PRODUCTS
POWER AMPLIFIER
Kagura
ONGAKU
SOUGA
GAKUOH
GAKUOH PSE
KSL-KEGON
PRE AMPLIFIER
G-1000
KSL-M77
G-70
GE-1
KSL-M7
KSL-M7/PHONO
INTEGRATED AMPLIFIER
Overture
CARTRIDGE
IO-M
MC TRANSFORMER
SFz
CFz
CABLE
Interconnect Cable
Tonearm Cable
Speaker Cable

SILVERED FORMER SFz
World of beauty alive in the silence   
Sound awakened vividly with naturalness 

Based on our silver wire application know-how compiled over years, we applied all our transformer winding skills and understandings of wire diameter versus sound characters. The new SFz is a result of full exploit of the excellent sound characteristic of pure (99.99%) silver.
Complete freshness which awakes the delicate power of music expression over a quiet space.
It is the ultimate pleasure for any analog lover.

Features

Pure Silver Balanced multi-layer winding transformer

Multi-layer winding structure is used to maintain flat frequency response up to 100kHz. The peaking level is less than 1.5dB* even under no loaded condition at the secondary. (* connecting to a phono amplifier with 47kΩ input impedance.)

multi-layer winding transformer

Extremely Thin Permalloy Core

Employed in the SFz is a large core built up with custom made ultra thin permalloy layers (100μm thickness). This unique design controls and suppresses eddy current and hysteresis loss to gain a flat response up to 100kHz. The core structure has a big sectional area and short magnetic circuit path to assure ultra low frequencies while maintaining extremely low distortion.

Extremely Thin Permalloy Core

Elimination of Contacts

Mechanical contact points have been minimized, for its application to handle ultra low level signals. SFz has two independent impedance terminals on the primary side, 1.5Ω and 30Ω. Each terminal is soldered to a lead coming directly from the coil without any intermediate connection. Likewise in the secondary side, the leads coming from the coil are soldered directly to our flagship Ls-41 pure silver output cable.

Double Shield and Double Float Mechanical Damping Construction

The transformer is mounted in permalloy case and further covered by a inner chassis made of copper. The permalloy shield works against magnetic while the copper shields Fights the electrostatic.
The transformer is carefully held with damping gel. Special rubbers are is selected and used on the feet in order to further absorb mechanical vibration.

carefully held with damping gel

Balanced mode, Unbalanced mode

The SFz enables you to receive the signal from a phono cartridge on Balanced mode or Unbalanced mode by switching the grounding point of the primary side of the transformer. In case receiving on Balanced mode, use a 2 conductor type shielded phono cable to bring out the utmost performance. When there is no hum observed, use this unit at Balanced position for wider and deeper sound stage.

* Please note that Balanced mode is not available with a turntable wherein shielded section is grounded.

Balance mode, Unbalance mode circuit

Specifications

Product MC step-up transformer
Primary impedance 1.5Ω (for 1Ω~10Ω cartridge),
30Ω (for 11Ω~40Ω cartridge)
Step-up ratio 34dB(1.5Ω), 20dB(30Ω)
Load impedance 47kΩ(recommended)
Dimension 126mm(W) 96mm(H) 179mm(D)
(excluding protrusions)
Weight 3.1kg