Desired load is below 40 Ω. Consider using a primary-side load for very low target impedances.
-
The LL7903 is a large, high level, high performance audio transformer, made for extraordinary requirements. The transformer combines high level capability (+28 dBU @ 50 Hz primary level) with low copper resistance and is designed for the most demanding applications.
The LL7903 consists of two coils, each with two primary
and two secondary windings separated by electrostatic shields. The core is a high permeability mu metal
lamination core.
MC1 Load Calculator
Optimise your moving coil cartridge loading
Results
Required Resistor (Theoretical):
N/A
MC1 Resistor:
N/A
MC1 Input Z:
N/A
Voltage Gain:
N/A
Output Voltage:
N/A
Instructions
- Select your transformer model and step-up ratio
- Enter your phono input impedance (default is 47kΩ)
- Enter the desired load impedance for your cartridge
- Optionally enter cartridge specs for gain predictions
- Click Calculate for loading recommendations
Notes:
When the desired load is below 40 Ω, you’ll see an advisory suggesting a primary-side load. Calculations still run normally.
"No resistor required" - Phono input already provides suitable load
Moving Coil Step Up Transformers explained
Unsure what exactly is going on? Read our blogs for a deep dive
Find out more