1366 (600 : 600)

The Kraftwerk 1366 is inspired by the iconic Marinair LO 1366 output transformer. With a 600:600 Ω impedance ratio and ungapped EI core construction, this model delivers the smooth, rounded tone associated with vintage British consoles—ideal for final output stages where musical character and bandwidth both matter.
Though not an exact replica, the 1366 captures the spirit and response of the original while offering slightly refined performance and symmetry.
 
 
 
Model
1366
Turns Ratio
1 : 1
Impedance Ratio
1 : 1
Nominal Impedance
600 : 600 Ω
DCR
11 Ω (P1) / 11 Ω (P2) / 28 Ω (S1) / 28 Ω (S2)
Primary Inductance (100 Hz)
11 H (total)
 
 
Core Material
CRGO M6
Core Format
EI57 Ungapped
Recommended Load
600–2k Ω
Frequency Response
±3 dB from 13 Hz to 55 kHz
Wideband response with vintage tonal flavor.
Perfect for final output or reamp stages with symmetrical character.
Based on ungapped EI configuration, reflecting Marinair LO 1366 heritage.