Considering switching from Audio Research to PrimaLuna, troube with VS115 amp


Hello everyone, I have question that I hope some of you either can answer or have an opinion on. Ever since I was 17, I have always wanted to own Audio Research equipment. I’m 56 now, and finally was able to fulfill my life long dream. My first acquisition was an ARC LS15 pre-amp bought here used in mint condition. I paired it with a Vincent 331MK hybrid amp also bought here used in mint condition. The resulting sound was impressive. After that, I started looking for an ARC amp I could afford. The resulting search found me an ARC VS115 amp also here in used, awesome condition. This is where my problems and my doubts started. Upon hooking up the amp to my system, a tube in the left channel arced and blew a resistor. I had to take the amp to an ARC dealer and he installed a new resistor and suggested I buy all new tubes from ARC for the amp. I did and when I got back home, I again hooked up the amp and immediately upon turning the amp on, I started to hear thumping sounds coming from my left speaker, then, two left channel output tubes started to glow a very bright orange, and then white smoke started to rise from one of the tube sockets. I immediately turned the amp off. I called the dealer and he suggested I mail the unit back to ARC. I did and I am now waiting to see what they say.

During this time, I started to search out other brands and came across one called PrimaLuna. I have watched their videos and seen them compared to ARC equipment. Their build quality seems to be superior to ARC and the reviews are over the top. I am looking at their Dialogue Premium HP amp and their Dialogue Premium pre-amp. For what they cost, considering how they are built and supposedly sound compared to units costing 3 to 4 times their price, they almost seem too good to be true. Anyway, my bubble has been burst, and in simple terms, I am considering jumping ship and going with another company instead of ARC, despite all those years of drooling and waiting.

My main question is this, is there anyone out there that either owns PrimaLuna or has had experience with the equipment and can give me their opinion on owning and using it. Then, my second question is how does PrimaLuna really compare to other high end equipment such as ARC. Kevin Deal in his videos on PrimaLuna makes a very compelling case for the equipment. In one video, he compares an ARC LS17SE to the PrimaLuna pre-amp.

My last question is in regards to my ARC VS115 amp problems. Anyone have an opinion on what is going on with my amp or a VS115 in general. For those of you who want to know what else is in my system, I am using KEF 104ab speakers, a Cambridge Azur 752BD Blu-ray player as my CD player, Morrow Audio Cables and I am considering getting the Sony HAP-Z1ES music player for my digital files.

I greatly appreciate all who take the time to comment and give their opinions. I will be glad to answer any questions you may ask or provide additional. Thanks for your help. Steve.


128x128skyhawk51

Showing 2 responses by lostbears


 When you got the amp did you bias the tubes after installing them? Were the tubes marked so they could be put back in the same socket? How old were the tubes? Did the dealer install the new ARC tubes? Were the properly biased?

 A tube blowing and taking out a protection resistor is no big deal. I have had it happen a couple of times in the last 30 years. The new tubes are under warranty and having ARC will completely go through the amp and make it work and sound like new. But when it comes back you will still need to check the bias a couple times just to make sure it doesn't drift.

 I have not heard the VS115 in my system but it was suppose to be a very good sounding amp. I have heard the PrimaLuna amps at my ARC dealer. The are very nice sounding amps but not in the same league as ARC. Kevin Deal is trying to sell PrimaLuna so he is talking it up. 




The VS115 was a highly regarded amp. It was a big improvement over the VS110. The amp has new tubes and will be completely gone through and just like new. I would take my time and let the tubes break in a bit. Get to know that amp and what it sounds like before making a decision to sell it. Once it is completely broken in, you could bring home a few amps one at a time and compare them. If it were me I would look at a used Ref amp as opposed to the  VT80 . The Ref 110 is still excellent and not that expensive anymore
 
But I would be more inclined to upgrade your preamp. The preamp has more impact on the sound then the amp. And preamps have come a long way in the last 10 years.  Maybe something like an LS25 mk2. That will have far more of an impact on the sound of your system.