OTL 195

About the OTL 195

The McAlister OTL 195 is a high-performance vacuum tube monoblock amplifier designed and hand-built by Peter McAlister. It delivers 150 watts of power and features a fully balanced design capable of driving 4-ohm loads. The amplifier includes a circuit that tracks the signal level in the driver stage and modulates the control grids of the output tubes, enhancing performance and stability. It uses horizontal output tubes EL509/PL519 and custom-wound M6 core output transformers with multiple primary and secondary sections, each layer varnished for insulation. The power supply is separate, featuring a massive transformer system, high-speed diodes, regulation, and large capacitance for stable operation. The amplifier has a flat frequency response, low distortion, and output stage/transformer overshoot of less than 1%. Customer options include front or rear panel input and speaker binding posts, choice of silver or gold front panel, LED color for power and operation status, and customizable umbilical cord length between power supply and amplifier. Dimensions are 8"H x 20"W x 12"D for the amplifier and 7"H x 13"W x 8"D for the power supply. The OTL 195 is praised for its dynamic contrasts, huge soundstage, and musical involvement, making it one of the finest high-power tube amplifiers available.