The name says it all! Based on the famous 1987X 50-Watt PLEXI circuit, where we have replaced the vacuum tubes for very unique transistors carefully set-up to perform the same way in each stage of pre-amplification. Taking into consideration all the mods that have been made on the 50-Watt PLEXI and other models like the JCM800, we were able to increase the attack, sustain, and cut out low frequencies to get this custom mid-range response. Compared to the 800 and 959 series, the PAL987 PLEXI CARRERA has an improved Gain knob to get a better tone structure response as you change the gain setting, an active circuit instead of a passive one is placed in the Presence knob to nail the same behavior as in the real amp, and a three-way toggle switch with a new feature that allows you to change different parameters in the circuit, increasing the versatility of the pedal.