Burson Soloist 3X Grand Tourer Head Amp/Pre Amp w/Sub out - 10W XLR

[PcChip]

if the cutouts match, how could you have placed pin1 in the wrong orientation?

 

[12kurupt]

if the cutouts match, how could you have placed pin1 in the wrong orientation?

the op-amp could go in two ways. The Pins go in horizontally, so option 1 say pin 1 is bottom right pin, if I do a 180 degree rotation (option 2), the pins are still in horizontal orientation, but pin 1 is now on the top left. I'm not sure if Pin-1 needs to go into the board in a certain way or not. Perhaps, someone had this same issue with no audio and rotated the orientation of the op-amps and got sound? I'll need to do a search in the thread to see if I find any comments on this. Most impressions from what I remember reading my first time through the thread is that it was relatively plug-n-play and nobody had issues like I'm having.

 

[lightoflight]

There was a report from a user that the op-amp slots were assembled in the wrong orientation from the factory. So, instead of following the picture for installing orientation, follow the op-amp slots pin #1 of your amp. Use a flashlight to ensure that it's seated properly and double check your work.

 

[12kurupt]

There was a report from a user that the op-amp slots were assembled in the wrong orientation from the factory. So, instead of following the picture for installing orientation, follow the op-amp slots pin #1 of your amp. Use a flashlight to ensure that it's seated properly and double check your work.

based on the manual + the fact that the images of each config has the op-amps in the same orientation regardless of whether they're in the input, volume, or voltage stage tells me you definitely need to place them in a specific way for them to work. I'll try again soon and take a look at the board to see if I see anything indicating where pin #1 should go. Thanks for the suggestion!

Lastly, I'm also considering the fact that I use the amp in the vertical position due to desk space and it's also possible the op-amps slightly lost contact and thus no audio came out? The Vivids seem to sit much more firmly into the slots than the 994s + 2590s.

 

[PcChip]

the op-amp could go in two ways

Yes but the cutouts are only on one side

 

[Pashmeister]

Lastly, I'm also considering the fact that I use the amp in the vertical position due to desk space and it's also possible the op-amps slightly lost contact and thus no audio came out? The Vivids seem to sit much more firmly into the slots than the 994s + 2590s.

Yeah they sit a bit loose that i feel like they might lose a bit of contact when flipping the unit over to screw it closed. I have only had one instance of lose contact and I just re-seated them and all was fine after.

I also very carefully gave a pin a very slight bend just to improve the hold a bit (it’s a risk though and u have to have good fine hands).

 

[Pashmeister]

the op-amp could go in two ways. The Pins go in horizontally, so option 1 say pin 1 is bottom right pin, if I do a 180 degree rotation (option 2), the pins are still in horizontal orientation, but pin 1 is now on the top left.

huh? Says who? Op amps should only be installed one way, following the notches. Well, if you’re rotating them then you are doing it wrong and may have installed them in the wrong orientation.

 

[12kurupt]

huh? Says who? Op amps should only be installed one way, following the notches. Well, if you’re rotating them then you are doing it wrong and may have installed them in the wrong orientation.

this makes sense. I just followed the image of config 1 in the thread, so as the orientation of the op-amps matched the image. It's possible the notches didn't match. I will need to try again later today when I get home.

 

[PcChip]

op-amps just arrived but the extensions have not yet - however they all fit and work without them (although yes the two large ones are slanted a bit, it's just temporary)

 

[PcChip]

so my first thoughts are that it sounds better than stock, but it still had that "veiled" sound to me, like the mids are kind of muffled and far away

I just swapped the two Burson output voltage op-amps with the cheap little JRC 5532D that came in the box and that veiled sound went away, sounds transparent now. Funny I should have tried that first before ordering all these op-amps lol

edit: just ordered 2x Burr Brown OPA2134PA from Amazon to try in the output voltage spot next

 

[12kurupt]

I just tried to install the op-amps again (994s + 22590s) into config 1. I checked that the notches matched, so pin-1 was connected properly and am still not getting any audio. I got some audio out of the right channel for a few seconds with hiss on the left channel and then audio completely went out.

 

[PcChip]

I just tried to install the op-amps again (994s + 22590s) into config 1. I checked that the notches matched, so pin-1 was connected properly and am still not getting any audio. I got some audio out of the right channel for a few seconds with hiss on the left channel and then audio completely went out.

Did your amp come with the cheap little black ones to use as testers? If so toss those in to reassure yourself the amp itself isn't broken

 

[12kurupt]

Did your amp come with the cheap little black ones to use as testers? If so toss those in to reassure yourself the amp itself isn't broken

i don't think it's broken. Perhaps the op-amps I purchased are faulty. Specifically the 994s. I was able to put the vivids back after having my issues and the amp worked properly again. I was told by SIL that I don't need to use the adapter w/ the silver pins, so I'll try to put the top half part only w/o the adapter and see if that works. If all fails, I may just return both sets and just settle for the vivids as the amp came stock. Pretty unfortunate experience thus far.

Attached is an image of how I’m putting the op amps in. The 994s on the outside have the adapter removed. Let’s see if this works.

Edit: with removing the adapters, I got sound out of the right channel, but hiss out of the left channel. Progress.

 

[PcChip]

If you think one is defective swap them and see if the problem follows

 

[12kurupt]

So, I removed the 2590s from the volume stage and replaced them with vivids and left the 994s in the input stage. I'm getting audio in both channels, so that leads me to believe my issue is actually with the SS2590s and not the 994s. The 994s are on the board w/ the dip 8 adapter. I'll reach out to Sparkos Labs and see what they say.

edit: After listening for about an hour with the 994s in the input buffer stage, I feel micro-details are pushed forward. I'm hearing what I'd suspect are sounds meant to be subtle in the background pushed forward. The low end seems to also have come up slightly and the brightness from stock vivids in all stages very much so tamed. I do tend to lean towards enjoying a brighter sound sig, so the 994s may not be for me. I wish I could see if the 2590s balanced things out, but unfortunately no sound comes out with those in the setup.