The effect is full, deep and we tune the desired level of the reverb effect by ear while testing the amp before delivery. One of the amp’s qualities is also the tube driven reverb circuit. The rough pot is a “push pull” switch that allows you to pull to totally defeat the tone stack and the amp will be more aggressive, distorted and louder. Incorrectly biased output tubes will either run too hot, which. When a tube amp is biased correctly, this means the electrical current flows at an optimal rate. What makes this amp special is that the rough pot will cause the tone stack to have less and less effect as the rough pot will make the mids level up till you have a completely flat tone stack which will also help the amp to crank. ALWAYS HAVE THE BIAS CHECKED AFTER REPLACING OUTPUT TUBES. Most of the tone stack tend to have a cut in the mids so we created a setting called « rough » this pot allows you to minimize the effect of the tone stack. Tone stack allow you to adjust the three treble middle bass pots for a great deal of flexibility when dialling in. This is because tapping any tube near the bad tube appears to. You will feel the sound on your fingertips! In a guitar amp with many preamp tubes it can be difficult to determine which one is microphonic. This amp sounds really open, revealing and offer a unique tonal breath. The SAPPHIRE is a single channel amp design, with bold and full-bodied clean tones. You were looking for an organic connection with your guitar amp, you need to start with a great clean tone.
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