LL1933 Lundahl Moving Coil SUT
LL1933 Lundahl Moving Coil SUT
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LL1933 Lundahl Moving Coil SUTLL1933 Lundahl Moving Coil SUT

LL1933 Lundahl Moving Coil SUT

Lundahl
Wire: Cardas Copper
Price:
£159.00 £190.80 Inc. VAT

  • The Lundahl LL1933 is a high-performance moving coil step-up transformer designed for premium MC SUT and moving coil preamp applications. Configurable for turns ratios of 1:8 and 1:16, the LL1933 is an excellent choice for low-output moving coil cartridges requiring low noise, excellent linearity, and precise cartridge loading.

     

    The transformer is fully compatible with the MC1 DIY Kit, allowing you to build your own high-quality moving coil step-up transformer preamp using the same Lundahl technology found in high-end commercial MC SUT designs.

     

    The LL1933 combines Lundahl’s dual-coil architecture with Cardas high-purity copper wire in an oversized design. Unlike the amorphous cobalt core LL1931, the LL1933 uses a nickel lamination core chosen for its low distortion and linear magnetisation curve. This makes it a strong choice for systems where neutrality, accuracy, and low-level detail are the priority.

     

    The dual-coil structure also improves immunity to external magnetic fields from power supplies, motors, and other nearby sources of interference, while the mu-metal can provides additional shielding for low-noise moving coil applications.

     

    Available with either copper or silver wire depending on your system preference and budget.

     

    Every LL1933 pair includes a free HASL mounting PCB suitable for DIY moving coil SUT projects. For premium builds, you can upgrade to an ENIG gold-plated PCB for an additional £10.

     

    Most Lundahl transformers are wound to order and typically require a 4–8 week lead time. We do however stock selected popular models, in which case your order will ship immediately.

     

    If you need help selecting the correct ratio, cartridge loading, or designing your own moving coil step-up transformer preamp, please get in touch.

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MC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer Preamp
MC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer Preamp
MC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer Preamp
MC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer Preamp
MC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer Preamp
Roll over image to zoom in Click on image to zoom
MC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer PreampMC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer PreampMC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer PreampMC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer PreampMC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer Preamp

MC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer Preamp

Orso Audio

*Shipping June 2026*

 

The MC1 DIY kit is a complete parts pack to build your own step-up transformer preamp for moving coil (MC) cartridges. Used between your turntable and a standard MM phono input, a properly designed SUT increases signal voltage passively while preserving the low-noise, dynamic character that makes transformer coupling so compelling.

 

This kit follows the same design intent as our assembled MC1 units - robust mechanical grounding, reliable switching, and a layout that’s built for consistent real-world results.

What's included

  • Aluminium enclosure with black front panel
  • Gold-plated PCB
  • Gold-plated RCA connectors
  • High-quality switches
  • Grounding lug / hardware
  • Resistors and capacitors required for the circuit
  • Mounting hardware and essential build items required to complete assembly
  • Transformers, if purchased together

 

This kit is compatible with all Lundahl moving coil step-up transformers. 

Skill level

This is a straightforward DIY build, but it is not a “first soldering project.” We recommend prior soldering experience, as the parts are high quality and can be damaged by excess heat or poor technique.

Tools you'll need

  • Soldering iron (temperature controlled recommended)
  • Good quality solder
  • Small hand tools (flush cutters, pliers, screwdriver)

Note on responsibility

This is a DIY kit. Assembly, testing, and safe operation are the builder’s responsibility. If you are not confident with soldering and basic electronics handling, consider an assembled unit instead.

 

Transformer stock

We stock a large variety of transformers, however there may be a 4-8 week wait on some types as they might need to be ordered in especially. Please get in touch before purchasing if you have any questions.

Transformers: None
Price:
£124.00 £148.80 Inc. VAT
MC Load Calculator

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

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