I’m trying to figure out what my clean channel is so noisy.
I’ve taken it to 2 techs who couldn’t work on it without a schematic. It’s not tube related as we swapped every single tube out multiple times and nothing changed.
There’s a lot of background noise on the clean channel that seems to be related to the volume and EQ knobs. I got it used and I’m not sure if this is normal behavior or not. The gain channel is totally fine.
Welcome to the community @rollylama 
I must congratulate you for such as well posed question.
I am pretty sure Fryette will work with any reputable tech near you, including sharing schematics.
They also will accept this for a repair if you so wish?
Let me known what you want to do.
Regards
Dan
Thanks! Yeah I’d probably opt to send it in at this point and just get an entirely clean bill of health.
The problem of clean passage is a common problem. I sent an email to fryette, and they said that this is how it was designed. I don’t know if this problem can be solved.
Regarding the bottom noise of clean, there is no distortion channel. I don’t know if fryette has tried to solve it. If so, you can publish the solution here. Thank you. Memphis is a very good box. I like it very much.
Hi 亮,
Glad you like the Memphis. This videos above are from an amplifier that has some issues and needs a services. The Memphis is no more noisy then any other amps of type. Can you post a video of what you mean? It would be interesting to see.
Regards,
Dan
There is a distortion channel. This noise is on the clean channel and I’ve been trying to figure out how to get it fixed since December 2023, lol.
My question is the same as the video he posted. It should be like this from the factory. This is what the brand new purchase is like.
I’ve completely given up on this now.
What have you given up on, this?
That’s quite easy to do,
Here to help if you need something else.
Regards
Dan
I told you that my problem is exactly the same as what he said. The background noise of the clear sound channel is very large. You can refer to his video. The distortion channel is completely fine, and the electronic tube has also been replaced. So can you provide a solution? I have sent you an email before, but you said it was normal. I know that this situation will be solved. I am a foreign user and it is impossible to send the machine to the United States. I think the cathode resistance of the clear sound channel and so on is needed. Have you found any such problems when you open your inventory machines?
My problem is the same as the problem in his video. I even changed a reverb line that costs hundreds of yuan, but it still can’t be solved. I think it’s because of the circuit design. Please troubleshoot and tell us how to solve it.
Hi
If you would like a local tech to take a look at it we will do our best to support that.
There is not much that can be done by an end user and without seeing the unit.
You could try and identify a nosy tube. If that is not the issue, a tech will need to see it.
Hello, I have replaced all the tubes. I think it’s a design bug, and I need your help to look at it. And my four el84 tube plates have also been cut by technicians. I don’t know if it’s a problem with the cathode resistance.
Hi
Sorry there is not much we can do like this. We can support a local technician in an investigation. I’m not sure what your point is about cathode resistance.
Please give me a solution according to our feedback and the video sent by the people above.
Hi
Let me get some advice from the shop. Is there a problem working with a local tech?
It is normal for the clean channel to make more noise than the other channel on the Memphis.
I wonder if that is what your experiencing ?
I think I hear more on the video. Hard to tell.
Mine is way noisier than the gain channel. It’s even noisy when the volume is completely rolled off. Apparently it’s not normal and I’ve yet to figure it out. It’s not tube related. Took it to Bill Webb and he couldn’t figure it out.
C.S. email communication is spotty. I’d like a schematic; I don’t want to bother a tech with making him sign up on the forum to get it.
What I am hearing in the video is hiss noise. Is that what you are referring to?
If so, the gain channel is in fact way noisier in terms of hiss generation compared to the clean channel. However, the gain channel has a master volume which attenuates a lot of the background hiss. The clean channel doesn’t have a master volume. It is running wide open, therefore no noise attenuation.
To see what I mean, set the gain channel to the lower gain switch setting and turn the master volume all the way up. Now compare the noise between the two.
This is not a defect or design flaw. The Memphis clean channel simply has more gain than a typical clean amp channel, which is how it gets its edge of breakup sound.
I also heard a bit of popcorn noise way in the background in the first video. That is probably coming from V1. I would recommend a JJ ECC83 is the first stage to reduce hiss, but it won’t make a big difference.
We can send a schematic to a repair shop if they contact us and request it, but that’s probably not going to help you.
Dave