The 3rd Power Dream Solo 4 22W tube guitar amp head produces superb guitar tones. The DS4 departs from using EL34 output tubes and instead relies on a pair of 6V6 tubes. The 6V6 tubes do a fantastic job delivering classic British Plexi flavors with 3rd Power's signature Mastered Tone approach. The result is a superb cut and low-mid punch that's able to go from clean to mean, making it perfect for the studio or stage. A global Presence knob is the finishing touch to sparkling high end. The Volume, Treble, Middle and Bass controls offer further tweaking. With 3rd Power's proprietary volume management technology, HybridMASTER, you can record or perform with the Dream Solo Model 4 at any volume without sacrificing tone.