HT SOLOIST 60 PROBLEM

[rchaconsandy]

Hello, I have a HT Solist 60, when I play at low volume (Clean channel) it keeps clean but if I play louder it sounds distorted (increasing master volume). I think it must be clean at higher volume. Could you help me please??

Thanks,

Roland

[8len8]

Probably a tube problem. Try replacing the preamp tubes. If that doesn't help then replace the power amp tubes and rebias the amp.

[rchaconsandy]

Thank You. Im gonna do that.

[rchaconsandy]

Thank You. Im gonna do that.

[rschleicher]

Not to be Captain Obvious, but if the voice switch for the clean channel is in the out position, you are going to get some crunch/breakup at higher volumes. Does it clean up at all if you push the voice switch in?

If it is only happening with the master volume cranked up fairly high, then maybe it is a power amp tube biasing issue. (The pre-amp tubes don't require bias adjustment.)

[rchaconsandy]

Resuming... I cant have a clean tone at loud volume. I tested voice swtich on/off, master volume high, channel volume low or viceversa.

I had a Fender bassman silverface with de same problem that has been resolved with recap. Marshall JCM 2000 resolved retubing but I knew both could sound 100% clean without breakup.

This is my first Blackstar and I want to know if it can sounds clean cause some amps sounds crunchy at clean channel

Thanks,

[thephantum]

What you it sounds like you are describing is power tube breakup. Blackstar tube amps only have so much clean headroom. As you start pushing them hard, they overdrive. So even though they are Class AB amps, they respond similar to a Class A amp. That's just the way they are designed.

If you need to stay crystal clean at higher dB levels, you either need an amp with more power or some type of sound reinforcement (PA, slaving another amp, etc.).