Glenn – Mono Power Amplifier

The world’s greatest 300B amplifiers ever build?

The ‘’Glenn’’ Parralel Single Ended 300B mono amplifiers are Trafomatic Audio’s latest statement amplifiers and truly formidable to behold. These elegant, handbuild amplifiers provide the shortest paths between components. Combine Sasa Cokic experience of over 30 years of tube amplifier buildings with oversized output transformers and the best components possible and you get what the Glenn amplifiers are all about: a true  work of art!

The Glenn story started as a the idea for a crossbread between the Experience 2 MK II and  the Experience Reference 300B: the power and authority of the Reference and the versatility of the Experience. This way creating an amplifier which can be used with all kinds of 300B tubes available on the market and bringing you the most universal 300B power amp ever build. Even the negative feedback can be adjusted between 0 dB and -3 dB in steps of 1 dB, which makes it the most complete 300B amps money can buy.


  1. Interstage transformer coupling between stages
  2. Implements special C-L-C anode voltage filter using Mundorf MLytic HV type electrolytic and High inductivity filter choke made by Trafomatic Audio
  3. Oversized , low inductivity II C core main transformers
  4. II C core oversized output transformers
  5. The output transformers are highly sectioned with harmonically sized sections, which results in a minimum leakage inductance and the best high frequency performance
  6. There also are WBT connectors and Teflon tube sockets

The Glenn monoblocks run E182CC NOS tube and two direct heated triode 300b as well as 5U4G tube rectifier. Each amp houses an epoxy resin-potted 6kg double C-core output transformer, 10Kg main power double C- core transformer , one  high inductivity filter choke and an interstage transformer for driving 300b tubes all made by Trafomatic Audio

The Glenn Parralel Single Ended 300B mono amplifiers: Pure and elegant in design, hard wired circuit minimalism with very high quality parts preserves the primal qualities of reproduced sound and opens up new dimensions for the playback experience.

Hear for yourself!

Glenn – Image gallery


Class of operation: Parallel Single-Ended (class A), Direct Heated Triode (DHT)
Tube complement: 2x300B, 1x E182CC, 1x 5U4G
Input impedance: 47K
Inputs: 1x XLR, 1x RCA
Input sensitivity: 3Vpp
Outputs: 4 and 8 ohm
Output power: 12-26W, depending on the tube and selected plate dissipation setting
THD: 4% at maximum power and with 1kHz signal
S/N ratio: 90 dB
Frequency bandwidth:  8Hz (-2dB) – 60kHz (-3dB)
Input voltage: 230V/50Hz (100-120-220-240V, 50-60Hz available on request)
Power consumption: 250VA
Weight: 26 kg per unit