I’ve wanted a PRS Archon 100 for years after playing one in a shop in 2015.
I finally got one ... now what?
Mine is an extremely early one dated 12/2013. I was aware of the loop hiss/noise issue on the early ones before I got the amp and got that addressed by a reputable tech. I provided the diagram that has circulated for years. The amp no longer generates additional noise when the loop is engaged.
It wasnt a particularly quiet amp before I took it in, but it is significantly more noisy since I got it back. It still sounds great but I hear both white noise and a low level hum. I will obviously take this up with the tech to see what happened and if we can make it quieter, but are these early Archons hopelessly noisy?
This is not a “pile on PRS post” and I really like the tone of the amp. I’m not averse to a bit of noise in a high gain amp, but I find it unusable in this case.
FYI, still trying to find something to ship in. The shape makes for a rare box size, and I don't want to pay 3 times as much for a huge box. If I don't find something soon, I'll cut one down since it isn't a delicate item. Oh, and thank Elvis!
Thanks for the feedback, everyone! It's really not a big deal, re-tubing the amp made a big difference, but the noise I was hearing was like a white noise or a static that was present at the same volume no matter where the amp volume was, and even if no guitar cable or anything were plugged into the amp.
I got it used for a great deal, so even if I could only use the gain channel (which didn't have the problem) it was still a very nice deal. Love this amp's tone anyway!
I just wanted to update this thread since I saw it’s popped up again.
When I got the Sonzera 20 it made a lot of white noise on the clean channel and it wasn’t especially quiet on the gain channel either.
I had one tech decline the job but another accepted, and he attributed the noise to very noisy tubes and a need to bias the amp, so he installed all new JJ tubes and set the bias. The noise was reduced perhaps by half, but was still present.
After reading about how some tube stores ‘burn in’ the tubes for 48 hours or so before selling them (and charge extra for it) I wondered if this might help my amp, so I turned it on and left the amp idling for about 12 hours one day and 8 more the next day. All that was the amp just sitting there with the levels all turned down and no cable plugged into it.
I think that did the trick, because the amp is very quiet now! I am extremely happy with it now, and it sounds even better than it did before getting a new set of tubes and a tune-up.
So, for anyone wondering about the Sonzera, mine issue was just old noisy tubes.
@caldera glad to hear it.
As for my Archon, I’m going to bring it back to my amp guy so he can validate that everything is in order after the loop mod was done. After that, I’ll try tube swapping. The amp came to me with all JJ 12AX7 and I have no idea if they’re original or newer. Once I get the amp back, I’ll raid my tube drawer and see what’s what.
As for the home remedy “burn in” process ... pretty clever and I’m pleased for you that it worked to reduce noise! I’ll keep that in mind for the future. Did you have it on standby?
My Sonzera 50 is noisy too and it drives me crazy. Strange thing Is it’s worse I turn the reverb about half way up. All the way up or down and it’s quieter but still noisyI purchased a used Sonzera 20 from Guitar Center online after reading reviews. Unfortunately, I did not catch the noise thread. Mine is noisy, especially Channel 1...like an AM radio off station...snap, crackle, pop Rice Krispies.... RRrgh. It's such a wonderful sounding amp though, which makes it all the more frustrating. I am going to ask my tube supplier (Eurotubes) about your burn in process, that seems plausible and promising. Thanks. I will repost results after installing new set of preamp tubes.