SUT-1L Step-up Transformer

Our SUT-1L is designed for a wide range of low-impedance MC pickups with an internal resistance of up to 10 ohm. There are adapter plugs (RCA sockets on the device) for the perfect symbiosis with specific output voltages.

MK Analogue SUT-1L step-up tranformer with phono cabling

The SUT-1L’s design is utterly uncompromising in terms of:

Frequency Response

Phase Linearity

Dynamic Behaviour

Signal-to-Noise Ratio

‘Hum Sensitivity’

Signal Routing

This is what the result sounds like

Our SUT-1L simply disappears. It gives free rein to the music and the characteristics of the pickup. The sound is natural, clear, tidy, direct, and supremely confident – exactly what the pickup manufacturer had in mind. The music flows, and the listener enjoys.

Logo german magazine image hifi

“The MK Analogue SUT-1L MC transformer puts on a stellar performance that instantly catapults it into the top tier of the transformer guild. Between the juicy sound of my Air Tight ATH-3, which reminds me of a glass of a great red wine, and the almost unfathomable neutrality and transparency of Consolidated Audio, it confidently finds its place.”

Image HiFi, 2022, Read the whole review (PDF)
MK Analogue Step-up Transformer SUT-1M – front and back

The ‘Perfect’ Shielding

We attach great importance to consistent shielding of the transformer, not only against electromagnetic interference, but also against resonance and direct sound. Our SUT-1L is like a pillar, providing stability to the whole chain:

  • MU metal encapsulation for the actual transformer;
  • A brass body lined with bitumen mats, which in turn surrounds the MU-metal capsule;
  • The entire aluminium housing lined with bitumen mats;
  • Connection of the base plate with an additional stainless steel plate: sandwich construction for further resonance optimisation, and
  • Sorbothane feet for decoupling from the ground.

The result: absolute serenity.

The SUT-1L eliminates all interference and noise as it is acoustically decoupled in several ways. Vibrations and microphony are no longer an issue. This gives free rein to the music signal. Furthermore, the transformer can be placed exactly where it is needed. No hum or other interference will disturb your musical experience.

‘Direct’ Premium Wiring

‘Every solder joint is one too many’. This simple wisdom was our stipulation for the internal wiring of the SUT-1L. For the two transformer stages – 24 dB and 30 dB voltage boost – two separate inputs are used, to which the signal lines of the transformer are directly connected. There is no need for another switch.

This enabled us to reduce the number of connection points by 70 %. For the remaining wiring paths, we used specially manufactured and individually twisted strands. In this way, we again minimised the negative influences on this short, but critically sensitive, signal path. No resonance-prone circuit board was used, which drastically reduced the construction time, nor were mutually influencing signal conductors: instead, self-sufficient, individually shielded signal conductors with capacity reduced by 60 % were used.

The result: more options without compromise

The SUT-1L offers flexibility in terms of amplification and adjustment of the terminating impedance while simultaneously reducing contact and problem points (switching stages).

Fully Balanced Structure

The pickup signal is inherently balanced. From a purely technical point of view, an MC pickup works like a dynamic microphone and, as such, should operate in a balanced mode. And with good reason, as a balanced signal routing is much less susceptible to interference than an unbalanced one.

The result: come closer.

The SUT-L1 ensures ‘pure’ signal transmission, placing you closer to music and the experience of pickup characteristics.

Oh, One More Thing: What Is the Transformer Core Made of?

The heart of the SUT-1L is also our secret, into which we have poured our heart and soul. It is produced in Germany, let’s leave it at that. Just listen to the result!

Technical data and details, price

Structurefully balanced
Input and transformer ratios
  • XLR 24 dB
  • XLR 30 dB

See our SUT-1M for 14 dB and 20 dB amplification

Termination impedance (47 kohm)
  • 30 dB – 46 ohm (for cartridges from 0.1 to approx. 0.2 mV output voltage)
  • 24 dB – 184 ohm (for cartridges from 0.3 to approx. 0.5 mV output voltage)
Frequency response
  • 10 Hz to 65.000 Hz (– 3 dB; 24 dB)
  • 10 Hz to 35.000 Hz (– 3 dB; 30 dB)
Signal-to-noise ratio115 dB (-10 dB V)
DistortionK3 < 0,01 %  (f = 40 Hz, – 40 dB V)
DC Resistance
  • 10,2 Ohm (1 : 16)
  • 2,6 OHm (1 : 32)
Output Impedance400 Ohm
FeetSorbolution (Sorbathane)
Dimensions145 × 95 × 160 mm (W × H × D)
Weight2.75 kg
Coloursblack, silver
Retail price incl. VAT3.190 €, including 2 pairs of matching plugs for 24 dB = 100 ohm and 30 dB = 11.5 ohm

A Non-exhaustive List of Pickups That Work Very Well with the MK Analogue SUT-1L:

  • Aidas CU Series, AG-CU Series, AU-CU Series, AU-Series
  • Air Tight PC 1 Coda, PC-1 Supreme, Opus-1 MC
  • Dynavector Te Kaitora Rua, DRT XV-1S, DRT XV-1T
  • Etsuro Urushi Cobalt Blue, Bordeaux, Gold
  • Goldring Ethos
  • Hana ML, Umami Red
  • Ikeda 9TS, 9TT, Ikeda KAI
  • Koetsu Black (Goldline), Rosewood (Standard, Signature, Signature Platinum), alle Koetsu Urushi-Modelle, Koetsu Onyx Platinum
  • Lyra Deos, Kleos, Kleos SL, Etna and Atlas
  • Mutech Hayabusa
  • My Sonic Lab (all models)
  • Ortofon Cadenza (complete series)
  • Ortofon MC Windfeld Ti Heritage
  • Phasemation PP-300, PP500, PP-2000
  • Sky Analog G-1, G2, P-1
  • SPU Classic GM MK II
  • SPU #1
  • SPU Synergy
  • Thorens SPU
  • ZYX Ultimate 4D XH SB, Ultimate Omega XH SB, Ultimate Airy XH, Ultimate 100, Ultimate Diamond, Ultimate Astra
SUT-1L step-up transformer from MK Analogue: intelligent labelling of the connection options

Optional cabling

MK Analogue Phono cable 5 Pin to XLR male

We are offering phono cabling in all variations and with best price-performance ratio. Thanks to numerous listening sessions and cable comparisons, we decided on a cable whose material, winding and shielding concept are predestined for high-end phono reproduction.

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