Western Electric 91E Integrated Amplifier

Western Electric 91E Integrated flagship amplifier is finally here. “Built to the highest standards of Western Electric quality, the 91E is the most advanced single-ended amplifier available.”  

Introducing a revolutionary new integrated amplifier from Western Electric. Meet ambitious, single-ended sound inspired by its famous predecessor, the WE 91A.
Experience double the power. A never before realized level of performance has been achieved with a completely new approach to SE amplifier design. Developed over five years, the 91E’s circuitry intelligently steers the parallel feed constant current source (SCCS), allowing the tubes to deliver more than double their previously rated output of 7-8 watts. You’ve never heard the 300B like this before.
Double the Performance
Full-throttle tube sound, made possible by patented smart SE circuit design
Inspired Originality
The first original product by Western Electric in over 15 years, continuing a proud legacy of quality, American manufacturing
Don’t Forget the Tubes
The 91E ships with new production 300B’s, the most popular vacuum tubes in the world.

What You Need To Know

  • Initial units of the 91E are entering the final stages of assembly and quality inspection.
  • In the meantime, we’ve introduced a pre-order system that allows you to reserve a spot in line, free of charge.
  • As an early bird, you’ll receive a 10% discount, automatically applied.* All updates, including payment instructions are sent via email at a later date. Financing available.
  • Orders will begin shipping in early 2022.** Due to limited staffing and high, worldwide demand, be advised that your order may not ship within thirty (30) days. Limited quantities available.  
The 91A is commissioned by Western Electric under its film sound subsidiary company Electrical Research Products Incorporated (ERPI).
The 300B is born. Almost identical to its predecessor the 300A, the 300B arrives at a time when tube amplifier technology was transforming the world of sound, from radio broadcasting and radar technology, to Hollywood movies and telephony.
Over 150 years after the birth of Western Electric, a new manufacturing facility is established. Side-by-side with 300B production, an amplifier research and design laboratory is set up for the completion of the 91E Integrated Amplifier project.


  • Weight 49lbs / 22.2 kg
  • Dimensions 18.9 x 15 x 11.1” / 48 x 38 x 28cm
  • Chassis Machined Aluminum
  • Colors Nickel, Gold, Black
  • Operating Voltage 100V / 115V / 230V / 50-60Hz
  • Power Consumption (Operation / Standby) 160W / 0.3W
  • Mains Fuse 2A slow-blow
  • Electron Tube Complement One Matched Pair Western Electric 300B, 2x ECC81
  • Phono MM Sensitivity (10W / 4Ω) 0.75mV
  • Phono MC Sensitivity (10W / 4Ω) 70μV
  • CD Sensitivity (10W / 4Ω) 0.27V
  • CD Input Impedance 20 kOhms
  • Phono MM Input Impedance 47 kOhms | | 100 pF
  • SNR MM (10W / 4Ω, input 5mV) 83 dB(A)
  • SNR MC (10W / 4Ω, input 0.5mV) 73 dB(A)
  • SNR CD (10W / 4Ω, input 0.5V) 101 dB(A)
  • CD Frequency Response 15 Hz – 32 kHz (-3 dB)
  • Phono Frequency Response 30 Hz – 20 kHz (RIAA within +/- 0.5 dB)
  • Output Power / 4 Ω / THD 10% 2 x 20 watts
  • Output Power / 4 Ω / THD 5% 2 x 16 watts
  • Output Power / 4 Ω / THD 3% 2 x 14 watts
  • Output Power / 8 Ω / THD 10% 2 x 20 watts
  • Output Power / 8 Ω / THD 5% 2 x 16 watts
  • Output Power / 8 Ω / THD 3% 2 x 14 watts
  • BT* Standard v4.2
  • BT* Codecs BC, MP3, AAC, Fastream, APTX
  • BT* Sample Rate (adaptive) Up to 96kHz / 16-bit
  • BT* frequency response 20 Hz – 20 kHz
  • BT* SNR 96dB