Audio Note AN-S4 - Manual (Page 6)

The AN-S4 is a passive device, designed to convert the mainly current output of your
Moving Coil cartridge (MC) to a higher voltage, low current signal of sufficient
strength to allow a Moving Magnet (MM) phonostage to amplify it to a suitable level.
The internal transformers used in the AN-S4 are manufactured by Audio Note (UK)
exclusively. Each transformer is made from 0.1mm laminated super mumetal 250
and wound with 99.99% pure Silver wire. Each Transformer is then housed in a
mumetal screening canister to minimize noise and interference.
The AN-S4 can be supplied in a variety of versions, as listed in the table below: -
AN-S4L 3 Ohm input impedance
For cartridges with an
internal impedance of 1
Ohm, primarily designed
for use with the Audio
Note (UK) IO range
AN-S4LM 4 Ohm input impedance
For cartridges with an
internal impedance of
1 to 2 Ohms
AN-S4ML 9 Ohm input impedance
For cartridges with an
internal impedance of
2 to 4 Ohms
AN-S4M 16 Ohm input impedance
For cartridges with an
internal impedance of
4 to 6 Ohms
AN-S4MH 36 Ohm input impedance
For cartridges with an
internal impedance of
9 to 12 Ohms
AN-S4H 64 Ohm input impedance
For cartridges with an
internal impedance of
16 to 21 Ohms
It is possible to use our transformers with cartridges that have greater internal
impedances or values that are outside the preferred ranges, however, it is important
to realize that an input impedance in the region of three to four times the internal
impedance of your cartridge will usually provide the best results
AN-S4 MOVING COIL STEP UP TRANSFORMER