Welcome to GerusAudio, Manufacturer of 300B SE Stereo Tube Amplifiers

05/10/2019 Update: Introducing the Gerus Audio WE91/300B

GerusAudio

Introduction

The vision of GerusAudio is to build affordable, aesthetically appealing high quality 300B Single Ended Stereo tube amplifiers.


Key features:

  • DC heaters for the drivers and the power tubes
  • Lundahl Output Transforms
  • Jensen Copper/Oil Coupling Capacitors
  • Illuminated On/Off Switch
  • AnTek Audio grade Toroidal Power Transforms
  • Unique hardwood and steel chassis




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About the build Process

At GerusAudio we build the chassis in advance, you select from what is completed or in process.


What does that mean to you?

  • You purchase a product with the appearance and power level that suits your tastes/needs
  • Lead time is reduced
  • Upgrade options available



300B Series:

  • 6SJ7 or 6SH7 Input/Driver
  • 300B
  • Please note: The 300B tubes are NOT included with the amplifier. It's up to you to provide the 300B's of your choice. For testing the amplifier I use Genalex Gold Lion PX 300B's. Some day I hope to lucky enough to own a pair of Western Electric 300B's!


A3 Series: (Built by request only)

  • 6SH7 Input/Driver
  • 2A3, 6A3 or 6B4G

Design Philosophy

Parts

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GerusAudio uses high quality parts.

  • Lundahl OPT's 
  • Jensen Copper/Oil  Coupling Capacitors
  • Vintage tubes (when available)


Appearance

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At GerusAudio we believe the amplifier needs to look as good as it sounds. 



Price Point

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GerusAudio offers a competitive price point for an American made product. 


Power Tubes

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Why use a 6A3 or 6B4G instead of the 2A3? 

  • The 6A3 and 6B4G are the same as a 2A3 from a power output standpoint.
  • They sell for about 1/2 the price of a NOS 2A3
  • They work perfectly with DC heaters
  • Readily available


Input/Driver

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Why use Pentodes for the Input/Driver?

  • To get the required voltage gain with just one tube / one stage
  • Only one coupling capacitor required
  • High current compared to triodes


Contact Information

Drop us a line!

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GerusAudio

scott.gerus@gmail.com