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
The OP is 100% legit!
I stand by every word I have written in this forum.
I would welcome Mr. Kevin Deal, to join this conversation and present his side of the story, as a matter of fact, I would like nothing more!

As for equipment matches, this is of no relevance in this matter.
NO equipment, should blow up your speakers, no matter what it is matched with.

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.

I seriously doubt that he is wrong, however, if someone finds out
otherwise, then we would all like to know.


Sorry you had problem with your 30k speakers. For that price you should be blaming the speaker company.  

I have throughly enjoyed my dialog HP.  Will soon add KT150’s.  China is wonderful too, filled with warm and kind people.  


Most tube preamps need to be turned on BEFORE the power amp because the period when the output coupling cap charges, a large DC swing is sent to the amp. The opposite is true when turning them off, power amp must be first.

If you use a tube power amp (NOT A HYBRID), this doesn't apply as tube power amps cannot amplify DC. You may still hear a pop at switch on or switch off.

I'm sure there'll be some folks who argue about this, but it's a fact of life if you're a tube enthusiast.

This whole Thing would make more sense to me if the secondary OUT of the preamp connected straight to the IN of the powered sub section of a hybrid ESL/Powered Sub speaker. Then I can see how rouge DC from the pre straight to the powered sub section could toast the sub section’s amp or power supply. Just a little baffled at how the rouge DC managed to pass from the preamp, through the power amp and fry the speakers power supply?
Jim