Burson Soloist 3X Performance Head/Pre Amp - 8Wpc XLR with MUSE72320 volume control
Jul 1, 2021 at 7:20 AM Post #1,156 of 3,128
I tried lowering the volume from my source cause Alex (Burson) suggested that the line voltage from the D10 might be too high, but the distortion was still there. I switched back to my old JDS atom to my DAC and there was no distortion.

Alex is troubleshooting it with me at the moment. Hopefully my issue gets resolved.
But, have you tried a different source completely? For example, a phone or laptop?
 
Jul 1, 2021 at 1:39 PM Post #1,158 of 3,128
Alright joined team Soloist 3XP this past week! I'd like to try changing out the op amps from vivid to sparkos but frankly I'm a bit nervous. Is there a guide or a video showing how to change them out which ones are volume op amps and which one are input/output stage? Also since it's a sparkos I'm told they don't have reverse circuit protection so if I put them in the wrong way I can fry them. Just wondering if there is a dummy proof way to ensure I have them put in the correct orientation?



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Jul 1, 2021 at 8:36 PM Post #1,159 of 3,128
Alright joined team Soloist 3XP this past week! I'd like to try changing out the op amps from vivid to sparkos but frankly I'm a bit nervous. Is there a guide or a video showing how to change them out which ones are volume op amps and which one are input/output stage? Also since it's a sparkos I'm told they don't have reverse circuit protection so if I put them in the wrong way I can fry them. Just wondering if there is a dummy proof way to ensure I have them put in the correct orientation?



84b8d2caf12d96117e9aaf4db85a90803fe94557_2_666x500.jpeg



0776a652695eca95472f0e3717fd424d4dff1414_2_666x500.jpeg
If you look at the PCB board carefully, you will find + and - beside the opamp sockets. And also, it won't be fried if you put it in wrong direction, just that channel will has no sound. (I did it wrong at the beginning, and it works fine after I correct the orientation)
 
Jul 3, 2021 at 12:49 PM Post #1,162 of 3,128
I see you have 1266 headphones from Abyss. Does the Soloist drive them properly in your opinion?

Yes it’s the first amp that I’ve purchased that does so properly and I’ve got through about 10 Lol. I still need to roll op amps and I will play around with power amp mode using my Holo Mammoth KTE amp for volume control.
 
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Jul 6, 2021 at 1:39 AM Post #1,163 of 3,128
Burson is taking time in providing volume control chip to me. No update till now. Hopefully there will be news this week.
 
Jul 6, 2021 at 4:14 AM Post #1,165 of 3,128
Yeah, I've been told I'll be getting one sent out but also no updates. Not sure if I'm going to get tracking, or it will just show up one day.
 
Jul 6, 2021 at 4:29 AM Post #1,166 of 3,128
Hi guys,
Just a quick question, I just unboxed my Soloist 3x and set it up with my topping D10 / HD58X, and I'm getting a buzzing/distortion sound coming from the right channel of the amp. I've changed to another pair of headphones/ IEM and even tried both the 1/4" jack and 3.5mm, the right buzzing persists. I can't quiet hear it when there's nothing playing. But the moment music starts, it starts buzzing. I know it's not my RCA either cause i swapped them round and still the buzzing in the right side of my headphone's still there. As well, the noise floor seems to be really high even when I have it set to LOW gain and have my Heir Audio 8.A IEMs plugged in. Anyone experienced any of the above symptoms ?
After troubleshooting my soloist, turns out an op amp from my unit was faulty. Burson has been pretty prompt and more then helpful in my issue. They told me today they will be replacing the faulty op-amp and will be getting back to me with a tracking ID. I've been pretty happy with their promptness so far.
 
Jul 6, 2021 at 3:10 PM Post #1,167 of 3,128
If you look at the PCB board carefully, you will find + and - beside the opamp sockets. And also, it won't be fried if you put it in wrong direction, just that channel will has no sound. (I did it wrong at the beginning, and it works fine after I correct the orientation)
I ended up just emailing sparkos to see exactly the instructions on how to install... I got user guide from Burson's website (page 9)

https://drive.google.com/file/d/1juWvGo3icP60gctx1t46luBMHA6OIpVR/view

Their arrows match the orientation for the V6 vivids but that doesn't neccessarily align with the instructions on Sparkos website in trying to align the #1 orientation. There is a R + / - and L + /- on the input buffer but I didn't see it on the volume control side. Also the on the sparkos 3602 ops amps it doesn't have a +/- label anyway just a 1 in the bottom left corner.
 
Jul 7, 2021 at 1:55 AM Post #1,169 of 3,128
Volume control chip arrived today without an email from Burson. I thought they are still looking for replacement chip when they actually already shipped it. Will try installing it later.
 
Jul 7, 2021 at 7:43 AM Post #1,170 of 3,128
I have installed the new volume control chip and it is working. Problem is now I cannot exit the headphone power amp mode even after holding the menu button for 12 seconds. Anyone experienced this?

Edit: What I mean by working is that it has sound output now because when I first installed one of the two chips, the amp has no sound coming out from it. When I installed the other one, it automatically went headphone power amp mode and cannot switch it to normal mode so I really haven't tested if the volume jump from 51-52 is gone.
 
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