Ortofon Verto SUT MC Moving Coil Step Up Transformer

Product no.: ORT1458

can be shipped within 7 days

Ortofon Verto SUT MC Moving Coil Step Up Transformer
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Possible delivery methods: UK Tracked with Signature, Airmail Standard, UK Express, Airmail Tracked with Signature, UK Standard, Heavy Item

Ortofon ST-80 SE & ST-7 for new applications

The Verto, not unlike its predecessors, takes an unrelenting approach to audio reproduction by combining the finest components available along with world class engineering, for unparalleled sound reproduction. 

Starting with exceptional quality Lundahl™ transformers, surrounded by a specialized mu-metal shielding, listeners can be assured that each detail in a complex array of notes is reproduced with utter purity, with freedom from internal and external sources of interference. 

These two items combined make the Verto transformer one of the quietest, most revealing transformers ever offered to the audiophile market.

Featuring dual mono design, the Verto provides discrete circuitry for each channel, resulting in the elimination of crosstalk and possible distortions. This results in cleaner, clearer reproduction with substantially increased stereo imaging. Regardless of the composition being played, the Verto’s expansive stereo separation provides lifelike realism, and accurate tonal balance devoid of coloration.

To further minimize signal degradation and maximize signal flow, the Verto has been engineered using high quality industrial grade PCB. Additionally, gold plated RCA jacks with Teflon insulation provide optimal conductivity for use with high quality interconnects. Internally, the unit is assembled with an absolute bare minimum of internal wiring, preserving absolute signal integrity. 

Verto maintains compatibility with most Moving Coil cartridges, with internal jumpers offering two gain/impedance options. This affords audiophiles with broad flexibility while still maintaining a clean aesthetic. 

Notably less green than its name implies, the Ortofon Verto step-up transformer has a heavily chromed front plate, and is otherwise enclosed in a neat black box. Like the Koetsu, the Verto has only one pair each of input and output jacks—but it has two primaries, rated at 30dB and 24dB of gain. (Input impedances aren't specified, although one can assume that the 24dB setting is more suitable for cartridges with more highly resistive coils.) As with the K&K kit and the full Shindo Masseto preamp, the Ortofon uses custom-made Lundahl trannies; unlike the bare-bones K&K, a soldering iron isn't required to switch between primaries: Just open the box and move two pairs of circuit-board jumpers.
As supplied, the Verto was set up for use with a low-output, low-impedance cartridge. It appeared to have a little less gain than the Lundahl transformer built into the Masseto, but the musical and sonic characters were identical: melodies flowed brilliantly well, and timbral colors and textures were very good. The high-gain side of the Verto had excellent drama: among the high-gain competition Set for low-gain performance, the Verto was a fine match for my Denon DL 103 phono cartridge Standard. Again, the distinction wasn't huge, and the Ortofon scored big value points for being, essentially, two trannies in one. And great trannies they are. Art Dudley Stereophile


Technical Data Configuration A:
Recommended Cartridge Impedance: 5-50 Ohm 
Gain: 24dB at 1kHz
Frequency Response: 10Hz - 100kHz ± 1 dB
Technical Data Configuration B:
Recommended Cartridge Impedance: < 10 Ohm
Gain: 30dB at 1kHz
Frequency Response: 10Hz - 80kHz ± 1 dB
Recommended Load: 47 kOhm / 200 pF

75 X 125 X 170 mm


Moving-coil cartridges have more energy than moving-magnet cartridges due the fact that their magnets are stationary, and can be stronger than those in the moving magnet cartridges. They typically have high current and low voltage, where a moving magnet cartridge has high voltage and low current.
To use a moving coil cartridge, you either have to amplify the voltage prior to reaching the phono preamp by using a Phono Stage  or to change the current into voltage that is high enough to be used by the phono preamp by using a transformer SUT
What is the difference between a Transformer and a Head-Amp:  The transformer is a passive device and therefore has certain advantages over a head amp or active device, which is most likely built with solid-state electronics  Moving Coil Cartridges have low voltage but high current.   The transformer uses the extra current that is not needed and converts it to higher voltage to allow the cartridge to match the input of the phono preamp.  Whenever you introduce something into a circuit, there is an insertion loss.  Whether there is a greater insertion loss from a transformer or a head amplifier depends more on the quality of the components than on which type of step up device is used, but a well crafted SUT has fewer parts than a head amp.
Impedance vs. Output voltage:  With transformers used for matching the outputs of MC cartridges, you would want to match the output voltage, rather than the impedance, to get a better match. (This is different from head amplifiers where you would want to match the impedance only.  Many believe  of trying to match the cartridge impedance to a step up transformer.  If you do attempt to match the impedance, you will “choke out” the cartridge and it will sound flat. With step up transformers, you match voltage, not impedance, but you do need to make sure that there is sufficient head room with the reflected impedance so it does not “choke out” the cartridge.
A conventional RIAA phono preamp has a nominal reference level of 5mV at 1kHz.  All phono preamps are different, but typically output values below 2.5 mV or above 10 mV will either result in a poor S/N ratio or overload  Clipping.  The higher the ratio, the higher the gain the louder it will sound.  Phono preamp manufacturers usually specify the input voltage as a minimum that is acceptable.  What usually is not specified is the maximum voltage that is acceptable before overloading.  The best sound is usually attained toward the high end of the range.
Take the output of your moving coil cartridge which is expressed in milli-Volts (mV) and multiply it by the step-up ratio of the transformer.  If this value falls between 2.5 mV and 10 mV, it will work.  (Remember that the 10mV is not the absolute.  It depends on the phono preamp you are using.)  The standard is 5mV (at 1 Khz), however most folks like to be in the range of around 7mV to match the volume coming from a CD player.  Now matching  is not always this simple, including the reflected impedance to consider, which is why you should take the time to ask what would be a good match for you.   



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