With a simple set of useful controls, a single master volume, and 50 or 100 watts of clean headroom, the Pearl head is an incredibly versatile amplifier designed to lay a rich tonal foundation for every type of guitarist. Whether it's being used at bedroom volumes or on a large stage, the Pearl excels in every setting. Musicians using effect pedals to achieve an overdriven tone will be amazed at how the Pearl’s clean, all-tube hand wired circuit can bring new life to the drive pedals in their rig. Musicians using time-based or modulation effects will also find that the Pearl’s tube powered effects loop creates a great platform for effects they prefer to keep completely clean. The Port City Pearl features: Interactive Treble, Middle, and Bass controls Bright Switch for more high-end frequency tone shaping JJ ECC83 - Preamp JJ ECC81 - Effects Loop JJ ECC83 - Phase Inverter TAD matched 6L6 (x2 in 50W, x4 in 100W) JJ GZ34 Rectifier (100 Watt is rectified with silicon diodes) USA Heyboer Transformers Tube Buffered Effects Loop 120V/240V Voltage Selector Weight: 26 lbs (50W) // 31 lbs (100W) 20"W // 10.5"H //8.25"D 2, 4, and 8 ohm impedance selector (4, 8, and 16 ohm on 100 Watt version) The Pearl head ships with a proprietary 2-foot Kimber speaker cable.