  isn't it  time for a response from him?  Thorloki,  did you at least receive a refund or do you still have these pre's?  Its tough for a dealer to refund everything and still layout what it would take to pay for your repairs.... Again, I would push the dealer, along with the manufacturer for some sort of insurance claim.... Guys,  If the op has really tried to work this out,  where else could he turn for support other than a forum like ours?  Overall,  I am still a bit skeptical,  but it is odd that after a few days of this,  the dealer has not responded.     
 
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almarg
9,670 posts
 
Thorloki 9-22-2017
The amplifier used was the Bryston 28B SST3 1,000 watt per channel
mono blocks....

Thorloki 9-22-2017
As for Bryston amps DC protection, I personally spoke to Mr. Brian Russell, one of the owners of Bryston, and he ASSURED me, that
the 28B SST3 DOES NOT have DC output protection.

What about DC **input** protection? (See my further comments below).

Also, looking at the Bryston site it appears that the SST designation is not used for their "cubed" series amps. Did you mean 28B3, or perhaps 28B SST2?

Ralph (Atmasphere), while a schematic for the 28B3 does not appear to be available, a schematic for the 28B SST2 can be found at the Bryston site here.

Note in zones B1 and C1 on the second sheet that a 68 uf capacitor is in series with the inputs!

Personally, FWIW, I believe the OP is sincere, but I don’t know how to reconcile the reported experience with the presence of those capacitors, which would block DC. Unless the amp is a 28B3, and that design omits any such capacitors. I note, though, that the bandwidths of both designs are identically specified, down to "<1 Hz," which suggests that they may be similar in that respect.

Regards,
-- Al


erik_squires
16,299 posts
 
OP - Do you have any idea the brand of caps that failed?

As a speaker maker (hobby) I'm very much into capacitor brands, I'd be very curious if there was a failure in a Mundorf or SCR, especially if there were repeats.

Best,


E
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