Official Blackstaramps Forum

Hey there! Thanks Mark for your update. I agree, the noise is nothing that will bother you when you're playing at certain volume, but it's still strange and rather unexpected for a brand new amp. I've poked Blackstar support again to see where this is coming from. I can't imagine why the phase drive...

Hi guys, the noise with a muted guitar connected is exactly the same. I'm still in touch with Blackstar support, they now mentioned that there are transistors in the power amp stage as phase drivers, if one of those is noisy, this could be the source of our problems. I'm also still waiting for an ex...

Hi there! I'm still in touch with Blackstar support, who told me to check V1 of the preamp tubes. As expected, no change. To show Blackstar support what we are experiencing, I took a short recording of my amp https://www.dropbox.com/sh/o67sxn293wrsr2k/gLtr7i3exe/Blackstar%20HT%20Studio%2020%20Noise....

Hi all, I had the power tubes replaced with the same type and the amp rebiased, this did not change the behavior with more noise in the clean channel. Reported this to customer support, let's see what we get. By the way, with the amp opened, I realized that the noise I described coming from the powe...

Hey folks!

Great video! I noticed that there is a BIAS and a BAL poti on the PCB of the HT Studio 20. The bias is clear, but what does the bal (balance) poti do, and should this be adjusted as well?

Cheers, Felix

Hi fellas! I received a reply from Blackstar support: "have spoken with out technical department and With the symptoms you are describing it sounds like its a problem with the output valves. This will have to be confirmed by a quick check over by a qualified technician and they will be able to repla...

Hey guys!

I just emailed Blackstar support, with a short summary of what we found so far. Let's see how good their service is...

Cheers, Felix

Hey folks! It's Sunday, my girlfriend is not around and I was bored... So here is how the signal flows throug the amp Input > EQ and Channel Vol. > Send > Return > Reverb > Emulated Out > Master Vol. > EL34 > Output Transformer > Speaker I have checked the effects loop and the emulated output, both ...

Hi guys! I recently bought a HT Studio 20 head and experience the same behavior. What I see is: - Amp switched on, cable connected to input - Channel and master volumes on 0 - Higher noise level in the clean channel than in the overdrive channel Is this what you see (or in this case hear) too? I hav...