A legend is born. Experience a powerful new classic amplifier from the makers of the original 300B electron tube. Handmade here in the USA (Rossville, GA), the 91E single-ended amplifier was custom made for the Western Electric 300B to provide music lovers the highest possible performance and quality. This innovative design stretches the performance envelope of the 300B to a level not been previously achieved.

Steered Current Source Technology (SCS)

Experience double the traditional output power (20W) with advanced, single-ended (SE) circuit design. This new level of performance is reached by using a fully linear, steered current source (US Patent 10256776) controlled exclusively by the tube’s output voltage. The excess of common large output transformers and associated hysteresis is eliminated, and as a result, lush detail in the midrange and masterfully articulated upper and lower frequencies are revealed.

Stepped Logarithmic Attenuator

A stepped logarithmic attenuator is used to mimic the response of human hearing. The attenuator consists of only discrete resistors in a ladder configuration that are switched in and out of circuit to produce a logarithmic attenuation of the output signal.

Interchangeable Transformer Block

The standard 8-ohm transformer block can be interchanged with the optional 4-ohm or 16-ohm version. This feature is unique to the 91E Integrated Amplifier and allows users to match speaker impedance for improved fidelity. Single impedance transformers maintain lower winding capacitance normally vitiated with multiple tap transformers.

Tube Life & Warranty

The 300B electron tube is known around the world for its sound quality and powerful performance in both single-ended & push-pull amplifiers. The expected life span of this tube is a remarkable 40,000 hours of use, a figure unmatched in the industry. For perspective, that’s roughly 22 years of use at 5 hours of playback per day!

To back this up, each 300B tube comes with a 90-day warranty, extendable to 5 years once registered with Western Electric. Similarly, the 91E amplifier comes with a 90-day warranty, extendable to 3 years with registration.

Features