Primaluna’s exclusive Adaptive AutoBias

Posted on 04/07/2014 by beheerder

Primaluna’s exclusive Adaptive AutoBias

Bias is very important. If anybody tells you that they have auto-bias, ask them precisely how. It’s likely to be untrue. As with all PrimaLuna amps, you never have to worry about biasing your amp ever again, and the need for matched tubes is eliminated. Just plug in EL34, KT88, or KT120 (as well as many others) and AAB does the rest while improving sound quality. Tubes are constantly monitored and kept in their best operating range, reducing distortion by up to 50%! To learn more about PrimaLuna’s Adaptive AutoBias check the link http://www.primaluna.nl/faq_autobiaswhitepaper.htm

 

 

Posted in Algemeen info - Informations générales, DiaLogue Series, PrimaLuna, Versterkers - Amplificateurs | Tagged | 2 Comments

AC Offset Killer circuit. A PrimaLuna exclusive.

Posted on 01/07/2014 by beheerder

AC Offset Killer circuit. A PrimaLuna exclusive.

PrimaLuna’s parent company Durob Audio B.V.. sells this as a stand-alone item since many years under the AH! brand name.
It’s job is three-fold. It filters the incoming main AC. It will sound logic for everybody -I hope- that starting off with clean power is a big advantage. Specially toroid power transformers can react in a nasty way on dirty AC. They start to hum mechanically. No fun. In fact this was the reason we developed this circuit. We were importing hundreds of Krell KAV-300i Integrated Amplifiers with humming transformers . With our circuit the transformers became dead quiet. The toroid PrimaLuna transformers are already dead quiet by the way WITHOUT the AC Offset Killer circuit. Next to that the AC Offset Killer circuit also prevents that any dirt created by the amplifier -yes, that’s normal- goes TO the main AC circuit. What’s more? The AC Offset Killer circuit also prevents damage by (too) high voltages …

The coming days we tell you more about what you find in the PrimaLuna Amplifiers.031-PrimaLuna DiaLogue Premium HP Integrated Amplifier Black-high resah2

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HP stands for High Power . . . and HeadPhones!

Posted on 27/06/2014 by beheerder

HP stands for High Power . . . and HeadPhones! It’s easy to get more power from a tube.  Run it harder.  You will see claims of up as high as 100 watts from a pair of KT120’s.  Initially, the customer is happy.  More power is better, right?  Well … talk to the same customer in a year.  PrimaLuna amps are famous for long tube life, running cool, and being absolutely the easiest amplifier to own.  What we’ve done is increase the power and output transformer size, added another Adaptive AutoBias board, and all the supporting circuitry required to run eight power tubes instead of four.  Doubling the power and increasing bass slam.  Customers can use almost any tube on the market. EL34, KT88, KT120 and even KT150’s. The new headphone amp may be the best you ever heard.  Why?  It’s running from all the power tubes!  An elegant, well designed circuit allows you to switch from speakers to headphone as you wish.  Also if you love private listening, this amp will wow you!

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PrimaLuna Logo!

Posted on 04/06/2014 by beheerder

All tubes that come with our PrimaLuna (as well as Mystère) products, come with a printed logo. Why? Well because I think it looks nice. It looks professional. It proves that these tubes are TESTED by us. And yes … it is free advertisement.

The EL34, KT88, 12AU7, 12AX7, 6SN7, 5AR4 come from China and pass our PTS™ – Premium Tube Selection process. All PrimaLuna products come with PrimaLuna SilverLabel tubes which are pre-selected by us following our simple 60 out of 100 rule (PTS™ – Premium Tube Selection) and as such, are already “special” when compared to other standard tubes on the market.

The new KT120 tube however is not made in China. It is Made in Russia for the American owner of the Tungsol brand. These tubes in fact travel quite a bit before you are listening them. Made in Russia. Sent to USA. Sent to the manufacturers using them. In our case the tubes are sent from USA to The Netherlands as entering foreing products into China is a time-consuming depressive job. So … the KT120 tubes we  have sent out till now HAD NO PRIMALUNA LOGO. 😦 😦 :-(.

But … as of today, we also have in The Netherlands a tampon printing machine to print our logo on the tubes! After 1 day instruction by the supplier, Richard immediately started printing the PrimaLuna logo on the Tungsol KT120 tubes!

Next to that all tubes are tested by Richard with our Amplitrex AT1000 tube tester. To be sure we supply you with good tubes and to be able to make matched sets  for the customers who prefer that.

Below a couple of pictures to give you an impression!

With kind regards,

Team PrimaLuna

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